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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is___ dry bulb temperature.

Lower than
None of the listed here
Same as
Higher than

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Refrigeration and Air Conditioning
In aqua ammonia and Lithium bromide water absorption refrigeration systems, the refrigerants are respectively

Water and lithium bromide
Water and water
Ammonia and lithium bromide
Ammonia and water

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Refrigeration and Air Conditioning
Mass flow ratio of NH₃ in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of

1: 9
1: 3
1: 1
9: 1

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Refrigeration and Air Conditioning
In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be

Any value
Zero
As low as possible (3 to 11°C)
High, of the order of 25°

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Refrigeration and Air Conditioning
The evaporator changes the low pressure liquid refrigerant from the expansion valve into

None of these
High pressure liquid refrigerant
Low pressure vapour refrigerant
Low pressure liquid and vapour refrigerant

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Refrigeration and Air Conditioning
The curved lines on a psychrometric chart indicates

Dry bulb temperature
Relative humidity
Wet bulb temperature
Dew point temperature

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MORE MCQ ON Refrigeration and Air Conditioning

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