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MRAC Set-1
Direct Expansion Air Conditioning
22

Direct Expansion Air Conditioning MCQ with Answers

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

Direct Expansion Air Conditioning MCQ with Answers

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Related Direct Expansion Air Conditioning MCQ with Answers

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

25) Which valve is used to release the non condensable gases from AC plant?

Purge valve

Check valve

Service valve

Solenoid valve

Answer is:

Purge valve

26) What is the reason for short cycling of LP control switch in AC plant?

Excess of water flow

Excess of refrigerant

Shortage of water flow

Shortage of refrigerant

Answer is:

Shortage of refrigerant

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