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Refrigeration and Air Conditioning

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

Evaporator
Expansion valve
Compressor
Condenser

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Refrigeration and Air Conditioning
If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be

5
0.2
6
1.2

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Refrigeration and Air Conditioning
In aqua ammonia and Lithium bromide water absorption refrigeration systems, the refrigerants are respectively

Water and water
Ammonia and lithium bromide
Water and lithium bromide
Ammonia and water

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Refrigeration and Air Conditioning
The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases,

Will be higher
Will remain unaffected
May be higher or lower depending upon the nature of non-condensable gases
Will be lower

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Refrigeration and Air Conditioning
Which of the following refrigerant has the highest freezing point.

R-12
Ammonia
Carbon dioxide
Sulphur dioxide

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Refrigeration and Air Conditioning
The capacity of a domestic refrigerator is in the range of

3 to 5 TR
1 to 3 TR
5 to 7 TR
0.1 to 0.3 TR

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MORE MCQ ON Refrigeration and Air Conditioning

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