HVAC Test Questions And Complete
Solutions
You are the refrigeration engineer running a 2000 - ton centrifugal
refrigeration system. The system supplies chilled water to a college campus
with multiple buildings. You have normal chilled water load about 1800 tons
when the refrigeration system suddenly stops and shuts down. The panel
display on the refrigeration system indicates that the problem is with the
water flow. of the following, which immediate action would be best? - -check
the condenser water pump and re-start the refrigeration system
- The sole refrigeration engineer on duty in a building is permitted to leave
the building when the refrigeration system is in operation only when? - -
relieved by another licensed refrigeration engineer
- This is a reciprocating compressor using R-22 refrigerant. Identify the
object contained in the red box, explain the purpose of it? - -oil charging
port, allows for the addition and removal of oil from the compressor
- In most semi-hermetic compressors, the suction vapor is used to? - -cool
the motor
- 2.5 Gallons of water equals what? - -2.5 gallons of water weighs 20.8
pounds
- Regarding the functioning of a steam turbine, why is it advisable to keep
the moisture in the inlet steam as low as possible? - -keeps turbine blade
wear to a minimum
- A rooftop water cooling tower is connected to a water pump in the building
basement with a 12 inch diameter pipe. With the pump turned off, a pressure
gauge at the pumps inlet shows a pressure of 140 psi. The height of the
column in feet would be closest to: - -323
- You are an engineer running a 2000-ton ( steam-driven turbine )
centrifugal refrigeration system. The refrigeration system supplies chilled
water to a college campus with multiple buildings.
During the course of making your rounds, you check the 9-cell cooling tower
on the roof. You note that the water level in all of the cooling tower cells is
very low.
Which of the following immediate actions would you take? - -add additional
make up water to the cooling tower
Solutions
You are the refrigeration engineer running a 2000 - ton centrifugal
refrigeration system. The system supplies chilled water to a college campus
with multiple buildings. You have normal chilled water load about 1800 tons
when the refrigeration system suddenly stops and shuts down. The panel
display on the refrigeration system indicates that the problem is with the
water flow. of the following, which immediate action would be best? - -check
the condenser water pump and re-start the refrigeration system
- The sole refrigeration engineer on duty in a building is permitted to leave
the building when the refrigeration system is in operation only when? - -
relieved by another licensed refrigeration engineer
- This is a reciprocating compressor using R-22 refrigerant. Identify the
object contained in the red box, explain the purpose of it? - -oil charging
port, allows for the addition and removal of oil from the compressor
- In most semi-hermetic compressors, the suction vapor is used to? - -cool
the motor
- 2.5 Gallons of water equals what? - -2.5 gallons of water weighs 20.8
pounds
- Regarding the functioning of a steam turbine, why is it advisable to keep
the moisture in the inlet steam as low as possible? - -keeps turbine blade
wear to a minimum
- A rooftop water cooling tower is connected to a water pump in the building
basement with a 12 inch diameter pipe. With the pump turned off, a pressure
gauge at the pumps inlet shows a pressure of 140 psi. The height of the
column in feet would be closest to: - -323
- You are an engineer running a 2000-ton ( steam-driven turbine )
centrifugal refrigeration system. The refrigeration system supplies chilled
water to a college campus with multiple buildings.
During the course of making your rounds, you check the 9-cell cooling tower
on the roof. You note that the water level in all of the cooling tower cells is
very low.
Which of the following immediate actions would you take? - -add additional
make up water to the cooling tower
