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MRAC
MRAC Set-1
Direct Expansion Air Conditioning
24

Direct Expansion Air Conditioning MCQ with Answers

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

Direct Expansion Air Conditioning MCQ with Answers

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Related Direct Expansion Air Conditioning MCQ with Answers

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

27) Which parameters in log sheet indicate the air blocking in ducts?

All grille temperatures

Liquid line temperature

Inlet and outlet temperature of chillier

Temperatures in chilled water system

Answer is:

All grille temperatures

28) What is the effect on system performance if the AC system is at undercharged condition?

Poor cooling

Excess cooling

Compressor over loading

Compressor trips by HP cut out

Answer is:

Poor cooling

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