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Refrigeration and Air Conditioning

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

Sulphur sticks
All of these
Soap and water
Halide torch

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Refrigeration and Air Conditioning
Which of the following refrigerants has lowest freezing point?

NH3
CO2
Freon-22
Freon-12

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

Carbon dioxide
Ammonia
Sulphur dioxide
R-12

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Refrigeration and Air Conditioning
The C.O.P. of a heat pump working on a reversed Carnot cycle is

T₂/(T₂ - T₁)
(T₂ - T₁)/T₁
T₁/(T₂ - T₁)
(T₁ - T₂)/T₁

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Refrigeration and Air Conditioning
A condenser of refrigeration system rejects heat at the rate of 120 kW, while its compressor consumes a power of 30 kW. The coefficient of performance of the system will be

43834
3
43833
4

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Refrigeration and Air Conditioning
For obtaining high COP, the pressure range of compressor should be

Optimum
Low
Any value
High

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MORE MCQ ON Refrigeration and Air Conditioning

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