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Refrigeration and Air Conditioning

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

Greater than
None of these
Less than
Equal to

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Refrigeration and Air Conditioning
The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity)

22°C DBT and 60% RH
20°C DBT and 80% RH
25°C DBT and 40% RH
25°C DBT and 100% RH

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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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Refrigeration and Air Conditioning
Most of the domestic refrigerators work on the following refrigeration system

Carnot cycle
Vapour compression
Vapour absorption
Electrolux refrigerator

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Refrigeration and Air Conditioning
A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called

Specific humidity
Saturated air
Dry air
Moist air

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Refrigeration and Air Conditioning
The higher temperature in vapour compression cycle occurs at

Receiver
Expansion valve
Compressor discharge
Evaporator

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MORE MCQ ON Refrigeration and Air Conditioning

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