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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
During a refrigeration cycle, heat is rejected by the refrigerant in a

Compressor
Expansion valve
Condenser
Evaporator

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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 COP of a domestic refrigerator

Depends upon the make
Is equal to 1
Is more than 1
Is less than 1

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Refrigeration and Air Conditioning
The leaks in a refrigeration system using Freon are detected by

Halide torch which on detection produces greenish flame lighting
Using reagents
Sulphur sticks which on detection gives white smoke
Smelling

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Refrigeration and Air Conditioning
In a vapour compression system, the condition of refrigerant before passing through the condenser is

Wet vapour
Dry saturated vapour
Superheated vapour
Saturated liquid

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Refrigeration and Air Conditioning
At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant

remains same
depends on other factors
increases
decreases

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MORE MCQ ON Refrigeration and Air Conditioning

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