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Refrigeration and Air Conditioning

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

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

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Refrigeration and Air Conditioning
The leakage in a refrigeration system using Freon is detected by

Soap and water
All of these
Halide torch
Sulphur sticks

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Refrigeration and Air Conditioning
Where does the lowest temperature occur in a vapour compression cycle?

Condenser
Evaporator
Compressor
Expansion valve

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Refrigeration and Air Conditioning
The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases,

Will be lower
May be higher or lower depending upon the nature of non-condensable gases
Will remain unaffected
Will be higher

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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

1.86 kW
18.6 kW
3.72 kW
7.44 kW

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Refrigeration and Air Conditioning
As relative humidity decreases, the dew point temperature will be ___ wet bulb temperature.

Same as
None of the listed here
Lower than
Higher than

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