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Refrigeration and Air Conditioning

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

Less than
None of these
Equal to
More than

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Refrigeration and Air Conditioning
Ammonia absorption refrigeration cycle requires

Maximum work input
Nearly same work input as for vapour compression cycle
Zero work input
Very little work input

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Refrigeration and Air Conditioning
The desirable property of a refrigerant is

Low boiling point
High latent heat of vaporisation
All of these
High critical temperature

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Refrigeration and Air Conditioning
The evaporator changes the low pressure liquid refrigerant from the expansion valve into

None of these
Low pressure vapour refrigerant
Low pressure liquid and vapour refrigerant
High pressure liquid refrigerant

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

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Refrigeration and Air Conditioning
In order to collect liquid refrigerant and to prevent it from going to a ________, a device known as accumulator is used at the suction of compressor.

Compressor
Expansion valve
Evaporator
Condenser

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