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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The human body feels comfortable when the heat stored in the body is

Positive
Zero
None of these
Negative

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Refrigeration and Air Conditioning
A standard ice point temperature corresponds to the temperature of

Water at 0°C
Mixture of ice and water under equilibrium conditions
Solid and dry ice
Ice at 4°C

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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 atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The bypass factor of the heating coil is

0.4
0.6
0.67
0.376

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Refrigeration and Air Conditioning
When the temperature of the surrounding is higher than the temperature of the body, then the heat loss by convection from the body to the surrounding will be

Negative
None of the listed here
Positive
Zero

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Refrigeration and Air Conditioning
Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of C.O.P. of reversed Carnot Cycle?

1.25
0.8
0.5
0.25

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