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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Cooling water is required for following equipment in ammonia absorption plant

Condenser
Evaporator
Condenser, absorber and separator (rectifier)
Absorber

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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.

Same
Lower
Higher
None of these

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Refrigeration and Air Conditioning
A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with Cp = 1 kJ/kg)

100 kJ/kg
25 kJ/kg
125 kJ/kg
50 kJ/kg

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Refrigeration and Air Conditioning
The lowest thermal diffusivity is of

Lead
Aluminium
Iron
Rubber

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Refrigeration and Air Conditioning
During heating and dehumidification process, dry bulb temperature

None of these
Increases
Decreases
Remains constant

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Refrigeration and Air Conditioning
The freezing point of R-12 is

-135.8°C
-95.2°C
-86.6°C
-107.7°C

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MORE MCQ ON Refrigeration and Air Conditioning

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