5th Class Power Engineering Practice Exam

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• Unit ventilators are typically equipped with switches to regulate which aspect?
• The "D" type boiler is constructed with _____ drums.
• Which document outlines the necessary qualifications for supervisory personnel in power engineering?
• From the equation V = lwh, how can you isolate l when given V, w, and h?
• According to local codes, what is the minimum amount of outdoor ventilation air suggested per person in places without smoking?
• Which of the following is a type of mechanical ventilation system?
• What is Secondary Air (SA) in relation to fuel contact?
• What connects the tubes of a serpentine watertube boiler to the upper and lower headers?
• When transposing the equation E = RI to solve for I, what is the resulting formula?
• What does the term CSA stand for with respect to power engineering?
• The electrode type electric boiler consists of two cylindrical chambers. What are they?
• What type of valves are globe valves primarily used for?
• One of the main functions of the compressor in a refrigeration system is to raise the pressure and temperature of what?
• For which pipe sizes are screwed joints limited in refrigeration piping intended for pressures of 1750 kPa and higher?
• Which of the following is NOT a reason for cooling the air in pneumatic systems?
• If the combustion control safety lock-out switch is tripped, what should be done?
• What is the employee's responsibility regarding safety?
• In plumbing, what is the purpose of a downspout?
• What is the potential outcome of improper admission of fresh air into a room?
• What is the main function of a thrust bearing?
• What is one of the corrosion risks associated with air in steam lines?
• What does line voltage refer to in electrical controls?
• What is the inside diameter for a 60.3 mm (2 inch) nominal pipe size?
• According to applicable codes, how much refrigerant can be discharged into the atmosphere using a manually operated valve in case of emergency?
• What is the normal supply pressure of the compressed air used for starting the engine in a microturbine?
• A turning moment or "Moment" refers to what?
• Flow switches are used on chilled water lines primarily as what type of switch?
• The float operated low water fuel cut-off functions based on which principle?
• Which method is commonly used to provide expansion in pipelines?
• What smoke is produced by a sulphur candle when exposed to ammonia fumes?
• How should horizontal refrigeration piping lines be sloped in the direction of refrigerant flow?
• What compound is formed when overheated oil breaks down?
• Which factor controls oil temperature in a hot oil system?
• Which component is crucial for transferring heat in forced air systems?
• What is a common unit of measurement for area?
• What is the reduced form of the fraction 16/64?
• How should you manipulate the formula for the area of a circle to express A?
• If the refrigeration compressor is equipped with an oil sump heater, what must be ensured about the oil temperature?
• What is an advantage of using plastic piping?
• Kinetic energy (KE) is defined as:
• What is a common operational challenge for cooling towers in warmer climates?
• Which boiler type is similar in construction to a Firebox boiler?
• Moisture can increase the amount of current flowing through the body by how many times?
• What is the best way to ensure adequate attention is given to the boiler and its control equipment?
• What classification does the HRT boiler fall under regarding passes?
• What type of boiler has a cylindrical shell connected to tubes between the upper and lower tube sheets?
• Why is it easier to modify regulations compared to Acts?
• What characteristic does a slip expansion joint require compared to an expansion bend?
• Which code contains rules for the construction of low-pressure hot water supply boilers?
• When a pilot gas valve is interrupted, what happens to the ignition transformer and pilot gas valve after the main burner ignition?
• What is a potential consequence of having too much refrigerant in the evaporator?
• What type of pumps are often used to assist condensate flow in large buildings?
• What is the primary function of ventilation in an air conditioning system?
• During which condition might an automatic shutdown device operate in a typical two-stage compressor?
• What is the conversion factor from psi to kPa?
• The primary purpose of a P-trap is to:
• What is the primary benefit of using variable speed fans in cooling towers?
• How can a percentage be converted into a fraction?
• When preparing for confined space entry, which material hazard is considered 'unique' to that entry?
• What is a major source of injury to the public in a building environment?
• What percentage of water is evaporated during the actual heat transfer process in a cooling tower?
• What aspect of a heating system can lead to excessive noise if not properly designed?
• The time taken for the automatic pilot valve to close in the event of a loss of flame detection is about ______ seconds.
• What is a potential cause for insufficient steam supply if there is steam bypassing to the return line?
• What component is necessary in multi-zone hot water heating systems to equalize flow resistance?
• What type of power supply does a typical electric starter motor require?
• How can the high limit control be tested?
• Which of the following components are commonly found in systems to reduce water hammer effects?
• Older radiators were made of cast iron and joined using which method?
• Why is it critical to use the correct viscosity oil in machinery?
• What characteristic should oils have to be suitable for a hot oil system?
• What purpose does the electrolyte serve in pure water used for electric boilers?
• How long should a condensate receiver tank be able to hold water at normal steaming rates?
• When the return main is located above the water line in a steam heating system, what is this type of return called?
• What variable is sensed in the On-Off method of steam heating boiler burner control?
• What is the resistance of a photo cell when exposed to light?
• What action should be taken if a tube leak is suspected during boiler operation?
• What is a common use of soft-solder fittings in refrigeration systems?
• Which of the following is NOT typically found in Acts related to power engineering?
• Where is the combustion chamber located in a serpentine watertube boiler?
• What type of boiler is typically used for efficient heating in commercial applications?
• Which of the following conditions denotes high humidity from a health perspective?
• Which of the following defines a force?
• Which of the following can lead to flaking and pitting of bearing surfaces?
• How often should steam heating boilers with little or no make-up water be blown down?
• WHMIS stands for:
• Any two-dimensional object is measured in units of:
• If a compressor has a volumetric efficiency of 70% and the theoretical mass is 8.65 kg/min, what is the actual mass moved?
• What is a common symptom of a malfunctioning refrigeration system?
• What component is used to join the grooved pipe system?
• What is a main disadvantage of using an electric boiler?
• Which of the following is NOT a reason for a float-controlled valve in a water closet flush tank to leak?
• What is the purpose of gutters in a building structure?
• At what temperature does a hot water heater's temperature relief valve typically activate?
• What can significantly reduce the rate of heat transfer in a condenser?
• What is the emission temperature range of a low temperature catalytic heater?
• What is typically true about the design of rotary compressors?
• The pressure-actuated refrigeration control is primarily actuated by what element?
• According to the CSA B52 Mechanical Refrigeration Code, what is the maximum pressure at which the pressure limiting device should stop the compressor?
• What type of valve is commonly used to prevent backflow in plumbing systems?
• What is a common feature of a non-recirculating hot water system?
• What is one of the primary functions of Acts related to power engineering?
• Which type of control can accomplish the operation of starting, stopping, and unloading the compressor?
• What unit is used to express thermal transmittance (U-factor)?
• What is the general rule for evaporation temperature in a compression refrigeration system in relation to the cooled medium?
• When does a material typically undergo latent heat of solidification?
• In the SI system, how is draft for heating boilers typically measured?
• Convert 3 m, 2 cm, and 4 mm to inches.
• What distinguishes a locomotive boiler's structure?
• What is the name of the international code that is enforced by all jurisdictions in power engineering?
• What effect does insufficient liquid refrigerant in the evaporator have?
• During the charging process, where is the refrigerant stored in liquid form?
• Thermal conductivity (λ) represents what type of heat flow through a material?
• Which component allows the compressor in microturbines to draw in air?
• What is a primary advantage of bent tube boilers?
• In forced warm air heating systems, what is typically adjusted to optimize system efficiency?
• The non-return stop valve in a steam system is typically connected to what?
• Through which pipe do wastes from plumbing fixtures typically discharge?
• How is the diameter of commercial pipe typically measured?
• What components make up the motor operator used with a motor-operated valve?
• Pressure can be defined as what?
• In multiplication, which term refers to the number that another number is being multiplied by?
• Which refrigerant group indicates a low level of flammability?
• What physical state does water form when it undergoes solidification?
• An advantage of a multiple heating boiler plant is:
• What is required before a boiler can be fired?
• A _________ valve, also called an automatic fill valve, is needed to keep a hot water heating system with a closed expansion tank automatically filled and under proper pressure.
• The boiler vent valve is used for the purpose of allowing:
• What is one of the main purposes of conducting an external boiler inspection?
• The coefficient of thermal conductivity (k) measures what aspect of a material?
• Which of the following is a key component of the WHMIS system?
• What process is used to maintain temperature and supply fresh air in occupied areas?
