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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The wet bulb temperature during sensible heating of air

Remains constant
Decreases
None of these
Increases

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Refrigeration and Air Conditioning
In S.J. unit, one ton of refrigeration is equal to

21 kJ/ min
840 kJ/ min
420 kJ/ min
210 kJ/ min

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

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

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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

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

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Refrigeration and Air Conditioning
For better C.O.P of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be

Anything
High
Small
Equal

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Refrigeration and Air Conditioning
For obtaining high COP, the pressure range of compressor should be

Low
Optimum
High
Any value

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MORE MCQ ON Refrigeration and Air Conditioning

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