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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Short horizontal lines on pressure-enthalpy chart show

Constant pressure lines
Constant entropy lines
Constant temperature lines
Constant total heat lines

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Refrigeration and Air Conditioning
If a gas is to be liquefied, its temperature must be

Equal to critical temperature
Increased to a value above its critical temperature
Reduced to a value below its critical temperature
None of these

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Refrigeration and Air Conditioning
In mechanical refrigeration system, the refrigerant has the maximum temperature

Between compressor and condenser
In evaporator
Between condenser and evaporator
Before expansion valve

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

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

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Refrigeration and Air Conditioning
Air refrigeration operates on

Rankine’s cycle
Carnot cycle
Reversed Carnot cycle
Brayton cycle

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Refrigeration and Air Conditioning
The lowest temperature during the cycle in a vapour compression system occurs after

Evaporation
Condensation
Expansion
Compression

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MORE MCQ ON Refrigeration and Air Conditioning

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