• Confined spaces can include all of the following EXCEPT:
• If you have the volume formula for a rectangular prism, what does the formula V = lwh transpose for h yield?
• What is the term for the forcing of air into a building by means of fans?
• Which of the following is one of the three basic components of the WHMIS system?
• What is the service temperature limit of Magnesia (85%) pipe insulation?
• Which type of humidifier is frequently used for residential purposes?
• What term describes the refrigerant’s ability to change from liquid to vapour in the evaporator?
• Which of the following is NOT a potential hazard of confined space entry?
• At what speed range do microturbines typically operate?
• What does a heat exchanger in a compression refrigerating system transfer heat to?
• In which position must the vanes be for the compressor to start according to the vane closed switch?
• What can be done to improve heating efficiency in warm air systems?
• Which aspect of workplace safety does WHMIS emphasize?
• What is added to pure water to allow it to conduct electricity in electric boilers?
• What is thermal transmittance or U-factor (U) used to measure?
• In terms of fluid movement, what does 'dynamic head' refer to?
• What does a luminaire refer to in lighting terminology?
• What is the role of a safety valve in compressor systems?
• What issue may occur if a float-controlled valve is leaking?
• To reduce wear, moving surfaces should be separated by what type of substance?
• What is the wind velocity used to calculate summer infiltration heat gains?
• A modular cast-iron heating boiler is composed of what?
• Which refrigerant has a strong, pungent smell?
• What is typically necessary for effective pump operation?
• High friction in mechanical systems can lead to what?
• What are the approximate proportions of oxygen and nitrogen in air by volume?
• Which of the following is typically not included with intercoolers?
• Solid lubricants are best suited for use under which conditions?
• When calculating the perimeter of a rectangle, which formula should be used?
• What does the term "work" refer to in physics?
• When steam is supplied upwards through risers to heating units, what is the heating system referred to as?
• What is the function of filtration in an air conditioning system?
• Which heating system provides individual room temperature control effectively?
• Which aspect of multiple heating boiler plants is typically emphasized for operational efficiency?
• The pounding or banging of pipes and shuddering of fixtures caused by a shock wave resulting from a sudden stop of water flow in a pipe is:
• Air in hot water heating systems forms air pockets which___________.
• The cold deck air in a dual duct system is supplied at approximately __________ on a year-round basis.
• What is the maximum pressure allowed for a low-pressure steam heating boiler?
• What should the condenser pressure be in a refrigeration system?
• What is the function of the sealing ring in a rotating mechanical seal?
• In an improved design of a thrust bearing, the bearing surfaces are shaped like:
• What term is used to describe the air used for atomizing fuel in a burner?
• What force should be applied to determine the tension in a blower's driving belt?
• What is the ultimate goal of the WHMIS system?
• An essential part of a forced draft cooling tower operation is
• Which of the following statements is true about heating boilers?
• What transformation does the crosshead in a double-acting compressor facilitate?
• Which of the following is one of the mechanical ventilation systems?
• What is the benefit of having all heating units receiving water at the same temperature?
• What feature of an electric boiler may require special considerations for noise levels?
• What factor does the thermal resistance of a material depend on?
• An electric starter motor for an internal combustion engine is typically powered by which voltage?
• In emergency situations, which type of lighting must be automatically provided for safe egress?
• Which type of steam trap operates based on thermodynamic principles?
• What controls the load on an electrode-type electric boiler?
• Which of the following is considered a flammability characteristic?
• Which code contains guidelines for the care and operation of heating boilers?
• Where should the float rod be adjusted to properly operate the inlet valve?
• What does the presence of bulges or blisters on the fireside of a boiler indicate?
• What is a common characteristic of a "D" type boiler?
• Which of the following is a unit of energy?
• What is the normal maximum air pressure in a dry pipe sprinkler system?
• What is the purpose of the expansion tank in a hot water heating system?
• What wire is used to transmit electric current to the burner in a typical electric control system?
• How deep should heating coils in a snow melting system be embedded below the concrete surface?
• What is one of the key characteristics of the combustion process in microturbines?
• Which of the following are advantages of packaged watertube boilers?
• What type of heating methods does indirect heating typically involve?
• Which device is used to confirm that the fan motor is operational?
• Which component is essential for creating a vacuum to lift liquids in a centrifugal pump?
• What are the two adjustable variables contained in an On-Off pressure controller?
• What does the term 'black light' refer to?
• What is the common term for long parallel rollers in bearings?
• Which of the following is a property of good lubricants?
• A typical range for the pressure setting of an automatic fill valve (pressure reducing valve) in a hot water heating system is:
• What component in the compression refrigeration system absorbs heat from the surrounding medium?
• In the context of Power Engineering, what do the letters "SIAP" represent?
• What is a major day-to-day priority concerning building safety?
• What is the primary function of an evaporator in a refrigeration system?
• What is an advantage of using a refractory burner?
• For which purpose are operating controls on heating boilers primarily designed?
• What is the circumference of a circle calculated using?
• What is the formula for E derived from the equation P = EI?
• Find the lateral area in square metres of a steam pipe that is 15 cm in diameter and 3 m long.
• What does the quartz lamp electric infrared heating element consist of?
• What does the Celsius scale mark as the boiling point of water?
• What class of WHMIS hazard classification has three hazard symbols?
• When taking a steam boiler out of service, what is the temperature the water must be maintained above for about one hour to release gases?
• What is the minimum size for a vertical drain pipe and blowoff valve in an automatic low water level fuel cut-off and water feeding device?
• What type of resistance does cast iron have that makes it suitable for sewage and storm drainage lines?
• What is the service temperature limit of refractory fiber insulation?
• In the refrigeration process, heat is transferred from the substance to be cooled to which lower temperature substance?
• What is the primary function of a photo cell in a lighting system?
• In portable locomotive boilers, where was the draft inducer typically found?
• What is considered the forerunner of the modern packaged firetube boiler?
• What does the valve stem connect in a valve assembly?
• What is a critical factor in selecting piping for clean steam applications?
• Which component is essential for maintaining operational pressure in a cooling system?
• What is maintained by the flow control or expansion valve in a direct-expansion type evaporator?
• What is the maximum temperature recommended for radiant panel heating in ceilings?
• Governmental agencies related to fire regulations primarily focus on what?
• What is one cause of insufficient steam supply to a steam heating unit?
• What is the distance from the center of a circle to its circumference called?
• What is the source of feed water for generating clean steam?
• Which device is used to prevent backflow and control cross connections?
• What is a fundamental requirement for the operation of a generator set that utilizes an electric starter?
• Which of the following is not a possible cause of a centrifugal pump overloading the driver?
• What is a major disadvantage of using compressed air to drive tools compared to electricity or steam?
• Which of the following statements about the flow of heat energy is true?
• How much moisture can silica-gel adsorb in relation to its own weight?
• What component of an internal combustion engine is rotated by the electric starter motor?
• What symptom may indicate a lack of refrigerant in a refrigeration system?
• The Canadian Registration Number (CRN) is required for:
• What is the function of a hydraulic oil pump in a motorized gas valve?
• What color should the glass-fronted box for the emergency valve be painted?
• What is the term for the control of light produced by a lamp using surfaces that refract, reflect or absorb light?
• What is the service temperature of Reflective Metal Insulation above?
• What is a common disadvantage of forced warm air heating systems?
• What structural feature is common to firebox boilers and locomotive boilers?
• Under WHMIS legislation, what right do all workers have?
• Which feature allows for more uniform temperature distribution in a forced warm air heating system?
• What is the purpose of the equalizing line in a thermal expansion valve?
• What is the function of metal fins attached to the tube of a convector?
• The programmed startup sequence of oil-fired boilers with no pilot light begins with:
• At what temperature is the water in a hot water heating system typically maintained to ensure safety?
• A straight line drawn through the centre and touching the circumference on each side is called the:
• To which code must the specifications of an air receiver conform?
• Which of the following is considered an undesirable feature of microturbines?
• What would the correct rearrangement of I = E / R yield if solving for R?
• A type of humidifier known for its wetted element design is referred to as which type?
• Which of the following is NOT considered a personal precaution?
• The letters CRN stand for what in the context of power engineering?
• Which component is responsible for removing water impurities in a refrigeration system?
• What is forced up and down in the cylinder of a reciprocating compressor?
• The original dimmer type that diverted current used a/an:
• What is the primary function of heating coils in snow melting systems?
