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Refrigeration and Air Conditioning

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

Lower than
Higher than
Same as
None of these

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Refrigeration and Air Conditioning
During cooling and dehumidification, dry bulb temperature

Increases
Remains constant
Decreases
None of these

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

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

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Refrigeration and Air Conditioning
The thermostatic expansion valve is used in ________ type of evaporators.

Dry
Flooded
DX coil
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
Operating the machine at lower speeds
Operating the machine at higher speeds
Raising the higher temperature

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

Wet bulb temperature
Relative humidity
Dry bulb temperature
Specific humidity

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