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Study MCQ
Refrigeration and Air Conditioning Technician
DIRECT EXPANSION AIR CONDITIONING
Set 5
Set 5
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Q9941
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How the indoor unit acts during heating cycle of heat pump?
A
Condenser
B
Evaporator
C
Expansion device
D
Electrical heater
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What is the purpose of evacuating the system before gas charging?
A
Flush oil particles
B
Charge refrigerant
C
Remove refrigerant
D
Remove moisture and non-condensable
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Which process is done to remove the oil and other impurities from the condenser tubes?
A
Purging
B
Flushing
C
Evacuation
D
Pressurising
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Which valve is first closed to start the pump down operation in central AC plant?
A
Receiver inlet valve
B
Receiver outlet valve
C
Suction service valve
D
Discharge service valve
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Which valve is used to release the non condensable gases from AC plant?
A
Purge valve
B
Check valve
C
Service valve
D
Solenoid valve
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