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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Where does the lowest temperature occur in a vapour compression cycle?

Compressor
Expansion valve
Condenser
Evaporator

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Refrigeration and Air Conditioning
The colour of the flame of halide torch, in case of leakage of Freon refrigerant, will change to

Yellow
Bright green
Red
Orange

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

Carbon dioxide
R-12
Ammonia
Sulphur dioxide

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Refrigeration and Air Conditioning
Which of the following is not a desirable property of a refrigerant?

Large latent heat
Good electrical conductor
Low boiling point
High risibility with oil

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Refrigeration and Air Conditioning
In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about

5.12
1
2.15
1.25

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Refrigeration and Air Conditioning
Superheating in a refrigeration cycle

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

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MORE MCQ ON Refrigeration and Air Conditioning

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