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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The specific humidity during humidification process

Increases
Decreases
None of these
Remains constant

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

Ammonia
All of these
CO?
R-12

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Refrigeration and Air Conditioning
Which of the following statement is correct for ammonia as a refrigerant?

It reacts with copper and its alloys.
All of these
It requires large displacement per TR compared to fluoro carbons.
It is toxic to mucous membranes.

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Refrigeration and Air Conditioning
The power per tonne of refrigeration is

None of these
3.5 × C.O.P.
3.5/C.O.P.
O.P/3.5

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Refrigeration and Air Conditioning
The curved lines on a psychrometric chart indicates

Dew point temperature
Dry bulb temperature
Wet bulb temperature
Relative humidity

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Refrigeration and Air Conditioning
The capillary tube, as an expansion device, is used in

Domestic refrigerators
Room air conditioners
Water coolers
All of these

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