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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In a refrigeration cycle, the flow of refrigerant is controlled by

Expansion valve
Compressor
Evaporator
Condenser

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Refrigeration and Air Conditioning
A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be

4 kW
3 kW
1 kW
2 kW

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

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Refrigeration and Air Conditioning
The sub-cooling in a refrigeration cycle

Increases C.O.P.
Does not alter C.O.P.
Decreases C.O.P.
None of these

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Refrigeration and Air Conditioning
The heat rejection factor (HRF) is given by

1 - C.O.P.
1 + (1/C.O.P)
1 - (1/C.O.P)
1 + C.O.P

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Refrigeration and Air Conditioning
Ammonia is

Highly toxic and inflammable
Toxic and non-inflammable
Non-inflammable
Non-toxic

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MORE MCQ ON Refrigeration and Air Conditioning

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