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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
During cooling and dehumidification, dry bulb temperature

None of these
Increases
Decreases
Remains constant

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Refrigeration and Air Conditioning
Air refrigerator works on

Reversed Carnot cycle
None of these
Both (A) and (B)
Bell Coleman cycle

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Refrigeration and Air Conditioning
The boiling point of ammonia is

-77.7°C
-30°C
-10.5°C
-33.3°C

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Refrigeration and Air Conditioning
The operating pressure for refrigerating units using R-12 as a refrigerant is

8 bar
30 bar
2 bar
15 bar

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Refrigeration and Air Conditioning
Superheating in a refrigeration cycle

Other factors decide C.O.P
Increases C.O.P
Decreases C.O.P
O.P remains unaltered

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Refrigeration and Air Conditioning
The humidity ratio or specific humidity is the mass of water vapour present in

1 m3 of wet air
1 m3 of dry air
1 kg of dry air
1 kg of wet air

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MORE MCQ ON Refrigeration and Air Conditioning

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