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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The specific humidity during cooling and dehumidification

None of these
Increases
Remains constant
Decreases

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Refrigeration and Air Conditioning
The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and

Lithium bromide
Sulphur dioxide
Carbon dioxide
R-12

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Refrigeration and Air Conditioning
If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be

Same
More/less depending on rating
More
Less

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

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

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Refrigeration and Air Conditioning
A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be

2.33
1.33
4.33
3.33

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Refrigeration and Air Conditioning
In a vapour absorption refrigeration system, the compressor of the vapour compression system is replaced by

Liquid pump
Generator
Absorber and generator
Absorber, generator and liquid pump

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