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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.

Compressor
Expansion valve
Evaporator
Condenser

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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)

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

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Refrigeration and Air Conditioning
The temperature of air recorded by a thermometer, when it is not affected by the moisture present in the air, is called

Wet bulb temperature
Dry bulb temperature
None of these
Dew point temperature

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Refrigeration and Air Conditioning
Which of the following refrigerant has the maximum ozone depletion potential in the stratosphere?

Sulphur dioxide
Ammonia
Fluorine
Carbon dioxide

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Refrigeration and Air Conditioning
In a domestic refrigerator, a capillary tube controls the flow of refrigerant from the

Expansion valve to the evaporator
Condenser to the expansion valve
Evaporator to the thermostat
Condenser to the evaporator

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Refrigeration and Air Conditioning
During sensible cooling,

Partial pressure of vapour remains constant
Specific humidity increases
Relative humidity remains constant
Wet bulb temperature increases

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