Power Engineering 4B Review Questions With Complete
Solutions
c
Air washers, used in HVAC systems, cannot:
Select one:
a. Heat the air
b. Cool the air
c. Remove tobacco smoke
d. Dehumidify the air
b
One of the advantages of a common exhaust duct system used
for ventilation in a large building is:
Select one:
a. The building can be kept odour-free
b. There is only one fan to maintain
c. There is no fan to maintain
d. The building can be maintained at a slight negative pressure at
all times
d
The external inspection of a boiler:
Select one:
a. may include making sure the furnace refractory is in order
b. may include making sure the exterior of the tubes are in good
condition
c. must be done after the boiler has been drained
,d. may include ensuring the pressure relief valves are the correct
setting and capacity
a
Between a valve and a pushrod, there is a
Select one:
a. rocker arm
b. wrist pin
c. camshaft
d. connecting rod
d
In cooling towers, sacrificial anodes work by
Select one:
a. neutralizing acidic compounds.
b. interfering with the formation of corrosive reaction products.
c. plating the metal parts with non-corrosive metal ions.
d. corroding, instead of the metal cooling tower parts
c
The type of pump normally used with a hot oil system is a:
Select one:
a. Sliding vane pump
b. Rotary screw pump
c. Conventional, single stage centrifugal pump
d. Multistage reciprocating pump
b
Which of the following statements describes Total Pressure?
Select one:
,a. Velocity Pressure - Static Pressure
b. Velocity Pressure + Static Pressure
c. Atmospheric Pressure + Static Pressure
d. Static Pressure - Velocity Pressure
c
The safety head of a refrigeration compressor is designed to:
Select one:
a. Take the place of a safety relief valve
b. Prevent damage due to freeze-up
c. Relieve pressure due to liquid in the cylinder
d. Unload cylinders ifover-loaded
a
One of the main purposes of an external boiler inspection is to:
Select one:
a. observe and assess boiler operation and maintenance
practices.
b. inspect all auxiliary equipment and pressure vessels.
c. thoroughly assess the water treatment program.
d. thoroughly examine the boiler waterside.
b
The primary function of a burner management system is to:
Select one:
a. Regulate the air flow and the fuel flow in accordance with
steam demand.
b. Start or stop a burner following a safe sequence
, c. Maintain the air-fuel ratio of the burner
d. Alert the operator of adverse operating conditions
b
When differential pressure is used to measure water level in a
boiler steam drum, the differential pressure is:
Select one:
a. Greatest when drum level is high
b. Greatest when drum level is low
c. Greatest when steam pressure is low
d. Least when drum level is low
a
) Moisture in a refrigeration system will NOT cause
Select one:
a. Excessive high-side pressures.
b. The deterioration of the motor insulation of a hermetic
compressor.
c. Acid formation inside the refrigeration system.
d. The formation of ice inside the refrigeration system.
b
The component used to to prevent wasting steam through a
deaerator vent is a:
Select one:
a. Scrubber
b. Vent condenser
c. Cyclone separator
d. Chevron drier
Solutions
c
Air washers, used in HVAC systems, cannot:
Select one:
a. Heat the air
b. Cool the air
c. Remove tobacco smoke
d. Dehumidify the air
b
One of the advantages of a common exhaust duct system used
for ventilation in a large building is:
Select one:
a. The building can be kept odour-free
b. There is only one fan to maintain
c. There is no fan to maintain
d. The building can be maintained at a slight negative pressure at
all times
d
The external inspection of a boiler:
Select one:
a. may include making sure the furnace refractory is in order
b. may include making sure the exterior of the tubes are in good
condition
c. must be done after the boiler has been drained
,d. may include ensuring the pressure relief valves are the correct
setting and capacity
a
Between a valve and a pushrod, there is a
Select one:
a. rocker arm
b. wrist pin
c. camshaft
d. connecting rod
d
In cooling towers, sacrificial anodes work by
Select one:
a. neutralizing acidic compounds.
b. interfering with the formation of corrosive reaction products.
c. plating the metal parts with non-corrosive metal ions.
d. corroding, instead of the metal cooling tower parts
c
The type of pump normally used with a hot oil system is a:
Select one:
a. Sliding vane pump
b. Rotary screw pump
c. Conventional, single stage centrifugal pump
d. Multistage reciprocating pump
b
Which of the following statements describes Total Pressure?
Select one:
,a. Velocity Pressure - Static Pressure
b. Velocity Pressure + Static Pressure
c. Atmospheric Pressure + Static Pressure
d. Static Pressure - Velocity Pressure
c
The safety head of a refrigeration compressor is designed to:
Select one:
a. Take the place of a safety relief valve
b. Prevent damage due to freeze-up
c. Relieve pressure due to liquid in the cylinder
d. Unload cylinders ifover-loaded
a
One of the main purposes of an external boiler inspection is to:
Select one:
a. observe and assess boiler operation and maintenance
practices.
b. inspect all auxiliary equipment and pressure vessels.
c. thoroughly assess the water treatment program.
d. thoroughly examine the boiler waterside.
b
The primary function of a burner management system is to:
Select one:
a. Regulate the air flow and the fuel flow in accordance with
steam demand.
b. Start or stop a burner following a safe sequence
, c. Maintain the air-fuel ratio of the burner
d. Alert the operator of adverse operating conditions
b
When differential pressure is used to measure water level in a
boiler steam drum, the differential pressure is:
Select one:
a. Greatest when drum level is high
b. Greatest when drum level is low
c. Greatest when steam pressure is low
d. Least when drum level is low
a
) Moisture in a refrigeration system will NOT cause
Select one:
a. Excessive high-side pressures.
b. The deterioration of the motor insulation of a hermetic
compressor.
c. Acid formation inside the refrigeration system.
d. The formation of ice inside the refrigeration system.
b
The component used to to prevent wasting steam through a
deaerator vent is a:
Select one:
a. Scrubber
b. Vent condenser
c. Cyclone separator
d. Chevron drier
