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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
A vapour absorption refrigeration system

Requires little power consumption
Gives noisy operation
Gives quiet operation
Cools below 0°C

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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
Before passing through the condenser
After passing through the condenser

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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

7.44 kW
3.72 kW
18.6 kW
1.86 kW

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Refrigeration and Air Conditioning
The condition of refrigerant as it leaves the compressor in a vapour compression system is

Superheated vapour
Dry saturated vapour
Saturated liquid
Wet vapour

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Refrigeration and Air Conditioning
A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be

4.33
3.33
1.33
2.33

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Refrigeration and Air Conditioning
The coefficient of performance of Heat Pump is always ___ one.

Equal to
None of the listed here
Less than
Greater than

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MORE MCQ ON Refrigeration and Air Conditioning

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