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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
During heating and dehumidification process, dry bulb temperature

None of these
Remains constant
Increases
Decreases

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Refrigeration and Air Conditioning
One ton refrigeration corresponds to

50 kcal/ hr
80 kcal/ min
50 kcal/ min
80 kcal/ hr

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Refrigeration and Air Conditioning
Ammonia is

Toxic and non-inflammable
Non-toxic
Non-inflammable
Highly toxic and inflammable

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Refrigeration and Air Conditioning
The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called

Relative humidity
Absolute humidity
Humidity ratio
Degree of saturation

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Refrigeration and Air Conditioning
The coefficient of performance of Heat Pump is always ___ one.

Less than
None of the listed here
Equal to
Greater than

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Refrigeration and Air Conditioning
When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be

Heated and dehumidified
Cooled and humidified
Cooled and dehumidified
Heated and humidified

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