• In Section 1 of the MSDS, which information is NOT typically provided?
• What type of emergency lighting is required for office buildings with occupancy over 1000 according to the Life Safety Code?
• Which unit is commonly used to measure area?
• The plate surface evaporator is usually categorized as which type of evaporator?
• What is the primary function of an air dryer in compression systems?
• What is the most critical rule for the safe operation of steam boilers?
• What is NOT required to be included in the WHMIS training program for employees?
• To prevent damage to the reciprocating compressor, what are compressors often fitted with?
• When using a halide torch detector to find escaping refrigerant, what color does the flame turn?
• In an oil fired boiler, how does the fuel enter the furnace before being ignited?
• During the coldest winter days, what percentage of outdoor air is typically used in a system designed for 12.5°C (55°F)?
• What potential danger does welding present to others in the area?
• Which of the following statements regarding microturbines is NOT true?
• In which system is clean steam commonly used?
• When priming a pump with a separate hand-operated pump, which step is NOT necessary?
• When is it permissible to tighten the packing nuts on a boiler gauge glass?
• Which of the following actions is critical when a boiler is under evaluation for safety?
• In a compression refrigeration system, what happens to the vapor during compression?
• What is the primary purpose of an expansion valve in a refrigeration system?
• Which code governs the rules for the construction of power boilers?
• In a multiple heating boiler plant, how are the boilers or modules typically connected?
• How much heat is required to melt 1 tonne (1000 kg) of ice at 0°C in 24 hours?
• Where is the oil separator located in a compression refrigeration system?
• What does the refrigerant flow control affect in a refrigeration system?
• Which factor is NOT something that is minimized in building air infiltration?
• Why is allowance for expansion and contraction of piping necessary?
• What characteristic should oils used as heat transfer fluid in a hot oil system possess?
• Before adding or subtracting fractions, what must they have in common?
• Who is ultimately responsible for maintaining safe conditions against fire hazards in a building?
• Which type of humidifier is categorized under residential use and typically involves moisture retention without excessive evaporation?
• What is the primary component used in a cooling system that affects pressure?
• In which systems is clean steam typically utilized?
• A pressure-actuated refrigeration control cannot be used with which type of expansion valve?
• What type of boiler often requires careful management of the combustion chamber contents?
• What is the role of dehumidification in an air conditioning system?
• Which of the following services is NOT provided by lubricants?
• Which of the following is not a principal component of a simple closed-cycle compression refrigeration system?
• What is the typical flue gas temperature at the exit of an older warm air furnace?
• What is the equivalent of 21 USCS gallons in liters?
• Which property of a refrigerant is critical in determining its effectiveness in a refrigeration cycle?
• What term describes the distance measured around the outline of a rectangle?
• What is the term for the air that is intentionally removed from a building?
• What does the infrared scanner in a boiler system contain?
• What is one of the main weaknesses of a gas turbine system?
• What does one compartment of a window air conditioner typically contain?
• What material are packing gland seals commonly made of?
• What is the main purpose of using flow switches in refrigeration systems?
• If a safety valve has a popping pressure of 250 psi, what is its equivalent in kPa?
• The fire point is described as the temperature at what condition?
• Which type of control is provided on a boiler with an automatic/manual selector switch?
• What type of service are three-way valves primarily associated with?
• What is a consequence of overcharging a refrigeration system?
• The pressure relief valve is typically installed on the boiler or reasonably close to the boiler outlet with:
• Which material is commonly used for indoor sanitary drainage piping in commercial buildings?
• In larger capacity refrigeration compressors, which valves should be operated prior to starting?
• When using the air washer for dehumidification, the spray water temperature must be:
• What does low voltage refer to in electrical controls?
• In the event of a fire in a commercial office building, what is the first action that staff should take?
• What value does the SI prefix "mega (M)" represent?
• What type of air do fans at the top of the induced draft cooling tower discharge?
• Where should the refrigeration system condenser pressure be in relation to the saturation pressure?
• What should be minimized in building air infiltration while still providing necessary fresh air?
• What describes a fraction where the numerator is greater than the denominator?
• What can cause premature bearing failure due to lubricant quality?
• Which of the following statements about measuring voltage is incorrect?
• What characteristic of lubricants is important for their effectiveness under pressure?
• What is the name of the furnace configuration where return air enters from the top and supply air leaves at the bottom?
• What benefit do electric systems provide in terms of operation?
• In the context of humidification, what is the main output of water vapor doing?
• What is the first step in the sequence of operations for a natural draft gas fired boiler?
• What is the unit of energy in the International System of Units (SI)?
• What is one of the main disadvantages of a central air conditioning system?
• What is the primary function of a blowers driving belt in a ventilation system?
• To safely open the drum vents after the fires are out, the boiler pressure should be approximately within what range?
• What is the most common fuel used for microturbines?
• What is one of the basic methods of ventilation?
• What is the reason oxygen should not be used to pressurize a refrigeration system for leak checking?
• What triggers a fire detector to respond?
• What is the function of the safety valve in a boiler system?
• What does the compressor do in a refrigeration system?
• What happens to ice as it loses temperature?
• What distinguishes 'regulations' from 'Acts' in terms of modifications?
• What is the second pressure controller used in the High-Low fire control method called?
• What is one significant advantage of electric boilers?
• Which of the following is an example of synthetic oils?
• One of the advantages of the crossflow mechanical draft tower over the counterflow tower is the ______________________ leading to lower energy costs.
• If the refrigerant is R-12 and the evaporator operates at -15°C (5°F) with a specific volume of 0.09102 m³/kg, what is the mass of refrigerant per minute for a volume compressed of 45.24 m³/h?
• What is the role of the thermostatic expansion valve in a refrigeration system?
• Lobe pumps are similar in function to which type of pumps?
• Which of the following is not a method used to start internal combustion generator sets?
• What is the primary function of firetubes in steel plate heating boilers?
• What characteristic describes the plug of a plug valve?
• Excessive water drift in a cooling water tower may be caused by all factors EXCEPT:
• What type of pump relies on the kinetic energy of a rotating impeller to move fluid?
• What problem do pressure relief devices effectively eliminate?
• When a worker requires a safety harness for entry from the top, how should the harness function?
• Which MSDS section contains information about handling and storage?
• The loss of heat from a substance will cause its temperature to drop. What is the term for the heat removed from the substance?
• What type of burner is classified as an air or steam atomizing burner?
• Which of the following types of fuel are generally used to fire a large steam generating unit?
• Refrigerants that are flammable and have low toxicity belong to which group?
• The operation of a system with fixed capacity nozzles is based on what cycle type?
• Which of the following refrigerants is likely to be included in a closed-cycle compression refrigeration system?
• If the warm air supply temperature exceeds 38°C (100°F) compared to the return air temperature, what could this indicate?
• What information will the "Boilers and Related Components" section of the B-51 code include?
• What is a disadvantage of using threaded pipe and screwed connections for joining lengths of piping?
• How do you calculate the percent increase of a spring that stretches from 12 cm to 15 cm?
• How many sections are typically found on a Material Safety Data Sheet?
• Which of the following is NOT a thermodynamic property of a refrigerant?
• How is velocity defined?
• How deep is the trap system designed to maintain its seal?
• What might restrict drainage and cause insufficient steam supply to heating units?
• What is NOT a typical cause of bearing trouble?
• Why must you avoid running a refrigeration system below 14 KPa when pumping down?
• What type of valve is best used when compressors are controlled by a thermostat?
• What does anti-foaming agent help prevent in an evaporative condenser?
• What information is NOT provided in Section 3 of the MSDS, Physical State?
• Which factor is critical when trying to achieve uniform combustion in a burner?
• What component regulates the flow of liquid refrigerant into the evaporator?
• What is the primary document that must be approved by the jurisdictional parliament?
• If a table has a surface area of 1140 in², what is its area in cm²?
• What must be done to piping threads before they are joined?
• What type of signal operates the solenoid valve in a refrigeration system?
• Which of the following is NOT included in emergency preparation for confined space entry?
• A centrifugal pump with high suction lift and negative casing pressure is likely to have what feature?
• What is a common characteristic of low temperature catalytic heaters?
• In the Canadian Standards Association B52-05 Mechanical Refrigeration Code, refrigerants are classified into how many groups based on toxicity and flammability?
• What happens to the refrigerant in the compression cycle when it exits the compressor?
• Which of the following features characterizes a complete lighting unit?
