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Refrigeration and Air Conditioning

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

None of these
Lower than
Higher than
Same as

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Refrigeration and Air Conditioning
While designing the refrigeration system of an aircraft, the prime consideration is that the

Mass of the refrigeration equipment is low
Mass of refrigerant circulated in the system is low
System has high C.O.P.
Power per TR is low

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Refrigeration and Air Conditioning
The coefficient of performance is the ratio of the refrigerant effect to the

Work done by compressor
Heat of compression
Enthalpy increase in compressor
All of these

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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

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

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Refrigeration and Air Conditioning
For better C.O.P of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be

Small
High
Equal
Anything

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Refrigeration and Air Conditioning
Accumulators should have adequate volume to store refrigerant charge at least

0.1
0.75
0.5
0.25

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MORE MCQ ON Refrigeration and Air Conditioning

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