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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
During adiabatic saturation process on unsaturated air ___ remains constant.

Wet bulb temperature
Dry bulb temperature
Relative humidity
Dew point temperature

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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

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

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

Less than
Equal to
More than
None of these

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Refrigeration and Air Conditioning
The lowest thermal diffusivity is of

Lead
Rubber
Aluminium
Iron

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Refrigeration and Air Conditioning
A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be

2 kW
3 kW
1 kW
4 kW

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Refrigeration and Air Conditioning
The reduced ambient air cooling system has

One cooling turbine and one heat exchanger
Two cooling turbines and one heat exchanger
One cooling turbine and two heat exchangers
Two cooling turbines and two heat exchangers

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