• Which area does NOT fall under the responsibilities of suppliers according to WHMIS?
• What role does the spring play in a mechanical seal?
• What is the thermal heat flow through a unit area of material commonly measured in?
• What water basin temperature is required for full water flow over the cooling tower fill during cold weather operation?
• What is the purpose of converting units in measurements?
• Which factor does NOT affect the performance of a refrigeration system?
• What is the maximum steam pressure recommended for a steam heated pan humidifier?
• What is generated when the hot junction of a thermocouple is heated?
• During operation, hot gases expand in which part of the microturbine system?
• How often should fans and blowers be cleaned and lubricated to ensure they operate properly?
• Vertical firetube boilers are advantageous when which condition is restricted?
• What occurs when the two-way pilot valve in the diaphragm gas valve is activated?
• What is refrigeration defined as?
• What is the advantage of using fins on a bare tube evaporator coil?
• What is an advantage of the forced circulation hot water heating system?
• Which principle does the low water fuel cut-off operate on?
• What does WHMIS stand for?
• What is FALSE regarding thrust bearings?
• Which boiler type eliminates a significant amount of refractory material?
• What pressure is the oil supplied to the burner mechanical atomizing nozzle?
• What typically results from poor maintenance of boiler components?
• What should be done when a refrigeration system is down for a prolonged period?
• What should be applied to male pipe threads before assembly?
• What is the primary purpose of lubricants in machinery?
• In a double-acting type of reciprocating compressor, where does compression and discharge occur?
• Which of the following represents a characteristic of all matter?
• Which property should oils intended for heat transfer use possess?
• What is a disadvantage of the quartz bulb electric infrared heating element?
• What is the purpose of allowing a small amount of leakage from the packing gland of circulating pumps?
• When a burner fails to ignite during the ignition trial period, what must be done before the boiler can be restarted?
• To convert horsepower to kilowatts, what is the approximate conversion factor?
• Which type of hot oil system heater is recognized for its efficiency?
• Which of the following scenarios would require a temperature relief device?
• What is true about packing in the stuffing box of a centrifugal pump?
• If a table has a surface area of 5568 cm², what is its area in square inches?
• What is the equivalent of 5 Imperial gallons in liters?
• In a compression refrigeration system, the pressure in the evaporator is maintained low by which component?
• What must all valves be properly identified with?
• Which materials are favored for wear rings due to their smooth wear characteristics?
• What does the coefficient of utilization (CU) of a lamp describe?
• The counterflow mechanical draft tower occupies less floor space than a crossflow tower but is ___________ for a given capacity.
• What is the role of flue gas baffles in bent tube boilers?
• Which hazard symbol is associated with Class D in WHMIS?
• The induced draft cooling tower has one or more fans located at the top of the tower that ______________ the downward flow of water.
• What type of outlets should be positioned to prevent cold drafts and maintain even room temperatures?
• In a centrifugal compressor, what is transformed into potential energy?
• Which of the following is NOT part of WHMIS training for employees?
• What is the risk of too much liquid refrigerant in the evaporator related to system components?
• Why is it not advisable to use black steel piping for drinking water systems?
• What property is important for the longevity of bearing performance?
• The maximum allowable pressure in a heating boiler ensures:
• Which of the following is NOT a method of controlling the refrigeration compressor output?
• What is the formula for finding the volume of a rectangle?
• What is the primary purpose of the ASME code?
• What does a relay consist of in electrical controls?
• If a warm air heating system is not providing sufficient heat, what could be a potential issue?
• Which component is essential in a compressor to manage the temperature of compressed air?
• What is the responsibility of the person assigned to attend a worker in a confined space?
• What regulates the output of an immersion electric boiler?
• Why is the presence of air in a steam heating system undesirable?
• What is essential to ensure when configuring an air washer system for maximum efficiency?
• What maintains high pressure in the condenser during refrigeration?
• Which component in electric boilers is crucial for preventing overheating?
• What does the coefficient of performance measure in refrigeration systems?
• Which of the following is NOT considered a contaminant suspended in the air?
• What can be a result of improper installation of pressure relief valves in boilers?
• Which type of pressure control in a heating boiler regulates maximum safe pressure?
• What is the role of fans in induced draft cooling towers?
• What is the main function of a boiler pressure relief valve?
• What symptom indicates a noisy compressor or system due to a dry or scored seal?
• At what temperature can activated carbon in an odour adsorber be reactivated to drive out adsorbed gases?
• What is the main advantage of foil bearings in microturbines?
• Cooling towers are commonly used when cooling water is scarce, expensive, and a temperature within __________________ of the ambient wet bulb temperature is required.
• In the HRT boiler, the hot combustion gases pass:
• What precaution should be taken when dealing with a worn impeller in a pump?
• What is the primary benefit of maintaining an air gap in potable water systems?
• How can ammonia leaks in refrigeration systems be detected?
• How many specific areas of information must the supplier label contain?
• How does one design of a refrigeration compressor cylinder unloader function?
• Which of the following gives the correct expression for D given the area A = 0.7854D²?
• Copper and copper alloys are known for their great resistance to which of the following?
• What does thermal resistance (R) represent?
• Which statement about rotating mechanical seals is false?
• The boiler firebox, gas passages and chimney should be thoroughly cleaned by:
• How long is the trial period before a lockout switch is energized if the pilot fails to ignite?
• Suppliers must provide which of the following to comply with WHMIS regulations?
• What component is not generally associated with an electric ignition system?
• Which of the following responsibilities does NOT fall under a building operator's duty for safety?
• Which ASME code contains recommended guidelines for the care of power boilers?
• When air temperature is lowered while moisture content remains constant, what happens to relative humidity?
• What is a major risk when working from ladders?
• Which factor is not typically associated with boiler operation safety?
• What is the maximum temperature for radiant panel heating in floors?
• What does the fire point of oil indicate?
• An immersion type electric boiler contains which of the following components?
• What type of circuit allows for both local and remote control of lights using relays?
• What is the unit of pressure in the SI system?
• What is one of the basic methods of ventilation?
• Low pressure hot water heating installations are limited to less than ___________ water pressure.
• What does purging a furnace involve?
• What types of operation may an actuator have?
• What does the thermostatic refrigeration controller produce when subjected to temperature fluctuations?
• Which refrigeration process component is primarily concerned with increasing the pressure of the refrigerant?
• What could excessive temperature lead to in bearings?
• What term is used to refer to the provinces and territories of Canada within legal documents?
• If for any reason, the burner should go out during normal operation, what must be done?
• Which of the following is not outlined by the National Building Code of Canada?
• What does the low oil sump temperature protection device ensure before the compressor starts?
• What is a noted disadvantage of gravity hot water heating systems?
• What is not an advantage of using a light-duty, low-voltage circuit to control relays?
• Fixed oils, also called fatty oils, are produced from all of the following except?
• For optimal operation, what must be considered in the feedback loop of a cooling system?
• What are boiler fittings?
• What is a requirement for all welding repairs on boilers according to provincial regulations?
• What is the result of simplifying the expression 42 - (6³ x 9²) + 32 - 16 x (4³ - 8²)?
• What is the average heating value of Natural Gas in kJ/m³?
• What is the primary use of liters in measurements?
• How are boilers in multiple boiler heating plants typically operated?
• What is the function of an actuator in control systems?
• What is indicated by air leaks in the suction line of a centrifugal pump?
• When pressure inside the Bourdon tube increases, what is the expected behavior of the tube?
• Which term is used to denote a comparison of a part to a whole in terms of 100?
• What term describes the fluid-to-solid change of state that occurs when heat is extracted?
• In the fuel gas system to a hot oil heater, what does the acronym PRV stand for?
• What characteristic should oils intended for heat transfer fluid have?
• What aspect of the efficiency of evaporative condensers is particularly crucial in certain environments?
• The humidification process primarily involves adding which element to the air?
• What does the latent heat removal in a cooling tower primarily occur through?
• What is one potential issue that can arise in a refrigeration system's condenser?
• Are electric boilers known for being noisy in operation?
• Under the WHMIS system, which of the following is not a responsibility of suppliers?
• What component is used to restrict flow from the condenser to the evaporator?
• What is the main function of a pipe siphon in a boiler?
• What is primarily found in the bellows of a remote bulb thermostat?
• What is the purpose of the condenser in a compression refrigeration system?
• In central or combined air conditioning systems, free cooling can be achieved when the supply air temperature for a building is:
• What identifies the classes of hazards in WHMIS?
