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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
For unsaturated air, the dew point temperature is __________ wet bulb temperature.

More than
Equal to
Less than
None of these

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Refrigeration and Air Conditioning
The refrigerant after condensation process is cooled below the saturation temperature before throttling. Such a process is called

Super-cooling
None of the listed here
Normal cooling
Sub-cooling or under-cooling

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Refrigeration and Air Conditioning
In order to collect liquid refrigerant and to prevent it from going to a ________, a device known as accumulator is used at the suction of compressor.

Evaporator
Condenser
Compressor
Expansion valve

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Refrigeration and Air Conditioning
During humidification process, __________ increases.

Specific humidity
Relative humidity
Wet bulb temperature
Dry bulb temperature

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Refrigeration and Air Conditioning
One ton refrigeration corresponds to

50 kcal/ min
80 kcal/ min
80 kcal/ hr
50 kcal/ hr

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

decreases
depends on other factors
remains same
increases

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