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Refrigeration and Air Conditioning

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

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

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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

3.72 kW
1.86 kW
18.6 kW
7.44 kW

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Refrigeration and Air Conditioning
One of the purposes of sub cooling the liquid refrigerant is to

Ensure that only liquid and not the vapour enters the expansion (throttling) valve
Reduce compressor overheating
Reduce compressor discharge temperature
Increase cooling effect

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

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

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

Decreases
Remains constant
Increases
None of these

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Refrigeration and Air Conditioning
The humidification process, on the psychrometric chart is shown by

Inclined line
Horizontal line
Curved line
Vertical line

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MORE MCQ ON Refrigeration and Air Conditioning

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