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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is ________ dew point temperature.

Higher than
None of these
Lower than
Same as

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

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

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Refrigeration and Air Conditioning
When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by

Operating the machine at higher speeds
Operating the machine at lower speeds
Raising the higher temperature
Lowering the higher temperature

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Refrigeration and Air Conditioning
The evaporator used in household refrigerators is

Defrosting evaporator
Frosting evaporator
None of these
Non-frosting evaporator

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Refrigeration and Air Conditioning
An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation from surface 1 to surface 2 is given by

e₁e₂
(e₁ + e₂)/ e₁ + e₂ - e₁e₂
e₁ + e₂
1/e₁ + 1/e₂

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Refrigeration and Air Conditioning
Vapour compression refrigeration is somewhat like

Carnot cycle
Reversed Carnot cycle
None of these

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MORE MCQ ON Refrigeration and Air Conditioning

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