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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is___ dry bulb temperature.

Lower than
Same as
None of the listed here
Higher than

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Refrigeration and Air Conditioning
The boiling point of ammonia is

-10.5°C
-30°C
-77.7°C
-33.3°C

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Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m²/h
m²/hK
m/h
m/hK

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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 central air conditioning system has ___________ overall efficiency as compared to individual systems.

Higher
Lower
None of these
Same

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Refrigeration and Air Conditioning
In larger industrial and commercial reciprocating compression systems, refrigerant widely used is

Carbon dioxide
Sulphur dioxide
R-12
Ammonia

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MORE MCQ ON Refrigeration and Air Conditioning

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