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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
For large tonnage (more than 200 TR) air-conditioning applications, the compressor recommended is

Screw
Centrifugal
Reciprocating
Rotating

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Refrigeration and Air Conditioning
Critical pressure of a liquid is the pressure

Above which liquid becomes gas
Above which liquid becomes vapour
Above which liquid will remain liquid
Above which liquid becomes solid

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Refrigeration and Air Conditioning
Mass flow ratio of NH₃ in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of

1: 9
1: 1
9: 1
1: 3

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Refrigeration and Air Conditioning
Pressure of water vapour is given by

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

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Refrigeration and Air Conditioning
The relative coefficient of performance is

Theoretical COP/actual COP
Actual COP × theoretical COP
None of these
Actual COP/theoretical COP

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Refrigeration and Air Conditioning
In a domestic refrigerator, a capillary tube controls the flow of refrigerant from the

Expansion valve to the evaporator
Evaporator to the thermostat
Condenser to the expansion valve
Condenser to the evaporator

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MORE MCQ ON Refrigeration and Air Conditioning

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