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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Hydrogen is used in Electrolux refrigeration system so as to _________ the rate of evaporation of the liquid ammonia passing through the evaporator.

None of these
Reduce
Equalize
Increase

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

Absolute
Specific
Relative
None of these

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

All of these
Soap and water
Halide torch
Sulphur sticks

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Refrigeration and Air Conditioning
In a vapour compression cycle, the refrigerant immediately after expansion valve is

Wet vapour
Liquid
Saturated liquid
Sub-cooled liquid

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Refrigeration and Air Conditioning
The boiling point of ________ is 10.5°C.

Ammonia
Carbon dioxide
R-12
Sulphur dioxide

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Refrigeration and Air Conditioning
In a domestic vapour compression refrigerator, the refrigerant commonly used is

R-12
CO?
All of these
Ammonia

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