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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In order to collect liquid refrigerant and to prevent it from going to a ________, a device known as accumulator is used at the suction of compressor.

Expansion valve
Evaporator
Compressor
Condenser

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Refrigeration and Air Conditioning
In vapour compression refrigeration system, refrigerant occurs as liquid between

Condenser and expansion valve
Compressor and evaporator
Compressor and condenser
Expansion valve and evaporator

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Refrigeration and Air Conditioning
A condenser of refrigeration system rejects heat at the rate of 120 kW, while its compressor consumes a power of 30 kW. The coefficient of performance of the system will be

4
3
43834
43833

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Refrigeration and Air Conditioning
The process, generally used in summer air conditioning to cool and dehumidify the air, is called

Humidification
Heating and humidification
Dehumidification
Cooling and dehumidification

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Refrigeration and Air Conditioning
The capillary tube, as an expansion device, is used in

Domestic refrigerators
Room air conditioners
All of these
Water coolers

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Refrigeration and Air Conditioning
Nusselt number (NN) is given by

NN = ρ V l /μ
NN = hl/k
NN = μ cp/k
NN = V²/t.cp

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