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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In a domestic vapour compression refrigerator, the refrigerant commonly used is

Ammonia
CO?
All of these
R-12

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Refrigeration and Air Conditioning
For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of

Copper
Aluminium
Brass
Steel

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

Increases
Remains constant
None of these
Decreases

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Refrigeration and Air Conditioning
The dry bulb temperature lines, on the psychrometric chart are

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

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Refrigeration and Air Conditioning
During dehumidification process, _________ remains constant.

Specific humidity
Dry bulb temperature
Relative humidity
Wet bulb temperature

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Refrigeration and Air Conditioning
A vapour absorption refrigerator uses _________ as a refrigerant.

Aqua-ammonia
Freon
Ammonia
Water

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