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Refrigeration and Air Conditioning

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

None of the listed here
Zero
Negative
Positive

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Refrigeration and Air Conditioning
Under cooling in a refrigeration cycle

Other factors decide C.O.P
Decreases C.O.P
O.P remains unaltered
Increases C.O.P

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Refrigeration and Air Conditioning
The heat rejection factor (HRF) is given by

1 - (1/C.O.P)
1 + C.O.P
1 - C.O.P.
1 + (1/C.O.P)

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Refrigeration and Air Conditioning
On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process

Takes place at constant entropy
Takes place at constant pressure
Takes place at constant temperature
Involves no change in volume

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Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is ________ dew point temperature.

Lower than
None of these
Same as
Higher than

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

decreases
increases
remains same
depends on other factors

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MORE MCQ ON Refrigeration and Air Conditioning

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