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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of C.O.P. of reversed Carnot Cycle?

0.25
1.25
0.5
0.8

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Refrigeration and Air Conditioning
The mass of water vapour present in __________ is called absolute humidity.

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

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Refrigeration and Air Conditioning
The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called

Degree of saturation
Relative humidity
Humidity ratio
Absolute humidity

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Refrigeration and Air Conditioning
Carbon dioxide is

Colourless
Non-flammable
Odourless
All of the listed here

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Refrigeration and Air Conditioning
Superheating in a refrigeration cycle

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

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

Halide torch
Soap and water
All of these
Sulphur sticks

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