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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m/h
m²/h
m²/hK
m/hK

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Refrigeration and Air Conditioning
In chemical dehumidification process,

All of these
Wet bulb temperature decreases
Dry bulb temperature increases
Dew point temperature decreases

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Refrigeration and Air Conditioning
In a refrigeration system, the expansion device is connected between the

Condenser and receiver
Receiver and evaporator
Evaporator and compressor
Compressor and condenser

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Refrigeration and Air Conditioning
Bell Coleman cycle is a

Reversed Joule cycle
Reversed Carnot cycle
Reversed Otto cycle
Reversed Rankine cycle

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Refrigeration and Air Conditioning
The formation of frost on cooling coils in a refrigerator

Reduces power consumption
Increases heat transfer
Increases power consumption
Improves C.O.P. of the system

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Refrigeration and Air Conditioning
If a gas is to be liquefied, its temperature must be

Equal to critical temperature
None of these
Reduced to a value below its critical temperature
Increased to a value above its critical temperature

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