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Refrigeration and Air Conditioning

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

All of these
Sulphur sticks
Soap and water
Halide torch

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Refrigeration and Air Conditioning
During a refrigeration cycle, heat is rejected by the refrigerant in a

Compressor
Expansion valve
Condenser
Evaporator

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Refrigeration and Air Conditioning
In a refrigerating machine, heat rejected is _________ heat absorbed.

Equal to
Less than
None of these
Greater than

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Refrigeration and Air Conditioning
The value of C.O.P in vapour compression cycle is usually

Always more than unity
Always less than unity
Any one of the above
Equal to unity

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Refrigeration and Air Conditioning
Highest temperature encountered in refrigeration cycle should be

Above critical temperature
At critical Temperature
Much below critical temperature
Near critical temperature of refrigerant

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Refrigeration and Air Conditioning
Vapour compression refrigeration is somewhat like

None of these
Reversed Carnot cycle
Carnot cycle

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