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Refrigeration and Air Conditioning

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

Carbon dioxide
Ammonia
Brine
Freon

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Refrigeration and Air Conditioning
The coefficient of performance of a domestic refrigerator is ________ as compared to a domestic air-conditioner.

Same
More
Less
None of these

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Refrigeration and Air Conditioning
The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure, is called

Absolute humidity
Degree of saturation
Relative humidity
Humidity ratio

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Refrigeration and Air Conditioning
In a refrigeration system, the expansion device is connected between the

Condenser and receiver
Evaporator and compressor
Receiver and evaporator
Compressor and condenser

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Refrigeration and Air Conditioning
In aqua ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water in

Evaporator
Condenser
None of these
Absorber

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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

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

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