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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The thermostatic expansion valve is used in ________ type of evaporators.

DX coil
Flooded
Dry
None of these

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Refrigeration and Air Conditioning
The specific humidity during dehumidification process

None of these
Increases
Decreases
Remains constant

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Refrigeration and Air Conditioning
The operating temperature of a cold storage is -2°C. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40°C. The actual C.O.P. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. The power required to drive the plant is

7.44 kW
18.6 kW
1.86 kW
3.72 kW

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Refrigeration and Air Conditioning
The mass of water vapour present in __________ is called absolute humidity.

1 m3 of dry air
1 kg of wet air
1 m3 of water
1 kg of dry air

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Refrigeration and Air Conditioning
Air refrigeration cycle is used in

Gas liquefaction
Domestic refrigerators
Commercial refrigerators
Air conditioning

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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.

Condenser
Evaporator
Compressor
Expansion valve

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