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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In order to collect liquid refrigerant and to prevent it from going to a ________, a device known as accumulator is used at the suction of compressor.

Expansion valve
Condenser
Compressor
Evaporator

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Refrigeration and Air Conditioning
While designing the refrigeration system of an aircraft, the prime consideration is that the

System has high C.O.P.
Mass of the refrigeration equipment is low
Mass of refrigerant circulated in the system is low
Power per TR is low

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Refrigeration and Air Conditioning
The relative coefficient of performance is equal to

None of these
(Actual C.O.P.) /(Theoretical C.O.P.)
(Theoretical C.O.P.)/ (Actual C.O.P.)
(Actual C.O.P.) × (Theoretical C.O.P.)

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Refrigeration and Air Conditioning
A human body feels comfortable when the heat produced by the metabolism of human body is equal to the

Difference of (A) and (B)
Sum of (A) and (B)
Heat stored in the human body
Heat dissipated to the surroundings

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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

1.33
2.33
3.33
4.33

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

Greater than
Equal to
None of these
Less than

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