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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Hydrogen is used in Electrolux refrigeration system so as to _________ the rate of evaporation of the liquid ammonia passing through the evaporator.

Increase
Reduce
None of these
Equalize

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Refrigeration and Air Conditioning
The evaporator used in household refrigerators is

Defrosting evaporator
Non-frosting evaporator
Frosting evaporator
None of these

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Refrigeration and Air Conditioning
Where does the lowest temperature occur in a vapour compression cycle?

Expansion valve
Condenser
Evaporator
Compressor

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Refrigeration and Air Conditioning
The freezing point of R-12 is

-95.2°C
-107.7°C
-135.8°C
-86.6°C

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

Absorption
Compression
Direct
Indirect

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

Dry bulb temperature
Wet bulb temperature
Specific humidity
Dew point temperature

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