4B POWER ENGINEERING UPDATED
ACTUAL QUESTIONS AND CORRECT
ANSWERS EXAM SCRIPT
●● Lifting levers with depreciate overtime unless a good?
Answer: Maintenance Plan
●● Hot water heating boilers with fully modulating burners require?
Answer: Modulating temp control
●● When starting up a steam heating boiler it should be filled to?
Answer: Above the LWCO (Low water cut off) but below normal
operating level
●● Conduction heat gains are calculated on the assumption that?
Answer: Solar heat gains are not included
●● What lithium bromide solution has the ability to absorb water vapour
readily?
Answer: Strong Solution
●● What is the purpose of sodium zeolite softeners?
,Answer: To remove the magnesium and calcium from water
●● When steam is used to correct humidity, what type of heat in the air
is increased?
Answer: Sensible and Latent heat
●● What are 2 characteristics of reciprocating pumps?
Answer: 1. They are high pressure pumps
2. They should be started with suction and discharge open
●● What is true about dissolved solids in raw water?
Answer: They cannot be captured by filters
●● What is the angle the base of a ladder should be inclined at when
vertically supported?
Answer: 1/4 of the ladder length
●● How often are standby feed water pumps ran?
Answer: Weekly
●● What tool would you selected to shear old bolts or split nuts?
Answer: Flat chisel
,●● During a boiler shutdown, why is the steam drum vent is opened at
approximately 35 KPA?
Answer: To prevent vacuuming from occurring inside the boiler
●● When inspecting a dismantled bearing, what is the first indication of
a failing bearing?
Answer: Roughness when rolling
●● What can copper sulphate be used as?
Answer: A marking material
●● What is a common issue of steam coils with long tube length?
Answer: Have greater freezing problem at temperatures around -2° to -
1°
●● What affect does an inhibitor have when added to acid?
Answer: It minimizes the affect acid has on metals
●● Portable hot water heaters must have 1 of 3 valves, What are they?
Answer: 1. Safety relief valve
2. Temperature relief valve
3. Pressure relief valve
, ●● What PH should boiler water be maintained at?
Answer: 10.5
●● Water contained in the airstream at the discharge of a cooling tower
is removed by using?
Answer: Drift Eliminators
●● Why do safety valves "pop" open?
Answer: The forced of steam is suddenly increased due to a large area
●● What is the PH of a steam boiler that is layed up on standby?
Answer: 10
●● What can be done to prevent the pitting of a boiler?
Answer: Heating up the boiler feed water in the deaerator
●● Where are combustion air safety switches commonly found?
Answer: They are found on boilers using forced draft fans
●● What heat is used to change the state of a substance?
Answer: Latent heat
ACTUAL QUESTIONS AND CORRECT
ANSWERS EXAM SCRIPT
●● Lifting levers with depreciate overtime unless a good?
Answer: Maintenance Plan
●● Hot water heating boilers with fully modulating burners require?
Answer: Modulating temp control
●● When starting up a steam heating boiler it should be filled to?
Answer: Above the LWCO (Low water cut off) but below normal
operating level
●● Conduction heat gains are calculated on the assumption that?
Answer: Solar heat gains are not included
●● What lithium bromide solution has the ability to absorb water vapour
readily?
Answer: Strong Solution
●● What is the purpose of sodium zeolite softeners?
,Answer: To remove the magnesium and calcium from water
●● When steam is used to correct humidity, what type of heat in the air
is increased?
Answer: Sensible and Latent heat
●● What are 2 characteristics of reciprocating pumps?
Answer: 1. They are high pressure pumps
2. They should be started with suction and discharge open
●● What is true about dissolved solids in raw water?
Answer: They cannot be captured by filters
●● What is the angle the base of a ladder should be inclined at when
vertically supported?
Answer: 1/4 of the ladder length
●● How often are standby feed water pumps ran?
Answer: Weekly
●● What tool would you selected to shear old bolts or split nuts?
Answer: Flat chisel
,●● During a boiler shutdown, why is the steam drum vent is opened at
approximately 35 KPA?
Answer: To prevent vacuuming from occurring inside the boiler
●● When inspecting a dismantled bearing, what is the first indication of
a failing bearing?
Answer: Roughness when rolling
●● What can copper sulphate be used as?
Answer: A marking material
●● What is a common issue of steam coils with long tube length?
Answer: Have greater freezing problem at temperatures around -2° to -
1°
●● What affect does an inhibitor have when added to acid?
Answer: It minimizes the affect acid has on metals
●● Portable hot water heaters must have 1 of 3 valves, What are they?
Answer: 1. Safety relief valve
2. Temperature relief valve
3. Pressure relief valve
, ●● What PH should boiler water be maintained at?
Answer: 10.5
●● Water contained in the airstream at the discharge of a cooling tower
is removed by using?
Answer: Drift Eliminators
●● Why do safety valves "pop" open?
Answer: The forced of steam is suddenly increased due to a large area
●● What is the PH of a steam boiler that is layed up on standby?
Answer: 10
●● What can be done to prevent the pitting of a boiler?
Answer: Heating up the boiler feed water in the deaerator
●● Where are combustion air safety switches commonly found?
Answer: They are found on boilers using forced draft fans
●● What heat is used to change the state of a substance?
Answer: Latent heat
