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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
During dehumidification process, _________ remains constant.

Specific humidity
Dry bulb temperature
Relative humidity
Wet bulb temperature

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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)/ e₁ + e₂ - e₁e₂
1/e₁ + 1/e₂

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Refrigeration and Air Conditioning
In air-conditioning of aeroplanes, using air as a refrigerant, the cycle used is

Reversed Carnot cycle
Reversed Joule cycle
Reversed Otto cycle
Reversed Brayton cycle

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Refrigeration and Air Conditioning
The wet bulb temperature during sensible cooling of air

None of these
Decreases
Increases
Remains constant

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Refrigeration and Air Conditioning
The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called

Degree of saturation
Absolute humidity
Humidity ratio
Relative humidity

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Refrigeration and Air Conditioning
The specific humidity during heating and humidification process.

None of these
Remains constant
Increases
Decreases

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