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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant

remains same
decreases
increases
depends on other factors

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Refrigeration and Air Conditioning
In Electrolux refrigerator

Ammonia is absorbed in hydrogen
Ammonia evaporates in hydrogen
Ammonia is absorbed in water
Hydrogen evaporates in ammonia

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Refrigeration and Air Conditioning
Pressure of water vapour is given by

0.622 Pv/ (Pb - Pv)
[Pv (Pb - Pd)]/ [Pd (Pb - Pv)]
None of these
μ/[1 - (1 - μ) (Ps/Pb)]

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Refrigeration and Air Conditioning
The freezing point of R-12 is

-95.2°C
-86.6°C
-135.8°C
-107.7°C

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Refrigeration and Air Conditioning
Which of the following cycles uses air as the refrigerant?

Ericson
Carnot
Stirling
Bell Coleman

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Refrigeration and Air Conditioning
The thermostatic expansion valve is used in ________ type of evaporators.

None of these
Dry
Flooded
DX coil

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MORE MCQ ON Refrigeration and Air Conditioning

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