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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Refrigeration in aeroplanes usually employs the following refrigerant

Freon-11
CO2
Freon-22
Air

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Refrigeration and Air Conditioning
The advantage of dry compression is that

It results in high volumetric and mechanical efficiency
All of these
It permits complete evaporation in the evaporator
It permits higher speeds to be used

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

Entropy lines
Total heat lines
Pressure lines
Temperature lines

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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
Same
Higher
Lower

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Refrigeration and Air Conditioning
In a domestic refrigerator, a capillary tube controls the flow of refrigerant from the

Condenser to the expansion valve
Evaporator to the thermostat
Expansion valve to the evaporator
Condenser to the evaporator

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Refrigeration and Air Conditioning
Absorption system normally uses the following refrigerant

Freon-22
Ammonia
Freon-11
CO2

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MORE MCQ ON Refrigeration and Air Conditioning

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