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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Chaperon equation is applicable for registration at

Triple point
Saturation point of vapour
Sublimation temperature
Saturation point of liquid

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Refrigeration and Air Conditioning
If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be

6
1.2
0.2
5

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

Expansion valve
Evaporator
Receiver
Compressor discharge

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Refrigeration and Air Conditioning
The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T₁ = Lowest absolute temperature, and T₂ = Highest absolute temperature)

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

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Refrigeration and Air Conditioning
One tonne of refrigeration (1TR) means that the heat removing capacity is

420 kJ/min
210 kJ/min
620 kJ/min
21 kJ/min

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Refrigeration and Air Conditioning
Which of the following refrigerant has the highest freezing point.

Ammonia
Sulphur dioxide
Carbon dioxide
R-12

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MORE MCQ ON Refrigeration and Air Conditioning

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