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Refrigeration and Air Conditioning

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

1.25
2.15
5.12
1

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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

Orange
Red
Bright green
Yellow

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Refrigeration and Air Conditioning
Most of the domestic refrigerators work on the following refrigeration system

Carnot cycle
Electrolux refrigerator
Vapour compression
Vapour absorption

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

Low
Optimum
High
Any value

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Refrigeration and Air Conditioning
Pressure of water vapour is given by

None of these
μ/[1 - (1 - μ) (Ps/Pb)]
[Pv (Pb - Pd)]/ [Pd (Pb - Pv)]
0.622 Pv/ (Pb - Pv)

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Refrigeration and Air Conditioning
A standard ice point temperature corresponds to the temperature of

Water at 0°C
Solid and dry ice
Ice at 4°C
Mixture of ice and water under equilibrium conditions

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MORE MCQ ON Refrigeration and Air Conditioning

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