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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Air refrigerator works on

Reversed Carnot cycle
Bell Coleman cycle
Both (A) and (B)
None of these

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Refrigeration and Air Conditioning
The domestic refrigerator uses following type of compressor

Piston type reciprocating
Axial
Centrifugal
Miniature sealed unit

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Refrigeration and Air Conditioning
The humidity ratio or specific humidity is the mass of water vapour present in

1 kg of wet air
1 m3 of wet air
1 kg of dry air
1 m3 of dry air

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Refrigeration and Air Conditioning
Pressure of water vapour is given by

0.622 Pv/ (Pb - Pv)
[Pv (Pb - Pd)]/ [Pd (Pb - Pv)]
None of these
μ/[1 - (1 - μ) (Ps/Pb)]

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Refrigeration and Air Conditioning
In aqua ammonia and Lithium bromide water absorption refrigeration systems, the refrigerants are respectively

Water and water
Ammonia and water
Water and lithium bromide
Ammonia and lithium bromide

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Refrigeration and Air Conditioning
Formation of frost on evaporator in refrigerator

Is immaterial
Increases heat transfer rate
Can be avoided by proper design
Results in loss of heat due to poor heat transfer

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MORE MCQ ON Refrigeration and Air Conditioning

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