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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m²/hK
m²/h
m/h
m/hK

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Refrigeration and Air Conditioning
The reduced ambient air cooling system has

Two cooling turbines and one heat exchanger
Two cooling turbines and two heat exchangers
One cooling turbine and one heat exchanger
One cooling turbine and two heat exchangers

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Refrigeration and Air Conditioning
When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by

Lowering the higher temperature
Raising the higher temperature
Operating the machine at higher speeds
Operating the machine at lower speeds

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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
Aqua ammonia is used as refrigerant in the following type of refrigeration system

Direct
Indirect
Compression
Absorption

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Refrigeration and Air Conditioning
The process, generally used in winter air-conditioning to warm and humidity the air, is called

Humidification
Heating and humidification
Dehumidification
Cooling and dehumidification

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MORE MCQ ON Refrigeration and Air Conditioning

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