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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Condensing temperature in a refrigerator is the temperature

Of cooling medium
At which refrigerant gas becomes liquid
Of freezing zone
Of evaporator

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Refrigeration and Air Conditioning
In vapour compression cycle using NH₃ as refrigerant, initial charge is filled at

Suction of compressor
Low pressure side near receiver
High pressure side close to receiver
Delivery of compressor

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

None of these
Lower
Higher
Same

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Refrigeration and Air Conditioning
Vertical lines on pressure-enthalpy chart show constant

Total heat lines
Temperature lines
Pressure lines
Entropy lines

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Refrigeration and Air Conditioning
The humidification process, on the psychrometric chart is shown by

Vertical line
Inclined line
Curved line
Horizontal line

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Refrigeration and Air Conditioning
When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by

Operating the machine at higher speeds
Operating the machine at lower speeds
Raising the higher temperature
Lowering the higher temperature

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MORE MCQ ON Refrigeration and Air Conditioning

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