• What is the primary benefit of flue gas passages in cast-iron sectional boilers?
• What is the minimum oxygen level that should not be exceeded in confined spaces?
• What is the "Boiler, Pressure Vessel and Pressure Piping Code" known as?
• What is a common safety issue associated with high-pressure boilers?
• How often must extinguisher shells used on foam fire extinguishers be hydrostatically tested?
• What other purpose does the CSA B-52 code serve besides safety?
• The rotary design of refrigeration compressors does not include which of the following?
• In a positive displacement pump, what happens to the fluid?
• Which component in a refrigeration system is responsible for storing refrigerant during charging?
• What should be taken into consideration when firing up a cold firetube boiler?
• What is the term for the constant distance from a point to the circumference of a circle?
• A heating boiler must have a permanently attached marker indicating:
• What is one of the general classes of traps based on their principle of operation?
• Seamless steel pipe is primarily used for which type of service?
• What is the primary cause of heating boiler failure?
• What does ASME stand for in relation to power engineering?
• According to the Life Safety Code, how long does it allow for a standby engine to start and provide power in medical areas?
• If the pilot burner fails to ignite, what occurs after a short period of startup?
• If there is an air lock after repairs have been made on the piping system, the operator should:
• Which action is taken to prevent excessive stresses in boiler metal from uneven expansion?
• Which device detects the flame in a natural draft gas fired boiler?
• At a pressure of 100 kPa absolute, how many litres of steam will 1 litre of water become?
• What is one main purpose of the CSA B-52 code?
• What safety device prevents the startup of a centrifugal refrigeration compressor?
• Which of the following is NOT a reason for using lubricants?
• The reduced pressure principal device consists of two independently acting check valves with an automatic operating _______________ valve located between the two check valves.
• Which of the below is a benefit of using a forced warm air heating system?
• Where should the boiler certificate of inspection be placed?
• What is a significant danger presented by below-ground work?
• What term is used for a chimney natural draft cooling tower?
• What is the formula for the area of a circle?
• The longitudinal drum boiler is classified as what type of combustion gas pass boiler?
• What property should oils used as heat transfer fluids in hot oil systems possess?
• Which section of the B-51 code identifies pressure vessels and their installation?
• Which system requires air to be moved at a low speed to maintain efficiency?
• If there is insufficient flow in the hot water system, a probable cause would be the:
• What type of connection is commonly used for joining sections of boilers?
• HRSG is the acronym for which of the following?
• A thermocouple consists of two dissimilar wires welded together at one end to form a:
• In a compression refrigeration system, where is the strainer typically placed?
• Which component is present in natural gas and occupies 10%-20% of its composition?
• What type of filter is best for removing fine dust, smoke, and fumes?
• What is the purpose of the gate valve in a boiler system?
• What describes potential energy (PE)?
• The switch in the operating control of a steam boiler is closed by which condition?
• What is one of the main components of an electric ignition system?
• For what purpose can clean steam be utilized?
• Centrifugal pumps can be divided into several types except which of the following?
• What characteristic feature helps a centrifugal pump function effectively?
• In a building heating system, where does the condensate in the condensate receiver tank come from?
• Refrigerants that are flammable and highly toxic belong to which group?
• What is the primary function of the evaporator in a refrigeration system?
• What should metal surfaces be painted with to protect them during damp conditions in the idle season?
• What temperature is typically required for sterilization in kitchens and laundries?
• What is the primary function of solenoid valves in boilers?
• What is one of the primary controls in a refrigerating system that regulates the liquid refrigerant flow?
• What is the value of 9 x 4?
• Why must centrifugal pumps be located close to or below the liquid surface?
• What organization meets annually to discuss important issues related to Power Engineers?
• Which type of humidification is not commonly used in residential settings?
• What is the maximum operating temperature that bearings can withstand?
• Which of the following is a main classification of refrigeration compressors?
• How are lubrication problems reduced in microturbines?
• Which heating system is most suitable for buildings with a concrete slab floor and no basement?
• In what applications can clean steam be utilized?
• Convection type oil heaters in a hot oil system typically have what efficiency?
• What is a key feature of electric boilers?
• How can you express R in terms of E and I based on the equation I = E / R?
• In boiler operation, what does overheating usually indicate?
• What is a disadvantage of the metal sheath electric infrared heating element?
• In addition to sterilization, where else may clean steam be utilized?
• In measuring area, which two dimensions are multiplied together?
• What type of evaporator operates through dry/direct expansion?
• Wall heaters can be classified as what type of heater?
• From where does warm air flow into the system that distributes air in a warming system?
• Viscosity is a measure of what property of oil?
• What is one of the main functions of lubrication?
• What is the hydrostatic testing interval for carbon dioxide fire extinguishers?
• During the condensation process in a compression refrigeration system, the high-pressure superheated vapor first gives up which type of heat?
• What percentage does the number 3 represent when compared to 25?
• How much greater are heat losses through large, single-pane window sections compared to ordinary walls?
• Which type of burner control is characterized as continuous adjustment of the fuel flow?
• Which component is NOT included on the low-pressure side of a compression refrigeration system?
• How many tonnes of refrigeration are produced when 251,244 kJ are removed in one hour?
• The sliding vane pump consists of all the following components except for which one?
• What process occurs from the warm convector cabinet surface?
• One of the methods employed to prevent backflow and control the cross connections is the:
• What is the advantage of using welded joints for piping compared to screwed or flanged connections?
• What type of trap is commonly used with radiators or convectors?
• If an electric motor is rated at 15 hp, what is its rating in kW?
• How does a water closet flush tank operate?
• What is a potential consequence of not addressing an overheated boiler?
• The sensing element of a remote bulb thermostat consists of which components?
• What is the common air velocity through a viscous filter?
• What kind of switch is typically used to prevent overheating in a heating boiler?
• In steel plate heating boilers, what is the purpose of the thin steel installed in the firetubes?
• What is the relative humidity of a sample of air that holds 0.014 kg of moisture at 21°C, with a maximum capacity of 0.015 kg?
• What group assures that all Power Engineer examinations conform to jurisdictional legislative requirements?
• What is the excess energy source used for vaporization in a compression refrigeration system?
• Ultrasonic motion detectors send out an inaudible tone, capable of __________.
• What is the primary function of a high-pressure float valve?
• What should an outdoor thermostat do to protect the snow melting system?
• How can the draft created by the fan be controlled?
• What arrangement is necessary for condensate removal in a steam heating system?
• Which chemical treatment is essential for a proper evaporative condenser program?
• Which component is essential for the operation of a serpentine watertube boiler?
• If a compressor discharge pressure gauge indicates 1120 kPa and the suction pressure is 70 kPa, what is the pressure ratio?
• Which of the following is not a component of a forced warm-air furnace?
• In cooling tower design, what is the primary factor in determining efficiency?
• What is a primary preventive measure to avoid slips and falls in an environment?
• Which factor listed affects the leakage tendency of a refrigerant?
• What type of oil problem can lead to bearing issues?
• What feature is generally not included in low-capacity unit heaters?
• What should workplaces do to comply with the WHMIS guidelines?
• Where are the electrodes located in an electrode type electric boiler?
• What is the function of the bellows in a thermal expansion valve?
• Through which valve is the pressurizing gas admitted to the refrigeration system?
• What is the condition of the refrigerant in the evaporator before it absorbs heat?
• At what water level will the low water level fuel cut-off shut off fuel to the heating boiler?
• Which issue can arise from cold drafts in a room?
• If the stuffing box bore on a pump is 63.5 mm and the shaft diameter is 50.8 mm, what size packing should be used?
• What is the conversion of 4 miles and 340 yards to kilometers?
• How is energy best defined?
• Which type of emergency lighting is required by the Life Safety Code for means of egress in educational and institutional occupancies?
• What is the maximum temperature for radiant panel heating in walls?
• Which element is critical in maintaining the efficiency of a refrigeration system?
• What is the purpose of the heat exchanger in a forced warm-air furnace?
• A larger residence in a hot summer area would not require which of the following for year-round conditions?
• Which component is NOT found in a simple closed-cycle compression refrigeration system?
• In a hot water heating boiler, what variable does the burner control sense?
• What happens to response time in a forced circulation hot water heating system compared to other systems?
• How many helical lobes does the male rotor in a helical screw compressor typically have?
