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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Hydrogen is used in Electrolux refrigeration system so as to _________ the rate of evaporation of the liquid ammonia passing through the evaporator.

Reduce
Increase
None of these
Equalize

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Refrigeration and Air Conditioning
A refrigerant compressor is used to

Circulate the refrigerant through the refrigerating system
Raise the temperature of the refrigerant
Raise the pressure of the refrigerant
All 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)

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

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Refrigeration and Air Conditioning
Condensing temperature in a refrigerator is the temperature

Of cooling medium
Of evaporator
At which refrigerant gas becomes liquid
Of freezing zone

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Refrigeration and Air Conditioning
The boiling point of ________ is 10.5°C.

Carbon dioxide
Sulphur dioxide
Ammonia
R-12

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Refrigeration and Air Conditioning
Air refrigeration operates on

Reversed Carnot cycle
Carnot cycle
Rankine’s cycle
Brayton cycle

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MORE MCQ ON Refrigeration and Air Conditioning

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