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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The C.O.P. of a Carnot refrigerator in winter will be _________ as compared to C.O.P. in summer.

Higher
Lower
None of these
Same

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Refrigeration and Air Conditioning
The advantage of dry compression is that

All of these
It permits complete evaporation in the evaporator
It results in high volumetric and mechanical efficiency
It permits higher speeds to be used

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Refrigeration and Air Conditioning
In a vapour compression system, the condition of refrigerant before entering the expansion or throttle valve is

High pressure saturated liquid
Dry vapour
Wet vapour
Very wet vapour

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Refrigeration and Air Conditioning
Accumulators should have adequate volume to store refrigerant charge at least

0.75
0.25
0.5
0.1

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

All of these
Sulphur sticks
Halide torch
Soap and water

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Refrigeration and Air Conditioning
Critical pressure of a liquid is the pressure

Above which liquid will remain liquid
Above which liquid becomes vapour
Above which liquid becomes solid
Above which liquid becomes gas

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MORE MCQ ON Refrigeration and Air Conditioning

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