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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
During sensible cooling of air, specific humidity

Decreases
Increases
Remains constant
None of the listed here

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Refrigeration and Air Conditioning
The boiling point of ________ is 10.5°C.

Ammonia
R-12
Carbon dioxide
Sulphur dioxide

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Refrigeration and Air Conditioning
During dehumidification process, _________ remains constant.

Relative humidity
Dry bulb temperature
Specific humidity
Wet bulb temperature

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Refrigeration and Air Conditioning
For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference (tm) for parallel flow is ________ that for counter flow.

None of these
Equal to
Greater than
Less than

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Refrigeration and Air Conditioning
The horizontal and non-uniformly spaced lines on a psychrometric chart indicates

Dew point temperature
Dry bulb temperature
Specific humidity
Wet bulb temperature

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Refrigeration and Air Conditioning
For obtaining high COP, the pressure range of compressor should be

Low
Any value
High
Optimum

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