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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Where does the lowest temperature occur in a vapour compression cycle?

Condenser
Compressor
Evaporator
Expansion valve

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Refrigeration and Air Conditioning
During cooling and dehumidification, dry bulb temperature

Remains constant
None of these
Decreases
Increases

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Refrigeration and Air Conditioning
The specific humidity during dehumidification process

Decreases
Remains constant
Increases
None of these

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Refrigeration and Air Conditioning
The relative coefficient of performance is equal to

(Actual C.O.P.) × (Theoretical C.O.P.)
(Actual C.O.P.) /(Theoretical C.O.P.)
None of these
(Theoretical C.O.P.)/ (Actual C.O.P.)

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Refrigeration and Air Conditioning
Vapour compression refrigeration is somewhat like

Reversed Carnot cycle
Carnot cycle
None of these

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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

18.6 kW
3.72 kW
7.44 kW
1.86 kW

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