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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
An important characteristic of absorption system of refrigeration is

cooling below 0°C
quiet operation
very little power consumption
noisy operation

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Refrigeration and Air Conditioning
The ratio of heat extracted in the refrigerator to the work-done on the refrigerant is called

Coefficient of performance of refrigeration
Coefficient of performance of heat pump
Refrigerating efficiency
Relative coefficient of performance

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Refrigeration and Air Conditioning
In a vapour compression system, the condition of refrigerant before passing through the condenser is

Wet vapour
Superheated vapour
Saturated liquid
Dry saturated vapour

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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
7.44 kW
1.86 kW
18.6 kW

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Refrigeration and Air Conditioning
The leaks in a refrigeration system using Freon are detected by

Smelling
Halide torch which on detection produces greenish flame lighting
Using reagents
Sulphur sticks which on detection gives white smoke

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Refrigeration and Air Conditioning
Air conditioning means

Dehumidifying
Heating
Cooling
All of these

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MORE MCQ ON Refrigeration and Air Conditioning

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