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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Ammonia is

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

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

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

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Refrigeration and Air Conditioning
Highest temperature encountered in refrigeration cycle should be

At critical Temperature
Near critical temperature of refrigerant
Much below critical temperature
Above critical temperature

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

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

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

Lower than
Higher than
None of these
Same as

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Refrigeration and Air Conditioning
The vertical and uniformly spaced lines on a psychrometric chart indicates

Dry bulb temperature
Specific humidity
Dew point temperature
Wet bulb temperature

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MORE MCQ ON Refrigeration and Air Conditioning

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