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Refrigeration and Air Conditioning

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

Dew point temperature
Wet bulb temperature
Relative humidity
Dry bulb temperature

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Refrigeration and Air Conditioning
An evaporator is also known as

All of these
Chilling coil
Cooling coil
Freezing coil

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Refrigeration and Air Conditioning
During sensible cooling,

Wet bulb temperature increases
Specific humidity increases
Relative humidity remains constant
Partial pressure of vapour remains constant

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Refrigeration and Air Conditioning
Aqua ammonia is used as refrigerant in the following type of refrigeration system

Compression
Direct
Absorption
Indirect

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Refrigeration and Air Conditioning
In larger industrial and commercial reciprocating compression systems, refrigerant widely used is

Carbon dioxide
Sulphur dioxide
R-12
Ammonia

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Refrigeration and Air Conditioning
Which of the following is not a desirable property of a refrigerant?

Large latent heat
Low boiling point
Good electrical conductor
High risibility with oil

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