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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
For unsaturated air, the dew point temperature is __________ wet bulb temperature.

None of these
More than
Equal to
Less than

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Refrigeration and Air Conditioning
Air refrigeration operates on

Reversed Carnot cycle
Rankine’s cycle
Carnot cycle
Brayton cycle

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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

2 kW
3 kW
1 kW
4 kW

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Refrigeration and Air Conditioning
Which of the following is not a desirable property of a refrigerant?

Good electrical conductor
Low boiling point
Large latent heat
High risibility with oil

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Refrigeration and Air Conditioning
In a refrigerating machine, heat rejected is _________ heat absorbed.

Equal to
Greater than
Less than
None of these

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Refrigeration and Air Conditioning
The condition of refrigerant after passing through the condenser in a vapour compression system is

Wet vapour
Dry saturated vapour
Saturated liquid
Superheated vapour

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