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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
For air conditioning the operation theater in a hospital, the percentage of outside air in the air supplied is

50
100
Zero
20

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Refrigeration and Air Conditioning
Hydrogen is used in Electrolux refrigeration system so as to _________ the rate of evaporation of the liquid ammonia passing through the evaporator.

None of these
Increase
Equalize
Reduce

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Refrigeration and Air Conditioning
In air-conditioning of aeroplanes, using air as a refrigerant, the cycle used is

Reversed Joule cycle
Reversed Carnot cycle
Reversed Otto cycle
Reversed Brayton cycle

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Refrigeration and Air Conditioning
An important characteristic of absorption system of refrigeration is

noisy operation
quiet operation
very little power consumption
cooling below 0°C

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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
1 kW
2 kW
3 kW

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Refrigeration and Air Conditioning
The thermostatic expansion valve operates on the changes in the

None of these
Degree of superheat at exit from the evaporator
Pressure in the evaporator
Temperature of the evaporator

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MORE MCQ ON Refrigeration and Air Conditioning

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