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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The C.O.P. of a heat pump working on a reversed Carnot cycle is

T₂/(T₂ - T₁)
(T₁ - T₂)/T₁
(T₂ - T₁)/T₁
T₁/(T₂ - T₁)

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Refrigeration and Air Conditioning
The heat rejection factor (HRF) is given by

1 - C.O.P.
1 + C.O.P
1 + (1/C.O.P)
1 - (1/C.O.P)

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Refrigeration and Air Conditioning
Condensing temperature in a refrigerator is the temperature

Of evaporator
Of cooling medium
Of freezing zone
At which refrigerant gas becomes liquid

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Refrigeration and Air Conditioning
In vapour compression cycle the condition of refrigerant is superheated vapour

Before entering the expansion valve
After passing through the expansion or throttle valve
After passing through the condenser
Before passing through the condenser

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Refrigeration and Air Conditioning
The higher temperature in vapour compression cycle occurs at

Compressor discharge
Expansion valve
Evaporator
Receiver

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Refrigeration and Air Conditioning
The freezing point of sulphur dioxide is

-75.2°C
-77.7°C
-56.6°C
-135.8°C

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MORE MCQ ON Refrigeration and Air Conditioning

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