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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In a vapour compression cycle, the refrigerant immediately after expansion valve is

Saturated liquid
Wet vapour
Liquid
Sub-cooled liquid

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Refrigeration and Air Conditioning
The freezing point of sulphur dioxide is

-56.6°C
-77.7°C
-75.2°C
-135.8°C

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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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Refrigeration and Air Conditioning
For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference (tm) for parallel flow is ________ that for counter flow.

Equal to
Greater than
None of these
Less than

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Refrigeration and Air Conditioning
One tonne of refrigeration (1TR) means that the heat removing capacity is

21 kJ/min
420 kJ/min
210 kJ/min
620 kJ/min

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Refrigeration and Air Conditioning
The leakage in a refrigeration system using ammonia is detected by

Sulphur sticks
Soap and water
Halide torch
All of these

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MORE MCQ ON Refrigeration and Air Conditioning

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