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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In a vapour compression cycle, the refrigerant immediately after expansion valve is

Sub-cooled liquid
Wet vapour
Liquid
Saturated liquid

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Refrigeration and Air Conditioning
The specific humidity during heating and humidification process.

Remains constant
None of these
Increases
Decreases

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

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

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Refrigeration and Air Conditioning
In a pressure enthalpy chart, the space to the left of the saturated liquid line represents

Superheated vapour region
Sub-cooled liquid region
None of the listed here
Wet vapour region

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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

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

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Refrigeration and Air Conditioning
In a refrigerating machine, heat rejected is _________ heat absorbed.

Less than
None of these
Equal to
Greater than

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