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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Most air cooled condensers are designed to operate with a temperature difference of

22°C
8°C
5°C
14°C

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Refrigeration and Air Conditioning
The wet bulb temperature during sensible heating of air

None of these
Increases
Decreases
Remains constant

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Refrigeration and Air Conditioning
The evaporator used in household refrigerators is

None of these
Defrosting evaporator
Non-frosting evaporator
Frosting evaporator

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Refrigeration and Air Conditioning
During heating and dehumidification process, dry bulb temperature

Remains constant
None of these
Decreases
Increases

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Refrigeration and Air Conditioning
Absorption system normally uses the following refrigerant

Freon-22
Ammonia
CO2
Freon-11

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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

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

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