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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
An Electrolux refrigerator is called a ___ absorption system.

Two fluids
Three fluids
None of the listed here
Single fluid

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Refrigeration and Air Conditioning
Which of the following refrigerant has the maximum ozone depletion potential in the stratosphere?

Carbon dioxide
Fluorine
Ammonia
Sulphur dioxide

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Refrigeration and Air Conditioning
Highest temperature encountered in refrigeration cycle should be

Above critical temperature
At critical Temperature
Near critical temperature of refrigerant
Much below critical temperature

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Refrigeration and Air Conditioning
The advantage of dry compression is that

It permits higher speeds to be used
All of these
It results in high volumetric and mechanical efficiency
It permits complete evaporation in the 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

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

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Refrigeration and Air Conditioning
The mass of water vapour present in __________ is called absolute humidity.

1 kg of wet air
1 m3 of water
1 m3 of dry air
1 kg of dry air

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