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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The leakage in a refrigeration system using ammonia is detected by

Halide torch
All of these
Sulphur sticks
Soap and water

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Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is ________ dew point temperature.

Lower than
Same as
Higher than
None of these

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Refrigeration and Air Conditioning
A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be

Lack of cooling water
Dirty condenser surface
All of these
Water temperature being high

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Refrigeration and Air Conditioning
The relative humidity lines on a psychrometric chart are

Curved lines
Vertical and uniformly spaced
Horizontal and uniformly spaced
Horizontal and non-uniformly spaced

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Refrigeration and Air Conditioning
The total pressure exerted by the mixture of air and water vapour is equal to the sum of pressures which each constituent would exert, if it occupied the same space by itself. This statement is called

Kinetic theory of gases
Avogadro's hypothesis
Dalton's law of partial pressures
Newton's law of gases

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Refrigeration and Air Conditioning
The C.O.P. of a Carnot refrigerator in winter will be _________ as compared to C.O.P. in summer.

Same
Higher
None of these
Lower

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