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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In case of sensible cooling of air, the coil efficiency is given by

1/ B.P.F.
1 + B.P.F.
1 - B.P.F.
P.F. - 1

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Refrigeration and Air Conditioning
Most thermostatic expansion valves are set for a superheat of

10°C
20°C
15°C
5°C

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Refrigeration and Air Conditioning
In a refrigeration system, heat absorbed in comparison to heat rejected is

Less
More
Same
More for small capacity and less for high capacity

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Refrigeration and Air Conditioning
The thermostatic expansion valve operates on the changes in the

None of these
Degree of superheat at exit from the evaporator
Temperature of the evaporator
Pressure in the evaporator

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Refrigeration and Air Conditioning
One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice

In 1 minute
In 12 hours
In 1 hour
In 24 hours

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Refrigeration and Air Conditioning
The heat rejection factor (HRF) is given by

1 - (1/C.O.P)
1 - C.O.P.
1 + (1/C.O.P)
1 + C.O.P

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MORE MCQ ON Refrigeration and Air Conditioning

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