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MRAC Set-1
Direct Expansion Air Conditioning
20

Direct Expansion Air Conditioning MCQ with Answers

20) Which refrigerant is used with VRF AC system?

R 11

R 12

R 502

R 410A

Answer is:

R 410A

Direct Expansion Air Conditioning MCQ with Answers

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Related Direct Expansion Air Conditioning MCQ with Answers

21) How the indoor unit acts during heating cycle of heat pump?

Condenser

Evaporator

Expansion device

Electrical heater

Answer is:

Condenser

22) What is the purpose of evacuating the system before gas charging?

Flush oil particles

Charge refrigerant

Remove refrigerant

Remove moisture and non-condensable

Answer is:

Remove moisture and non-condensable

23) Which process is done to remove the oil and other impurities from the condenser tubes?

Purging

Flushing

Evacuation

Pressurising

Answer is:

Flushing

24) Which valve is first closed to start the pump down operation in central AC plant?

Receiver inlet valve

Receiver outlet valve

Suction service valve

Discharge service valve

Answer is:

Receiver outlet valve

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