• A class "C" fire involves combustion in which type of material?
• What is the product of the fractions 3/4 and 1/3?
• What type of compressor is classified as a centrifugal compressor?
• When does the combination pressure and temperature relief valve typically open?
• Which type of contaminant is most effectively removed by a charged-media air cleaner?
• What does priming of a centrifugal pump entail?
• On a hot water boiler, the highest value on the graduated scale of the pressure gauge shall not be less than ______ times the pressure at which the pressure relief valve is set.
• What is the function of the IPECC in power engineering?
• What is usually the cause of bearing trouble?
• What could be a reason for insufficient steam supply to heating units in a steam system?
• At what temperature does the temperature relief device typically open?
• What low voltage might electrical control systems use?
• What is the formula for calculating E when given P and I using the equation P = EI?
• Given the volume formula V = lwh, how do you solve for w?
• What type of particles are carried through the charged-media air cleaner and attracted to the filter media?
• What is the purpose of a damper in control systems?
• Temperature changes in the cooled medium are tracked by which control mechanism?
• From the equation A = 0.7854D², how can you isolate D?
• In one design of a mechanical trap, what is used to open and close the trap outlet valve?
• At what temperature should evacuation of the refrigeration system not be attempted?
• In a moderate climate, a small residence may only need a source of what for odour control?
• How much pressure is equivalent to one inch of water?
• The Steel plate heating boiler is classified as a _____ pass boiler.
• Which component is essential for reducing water loss in cooling towers?
• The principle behind kinetic energy involves:
• How old can an MSDS sheet be at maximum?
• In the case where the pump is below the source of supply, what is NOT required during priming?
• What type of boiler design is favored for maximizing space efficiency?
• Where can clear definitions for terms related to refrigeration be found?
• Which of the following is NOT an advantage of the venturi induced draft cooling tower?
• What is the symptom of a refrigeration system when the compressor discharge pressure is too low due to too much condenser water?
• Which type of condenser is classified as a commonly used one in refrigeration systems?
• Are boiler checks necessary in an automatic microturbine combined heating system?
• What temperature range must be maintained at the evaporator outlet for maximum efficiency?
• Which mathematical operation would you perform first in the order of operations?
• What is the main purpose of fins on a fin coil?
• Which of the following is NOT included in Section 4 of the MSDS, Fire and Explosion Data?
• Which compressor type requires the use of a shaft seal?
• What is the average heating value of bituminous coal?
• What happens to a fraction if you multiply its numerator or divide its denominator by a number?
• What is the primary function of a pump?
• Fire regulations and insurance requirements are primarily concerned with what aspect?
• When using compressed air to start an internal combustion generator set, what is a critical issue?
• Which of the following is usually a primary cause of bearing trouble?
• What is the typical temperature difference in a hot water heating system from the boiler outlet to the return connection?
• What tool is used to remove the burr left inside a pipe after cutting with a wheel and roller cutter?
• What are the two types of boiler combustion control?
• In which situations are evaporative condensers particularly advantageous?
• What is the primary purpose of a steam trap?
• What method do cast-iron boiler sections use to maximize heat transfer?
• What is a primary function of a balancing valve in heating systems?
• Which type of emergency lighting is required by the Life Safety Code for places of assembly with more than 1000 people?
• The regulations governing power engineering are more often overseen by a/an ___________ than by parliament.
• What does the term 'total head' refer to in a pumping system?
• What is the specific heat of water?
• What is the maximum diameter for which schedule 40 steel refrigeration piping may be used?
• Regardless of the type of air conditioning system, the air is mainly conditioned in a/an:
• What type of control can a controller provide for an actuator or relay?
• What is the service temperature limit of Calcium Silicate insulation?
• What type of movement does a basic ball valve require to go from fully open to fully closed?
• What is the minimum refrigerant quantity that requires a manual discharge valve in the event of an emergency?
• In a compression refrigeration system, the distributor is directly downstream from which component?
• To find the common denominator between two fractions, which of the following operations is NOT necessary?
• Which of the following situations most likely requires manual intervention to reset?
• During maintenance, which part of the boiler is crucial to inspect for leaks?
• The discharge piping from the relief valve should be piped to a safe point for disposal and can be:
• What shape does a plug valve consist of?
• How is specific heat defined in relation to 1 kg of a substance?
• What class of boiler incorporates a modular design for improved performance?
• Two main classifications of pumps are categorized as:
• What is the result when infrared heaters send out radiant energy to an opaque object?
• How can you derive the formula for P using E and I from the equation I = P / E?
• What can happen if unburned fuel collects in the furnace?
• Which ASME section is primarily concerned with new boiler construction?
• What is the service temperature limit of insulating cement?
• What is the primary use of a refrigerant?
• Which type of valve maintains a constant pressure in refrigeration applications?
• Vertical firetube boilers are advantageous when which of the following is limited?
• What temperature do combustion gases drop to when passed through a secondary exchanger?
• Which of the following would be considered a responsibility of an employer under WHMIS?
• In a warm air heating system, what could cause insufficient heat if the warm air supply temperature is excessively high?
• Which component of a water closet flush tank is responsible for opening the flush?
• How is an intermittent pilot ignited during operation?
• To avoid cavitation in the pump, the pressure at the highest point of the system should be at least equivalent to a head of water of:
• Where is the steam space located in a vertical firetube boiler?
• The ideal flash point for a safe fuel oil storage would be at what state?
• In which environment should paint be stored?
• What is the desirable range of humidity from a health standpoint?
• In a mechanical seal, which component typically remains stationary?
• What type of material is used for packing rings to reduce leakage around the pump shaft?
• What is one of the general classes of lubricants?
• Which action is essential for documenting boiler operation effectively?
• How can a pressure gauge be most accurately calibrated?
• Which section of the ASME code would you refer to for pressure vessel design standards?
• What color change indicates a leak in ammonia refrigeration systems when using wetted litmus paper?
• What type of air is used primarily in an air atomizing burner?
• Special diverter fittings were required in _________ hot water heating systems to ensure an adequate flow of water through each convector.
• What does a check valve prevent in piping systems?
• At what temperature should the blowdown valves be opened to drain the boiler?
• In electric heating systems, what aspect is typically highlighted as advantageous?
• Air separators used in hot water heating systems trap the air and direct it to the:
• How many USCS gallons are equivalent to 97 litres of gasoline?
• In the metric system, what does the prefix 'kilo-' represent?
• What is the simplification of the expression 6² ÷ (2² + 15 - 3 - [6 ÷ 2]) x 1 + 3³?
• What does a controller react to in control systems?
• A boiler in which steam is made at a pressure not greater than 103 kilopascals is termed a:
• What is 7/10 expressed as a percentage?
• What voltage should portable lamps used inside a boiler be limited to in order to eliminate electrocution risk?
• What does the radiator trap prevent from discharging?
• How many inches are equivalent to 24 centimeters?
• What is the role of the ignition transformer in the boiler startup sequence?
• Which of the following actions can help to improve the efficiency of a refrigeration system?
• To convert a decimal fraction to a common fraction, which term describes the nonzero portion of the decimal?
• What effect does increasing the pressure on the refrigerant have on the boiling point of a liquid?
• What is a significant disadvantage of the ball float trap?
• Which of the following best describes the purpose of WHMIS?
• Which term describes the general group of using electricity for comfort heating?
• The main parts of a refrigerant reciprocating compressor do not include which of the following?
• If the water level in a steam boiler is below the gauge glass, what should be the immediate action?
• Excess theoretical air can improve what aspect of combustion?
• What condition triggers the safety feature of a boiler to operate?
• What type of heat does the refrigerant vapour give up first in the condenser?
• The benefits of using low-voltage control circuits include which of the following?
• What is commonly overlooked during routine checks on a heating system?
• What type of lever has the fulcrum placed between the effort and the load?
• What is the primary way water extinguishes a fire?
• What is the standard unit of temperature measurement in the SI system?
• Why should short cycling of the compressor be avoided during the charging of the refrigeration system?
• Conduction heat gains are assumed to be equal to the temperature of which surface?
• What is the significance of the air receivers in the B-51 code?
• Which of the following uses a valve to control the discharge of water?
• Which term describes the necessary synchronization between a facility's generator and the utility's power supply?
• When should a complete check of the boiler heating system be performed?
• Three-way valves in hydronic heating systems are used for what purpose?
• In terms of energy transformation, the kinetic energy of the low-pressure, high-velocity vapor is transformed into what in the compressed vapor?
