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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In case of sensible cooling of air, the coil efficiency is given by

1 - B.P.F.
P.F. - 1
1/ B.P.F.
1 + B.P.F.

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Refrigeration and Air Conditioning
The cooling system used for supersonic aircrafts and rockets is

Regenerative air cooling system
Simple air cooling system
Reduced ambient air cooling system
Bootstrap air cooling system

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Refrigeration and Air Conditioning
The thermostatic expansion valve operates on the changes in the

Pressure in the evaporator
Temperature of the evaporator
Degree of superheat at exit from the evaporator
None of these

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Refrigeration and Air Conditioning
Pick up the wrong statement. A refrigerant should have

High boiling point
Tow specific heat of liquid
High latent heat of vaporisation
Higher critical temperature

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Refrigeration and Air Conditioning
One ton refrigeration corresponds to

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

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Refrigeration and Air Conditioning
During sensible heating of air _________ decreases.

Specific humidity
Relative humidity
Wet bulb temperature
Dry bulb temperature

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