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Refrigeration and Air Conditioning

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

0.2
1.2
5
6

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Refrigeration and Air Conditioning
Pressure of water vapour is given by

μ/[1 - (1 - μ) (Ps/Pb)]
0.622 Pv/ (Pb - Pv)
[Pv (Pb - Pd)]/ [Pd (Pb - Pv)]
None of these

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Refrigeration and Air Conditioning
Ammonia is

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

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Refrigeration and Air Conditioning
Superheating in a refrigeration cycle

Increases C.O.P
Decreases C.O.P
O.P remains unaltered
Other factors decide C.O.P

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Refrigeration and Air Conditioning
In vapour compression cycle, the condition of refrigerant is very wet vapour

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

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

Condenser
Evaporator
Expansion valve
Compressor

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MORE MCQ ON Refrigeration and Air Conditioning

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