• What type of fans are typically used in induced draft cooling towers for operational efficiency?
• One of the advantages of the crossflow mechanical draft tower over the counterflow tower is the:
• What is the minimum graduation requirement for a pressure gauge installed on the high side of a refrigerating system?
• Which of the following additives is NOT typically used to improve the characteristics of lubricating oil?
• Which of the following is NOT a consequence of higher than normal head pressure?
• In a two-pipe direct return hot water heating system, how is water supplied to heating units?
• What process does a positive displacement compressor use to handle a charge of free air?
• What term describes the temperature above the flash point needed to sustain combustion?
• The single zone, constant air volume system is most similar to what?
• What will happen when the pressure in the boiler reaches the maximum allowable working pressure?
• What happens to water when it reaches its freezing point?
• How can mass be defined?
• What is a benefit of using multiple boilers in a heating plant?
• What is the correct safe working angle for a ladder when positioned?
• A larger residence, located in an area with colder winters, would require a more complex system to maintain satisfactory conditions year-round including all except:
• Which type of insulation has a service temperature limit of 150°C (302°F)?
• What aspect must the facilities alternator output match with that of the utilities system?
• A decimal fraction is a fraction that has what as a denominator?
• Which of the following is NOT a possible cause of a centrifugal pump not delivering enough liquid?
• For which type of pressure is threaded pipe and screwed connections generally used?
• What type of light do air sterilizers use to destroy bacteria and spores?
• What is the primary non-condensable gas that may leak into a refrigeration system?
• What is a common environmental concern related to many refrigerants?
• Which of the following is NOT typically a control found on heating boilers?
• What is the primary hazard of overcharging a refrigeration system?
• What is the minimum flow velocity required in horizontal piping to prevent blockage?
• What type of cycle is an operation of a system with fixed capacity nozzles controlled by?
• Why is the presence of air in a steam heating system undesirable?
• In a humidification system, the element used for moisture dispersion that maintains contact with the water surface is called?
• What does steam give up in the radiators, convectors, and coils?
• How does a natural draft ventilation system operate?
• What type of control is classified as operating or primary in refrigeration systems?
• What is the primary function of an impeller in a pump?
• What type of valve is used on gas and oil-fired boilers?
• What type of components are typically found in a compression refrigeration system?
• What is defined as the sum of static head and dynamic head in a pumping system?
• What type of valve is commonly used as a boiler stop valve?
• Which of the following contributes to creating a safe working environment?
• What type of valve is a backwater valve classified as?
• What should be avoided in the lubrication process to maintain optimal performance?
• What information is NOT required on the information card for refrigeration systems over 125 kW?
• What is a common issue that might lead to the failure of a boiler feed pump?
• What type of bearings does a microturbine primarily use to enhance performance?
• What is the Celsius equivalent of absolute zero on the Kelvin scale?
• What component is NOT part of an external gear pump?
• To reduce the effect of water hammer, suction and discharge lines of pumps are often equipped with which of the following?
• Infrared heating is a form of which type of heating?
• The inner walls and floors of certain heat systems are typically lined with what material?
• Flexible couplings are used to compensate for which issue?
• The operation of a thermostatic trap is dependent on the difference in what?
• In an ideal situation, the refrigerating effect of a refrigerant is equal to which of the following?
• What is power defined as?
• Which type of trap operates on a mechanical principle?
• What is the minimum gradient required for horizontal branch piping 76 mm (3 in) or less in diameter?
• Why is Babbitt material suitable for lining bearings?
• What is one of the main parts of a refrigerant reciprocating compressor that is not included in the following options?
• How far can a flat disc in a butterfly valve typically rotate?
• How was the crown sheet of a locomotive boiler secured?
• What is essential for the ignition of fuel in a furnace?
• What happens to the exhaust gas from the microturbine in a combined heating system?
• What is the term for the amount of air required beyond the theoretical air for complete combustion?
• A disadvantage of condensing boilers compared to customary boilers is:
• What can be cancelled out in the multiplication of two or more fractions?
• Which of the following is NOT an item to check in preparation for a confined space entry?
• Why is it crucial to close the stop valve in the return line?
• What happens to the fuel valve when the combustion air pressure drops too low?
• What is likely a disadvantage of using screwed connections in piping?
• What can cause insufficient steam supply if air vents are malfunctioning?
• Which type of compressor is most suitable for large-scale industrial applications?
• What is the effect of too much excess air in a combustion system?
• What is the main goal of training workers in a WHMIS program?
• Which of the following rules for writing SI symbols is incorrect?
• What is considered the "damaging factor" of an electrical circuit?
• In hot oil systems, what does the acronym FCV stand for?
• What is one disadvantage mentioned about the equipment for electric heating systems?
• What is a major component of a typical hot oil system?
• Which of the following is NOT an advantage of using electricity as a source of heat compared to other heating systems?
• How is a Confined Space defined?
• How many Imperial gallons are equivalent to 19 USCS gallons?
• What can high operating temperatures lead to in bearings?
• What indicates that a refrigeration system is short of capacity due to a clogged strainer?
• When does the thermal expansion valve work most efficiently?
• How is oil added to the refrigeration system while the compressor is operating?
• Infrared motion detectors are designed to respond to:
• What type of failure can excessive vibrations cause in bearings?
• What is the relative humidity if a sample of air holds 0.01 kg of moisture at 21°C when the maximum it can hold is 0.015 kg?
• Which component in a refrigeration system is responsible for absorbing heat?
• What condition must be met to ensure complete combustion of fuel in a furnace?
• What is the primary advantage of re-circulating hot water systems?
• Where should the high limit control of a steam heating boiler operate?
• To prevent flue gases from escaping, the spaces between cast-iron sections are:
• To ensure building safety, what practice should be regularly conducted?
• Which group is responsible for deciding the qualification criteria for Power Engineers?
• In a microturbine-driven alternator, which components are synchronized by a converter to meet electrical demand?
• What is a primary method for regulating airflow in combustion systems?
• What can result from the loss of bearing metal?
• What is the efficiency range of radiant type oil heaters in a hot oil system?
• What code contains recommended rules for the care of nuclear power plant boilers?
• What is a limitation of semi-solid lubricants (grease) during lubrication?
• Which of the following best describes kinetic energy?
• Which of the following applications is unsuitable for a plug valve?
• Which boiler item is essential to check monthly for proper operation?
• Why must air present in steam lines and equipment be removed?
• Which of the following base units includes a prefix?
• What is the primary purpose of filters in a forced warm air system?
• In the relationship P = EI, how would you express I if you have E and P?
• Which of the following is a document for standards in the design of pressure piping?
• What type of vapor condition occurs when the vapor’s temperature is higher than the saturation temperature?
• What is the "Mechanical Refrigeration Code" referred to as?
• Under what condition may hot oil coke in the heater tubes?
• What is the leakage of outdoor air into a building through cracks and openings called?
• What does the compressor in a refrigeration system primarily draw from the evaporator?
• What type of heating element does the quartz tube electric infrared heating element use?
• How many terminals does a 2-pole or double pole switch have for connection to wires?
• What is an essential function of the alternator in a microturbine system?
• Boiler explosions are classified into which two general categories?
• How many hazard classes does WHMIS consist of?
• What is required for a facilities fire pump?
• How many drums does an "A" type boiler typically have?
• What is the basic unit for measuring time?
• Which of the following is NOT a possible cause of low water level in a boiler?
• What is the term for the formula used to determine the area of a circle?
• What causes faucet noises such as "chattering" or "whistling"?
• Which type of humidifier is commonly used for residential purposes?
• Which advantage does a forced warm air heating system provide for air quality?
• What are the vertical pipes that transport steam to various floors in a heating system commonly called?
• Shell, sleeve, or journal bearings typically have what kind of lining?
• What role does superheat play in a refrigeration system?
• Soft-solder fittings can only be used in refrigeration piping for tubing of what outer diameter or smaller?
• What does the diaphragm gas valve do on shutdown?
• Piping in hot oil systems that is 25.4 mm (1 in) in diameter or smaller should be classified as which schedule?
• Which type of piping cannot be used for potable water lines?
• What is the symptom of a refrigeration system when the compressor loses oil due to leaking joints or fittings on the crankcase?
• Small capacity heating boilers operate most efficiently at:
• What is the typical voltage used in many home electrical systems?
