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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In a refrigeration cycle, the flow of refrigerant is controlled by

Condenser
Expansion valve
Evaporator
Compressor

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Refrigeration and Air Conditioning
A vapour absorption refrigerator uses _________ as a refrigerant.

Water
Freon
Aqua-ammonia
Ammonia

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Refrigeration and Air Conditioning
For unsaturated air, the dew point temperature is __________ wet bulb temperature.

Equal to
Less than
More than
None of these

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Refrigeration and Air Conditioning
If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be

0.2
1.2
5
6

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Refrigeration and Air Conditioning
A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is

Ammonia
Brine
Carbon dioxide
Freon

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Refrigeration and Air Conditioning
In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = Bypass factor)

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

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MORE MCQ ON Refrigeration and Air Conditioning

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