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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m²/h
m/hK
m/h
m²/hK

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Refrigeration and Air Conditioning
Critical pressure of a liquid is the pressure

Above which liquid will remain liquid
Above which liquid becomes gas
Above which liquid becomes solid
Above which liquid becomes vapour

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Refrigeration and Air Conditioning
In larger industrial and commercial reciprocating compression systems, refrigerant widely used is

R-12
Ammonia
Carbon dioxide
Sulphur dioxide

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Refrigeration and Air Conditioning
The Freon group of refrigerants are

Inorganic refrigerants
Halocarbon refrigerants
Zoetrope refrigerants
Hydrocarbon refrigerants

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

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

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Refrigeration and Air Conditioning
If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be

More/less depending on rating
Same
More
Less

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MORE MCQ ON Refrigeration and Air Conditioning

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