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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Air refrigeration cycle is used in

Gas liquefaction
Commercial refrigerators
Air conditioning
Domestic refrigerators

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Refrigeration and Air Conditioning
R-12 is generally preferred over R-22 in deep freezers since

All of these
It has low operating pressures
It gives higher coefficient of performance
It is miscible with oil over large range of temperatures

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Refrigeration and Air Conditioning
The thermostatic expansion valve operates on the changes in the

Pressure in the evaporator
Temperature of the evaporator
Degree of superheat at exit from the evaporator
None of these

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Refrigeration and Air Conditioning
Pressure of water vapour is given by

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

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Refrigeration and Air Conditioning
A refrigerant compressor is used to

Raise the pressure of the refrigerant
Raise the temperature of the refrigerant
Circulate the refrigerant through the refrigerating system
All of these

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Refrigeration and Air Conditioning
The condition of refrigerant after passing through the condenser in a vapour compression system is

Superheated vapour
Wet vapour
Dry saturated vapour
Saturated liquid

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MORE MCQ ON Refrigeration and Air Conditioning

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