• What is a primary benefit of using a steam heated pan humidifier with a modulating control valve?
• Which type of heating device is considered the most efficient?
• Which of the following is a common type of pump used for transferring liquids?
• What is the constant temperature at which terminal reheat systems supply air?
• In terms of thermal energy, what does specific heat dictate?
• What component works to maintain the seal in a plumbing trap?
• What is the primary component of air?
• What should not be done without determining the location of and repairing a system leak?
• What is the primary unit of measurement for a single dimensional object?
• An air gap is defined as a separation between what two entities?
• What happens when a steam trap leaks?
• The suction pressure of a compressor is vital for which part of the refrigeration cycle?
• Which of the following is an advantage of a forced warm air heating system?
• How does a forced warm air heating system primarily distribute heat?
• Which of the following is a disadvantage of using a face damper for evaporator capacity control?
• To what height in metres must a tank be built to store 27.3 kL of liquid if the base is 4 m by 4.2 m?
• What must be corrected if the water in the gauge glass of a steam boiler is too high?
• At what speed should air be moved through dry filters?
• From where does heat energy always move?
• What piping size characteristic relates to gravity hot water heating systems?
• If the amount of air in excess of the theoretical air is 6 kg, what percentage does it represent?
• What is a disadvantage of atomizing humidifiers?
• Which condition can cause damage when a firetube boiler is heated too quickly?
• What is the basic unit for measuring length?
• What is the appropriate angle for horizontal branch connections to the discharge stack?
• What condition may occur due to poor air control in steam heating systems?
• What is used to change and control the opening of valves?
• What percentage of oxygen is found in the atmosphere?
• Valve packing surrounds which part of a valve?
• Which type of refrigeration system is classified as a closed cycle mechanical refrigeration system?
• Where is the thermostat located in a direct type of temperature-actuated refrigeration control?
• Sealed antifriction bearings typically do not need additional lubrication for how many years?
• How is the Actual Mechanical Advantage (AMA) calculated?
• Which practice is crucial for minimizing injury while working?
• How is efficiency often measured in mechanical systems?
• What does the term 'latent heat' refer to?
• What are installed in branch ducts near their takeoff point on the plenum to adjust warm airflow for equal comfort conditions?
• The Material Safety Data Sheet contains information in how many specific areas?
• Is it true that a low percentage (15%) of the energy delivered by electricity is absorbed as heat in the boiler?
• What should be done if the surrounding air temperature is below 20°C during evacuation?
• What is necessary before tightening the nuts on a boiler gauge glass?
• What is the total surface area in square metres of a closed cylinder that is 5 m high and 5 m in diameter?
• Which of the following refrigerants is known to be not miscible with oil?
• In a multi-zone hot water heating system, how are heating units organized?
• A common type of water heater that incorporates an automatic gas-fired storage heater and features a single tank used for both heating and storing the water is the:
• Which measurement is associated with the term 'heating boiler'?
• How do gate valves operate in relation to the path of flow?
• What are the regulations associated with an Act meant to enforce?
• What is the result of simplifying the expression (42 + 6) x 9 - 32 + 16 ÷ 4 - 8?
• Which symbol indicates a quantity of 1,000,000 in the SI system?
• How is the outdoor air quality necessary for ventilation often measured?
• What is one key feature of packaged watertube boilers?
• Which component does the capillary tube connect in a refrigeration system?
• What does the distributor ensure in a direct-expansion compression refrigeration system?
• The highest pressure on the pressure gauge of a hot water boiler is set to _____ times the pressure relief valve.
• What does torque measure?
• Who is legally allowed to perform welding on pressure parts of a boiler?
• What is added to lubricants to prevent the formation of acids due to oil oxidation?
• Which refrigerant classification denotes the highest safety level?
• What is the service temperature limit of Foamed Plastic insulation?
• What is a common method used to ensure the safety of power engineering operations?
• What is essential for maintaining efficient operation in a multi-zone heating system?
• What is the function of the male rotor in a rotary screw compressor?
• Relative humidity is best defined as which of the following?
• What is the service temperature limit for Glass Fibre insulation?
• What occurs to the temperature of a liquid when heat is added during a phase change?
• Which substance does a steam trap primarily discharge from steam lines and equipment?
• How do you calculate the lateral surface area of a cylindrical tank that is 3 m in diameter and 12 m long?
• What pressure is a single-stage centrifugal compressor typically capable of compressing atmospheric air to?
• Which of the following is NOT a property of matter?
• What is a purpose of the CSA B52 code?
• After the air is heated in the heat exchanger section, it leaves the furnace via which component?
• Which device is used to control the action of valves in a heating system?
• What is the maximum temperature for an infrared scanner mounted on the end of a sighting tube?
• What should NOT be done when an elevator stops between floors?
• How can you express R in terms of A when using the area formula A = πR²?
• What is the function of a Material Safety Data Sheet (MSDS)?
• What should be done to the stop valve in the return line of a boiler when the outlet stop valve is closed?
• Most plumbing fixtures need a minimum of ____________ water flow pressure.
• During the operation of a forced draft cooling tower, which of these statements is NOT true?
• Which of the following properties affects how a refrigerant interacts with other substances in the system?
• In the compression refrigeration system, what is the role of the evaporator?
• How are cast-iron sectional boilers held together?
• What is a common issue related to insufficient refrigerant in the evaporator?
• In a refrigeration system with a high-pressure float, where is the refrigerant stored?
• What term describes the vertical distance from the water source to the water surface in the discharge tank?
• What type of handle design must the valve to the pressure gauge on a hot water boiler have?
• What is a potential outcome of inadequate maintenance of fans and blowers in a heating system?
• What type of air compressor is categorized as dynamic?
• What symptom might suggest that the compressor discharge pressure is too high due to improper operation of the evaporative condenser?
• What design feature is important for ensuring minimal water drift in a cooling tower?
• If a stored pressure fire extinguisher cartridge is how much below the stamped weight, should it be replaced?
• Why is it important to monitor the temperature of water in a boiler system?
• In power engineering definitions, what is meant by 'heating surface'?
• Refrigerants that are highly flammable and highly toxic belong to which group?
• What determines the classification of the certificate of competency for the role of chief power engineer?
• Which two Canadian codes are important to the Fifth Class Power Engineer?
• According to typical Occupational Health and Safety Regulations, which condition is NOT required for confined space entry?
• How should the admission of fresh air into a room be managed to ensure comfort?
• The flash point is defined as what temperature related to fuel oil?
• What is the boiling temperature of R-22 (Freon 22) at atmospheric conditions?
• Which of the following is NOT considered an important physical property of a refrigerant?
• What is the formula for finding the area of a rectangle?
• The action of bringing dye penetrant, entrapped in a crack, to the surface is accomplished by which process?
• Which of the following is essential information typically included in a Material Safety Data Sheet?
• Which property of refrigerants indicates their ability to dissolve in oil?
• What is the normal temperature limit for water in a hot water heating system with an open expansion tank?
• If oil has a low viscosity index (VI), what does it indicate about the oil's viscosity?
• What happens to the main gas valve after the flame is detected?
• What is the specific heat of ice?
• Which of the following is critical for building safety?
• What are the pressure and temperature limits for steam heating boilers?
• What is the service temperature limit of Mineral Fibre insulation?
• What is the name given to the component that coordinates and sequences the boiler operation?
• What is a common reason for a warm air heating system to not function effectively?
• Which type of fire is classified as a class "B" fire?
• Which of the following best describes the context of the term 'heating surface' in boilers?
• What is another advantage of the forced circulation hot water heating system?
• Which of the following is NOT an important physical property of a refrigerant?
• Which component is activated to ignite the pilot gas valve in a natural draft gas fired boiler?
• Which statement regarding stationary mechanical seals is false?
• Which ASME code sections are most pertinent to the Fifth and Fourth class Power Engineer?
• How is vertical adjustment of a roller stand achieved?
• In a steam heating system, how must the piping and heating units be arranged?
• Hydrostatic testing of a boiler requires raising the pressure to what level in relation to the Maximum Allowable Working Pressure?
• A hot water heating system, also known as a ________ heating system, is similar in many respects to a steam heating system.
• What issue can arise from soot build-up on boiler tubes?
• A machined and slightly tapered piece of pipe found in cast-iron sectional heating boilers is referred to as a:
• When dividing fractions, which of the following is the first step?
• During annual inspections, what should be checked in hot oil heater tubes?