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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The relative coefficient of performance is

Actual COP × theoretical COP
Actual COP/theoretical COP
Theoretical COP/actual COP
None of these

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Refrigeration and Air Conditioning
When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by

Lowering the higher temperature
Raising the higher temperature
Operating the machine at lower speeds
Operating the machine at higher speeds

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

Specific humidity
Wet bulb temperature
Relative humidity
Dry bulb temperature

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Refrigeration and Air Conditioning
The superheated vapour region, in a pressure enthalpy chart, is represented by the space

To the right of saturated liquid line
Between the saturated liquid line and saturated vapour line
None of these
To the left of saturated liquid line

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Refrigeration and Air Conditioning
Chaperon equation is applicable for registration at

Saturation point of liquid
Saturation point of vapour
Sublimation temperature
Triple point

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Refrigeration and Air Conditioning
The relative humidity lines on a psychrometric chart are

Vertical and uniformly spaced
Horizontal and non-uniformly spaced
Curved lines
Horizontal and uniformly spaced

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