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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Which of the following is not a desirable property of a refrigerant?

Large latent heat
Good electrical conductor
Low boiling point
High risibility with oil

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Refrigeration and Air Conditioning
Absorption system normally uses the following refrigerant

Freon-11
CO2
Ammonia
Freon-22

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

Brass
Steel
Aluminium
Copper

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Refrigeration and Air Conditioning
Vapour compression refrigeration is somewhat like

Reversed Carnot cycle
Carnot cycle
None of these

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Refrigeration and Air Conditioning
In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = Bypass factor)

P.F. - 1
1 + B.P.F.
1/ B.P.F.
1 - B. P.F.

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Refrigeration and Air Conditioning
During adiabatic saturation process on unsaturated air ___ remains constant.

Wet bulb temperature
Relative humidity
Dew point temperature
Dry bulb temperature

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