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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant

decreases
increases
depends on other factors
remains same

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Refrigeration and Air Conditioning
During sensible cooling,

Partial pressure of vapour remains constant
Specific humidity increases
Relative humidity remains constant
Wet bulb temperature increases

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Refrigeration and Air Conditioning
Air conditioning means

All of these
Heating
Dehumidifying
Cooling

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

Remains constant
None of these
Increases
Decreases

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Refrigeration and Air Conditioning
A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be

All of these
Water temperature being high
Lack of cooling water
Dirty condenser surface

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

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

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MORE MCQ ON Refrigeration and Air Conditioning

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