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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m/hK
m²/h
m/h
m²/hK

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Refrigeration and Air Conditioning
The leakage in a refrigeration system using ammonia is detected by

Halide torch
Soap and water
Sulphur sticks
All of these

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Refrigeration and Air Conditioning
Refrigeration in aeroplanes usually employs the following refrigerant

Air
Freon-11
CO2
Freon-22

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Refrigeration and Air Conditioning
The heat rejection factor (HRF) is given by

1 - C.O.P.
1 - (1/C.O.P)
1 + C.O.P
1 + (1/C.O.P)

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Refrigeration and Air Conditioning
The wet bulb depression indicates _________ humidity of the air.

Relative
Absolute
None of these
Specific

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Refrigeration and Air Conditioning
One tonne of refrigeration (1TR) means that the heat removing capacity is

420 kJ/min
210 kJ/min
620 kJ/min
21 kJ/min

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MORE MCQ ON Refrigeration and Air Conditioning

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