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Refrigeration and Air Conditioning

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

-135.8°C
-95.2°C
-107.7°C
-86.6°C

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Refrigeration and Air Conditioning
In vapour compression cycle the condition of refrigerant is superheated vapour

After passing through the condenser
Before passing through the condenser
Before entering the expansion valve
After passing through the expansion or throttle valve

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Refrigeration and Air Conditioning
An Electrolux refrigerator is called a ___ absorption system.

None of the listed here
Single fluid
Three fluids
Two fluids

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Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m²/h
m/hK
m²/hK
m/h

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Refrigeration and Air Conditioning
A standard ice point temperature corresponds to the temperature of

Water at 0°C
Ice at 4°C
Solid and dry ice
Mixture of ice and water under equilibrium conditions

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Refrigeration and Air Conditioning
The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy diagram represents

Compression of the refrigerant vapour
Evaporation of the refrigerant liquid
Condensation of the refrigerant vapour
Metering of the refrigerant liquid

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