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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Carbon dioxide is

All of the listed here
Odourless
Colourless
Non-flammable

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Refrigeration and Air Conditioning
Wet bulb temperature is the temperature of air recorded by a thermometer, when

The moisture present in it begins to condense
None of these
Its bulb is surrounded by a wet cloth exposed to the air
It is not affected by the moisture present in the air

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

More than
Less than
Equal to
None of these

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Refrigeration and Air Conditioning
The evaporator used in household refrigerators is

Defrosting evaporator
Frosting evaporator
None of these
Non-frosting evaporator

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Refrigeration and Air Conditioning
The operating temperature of a cold storage is -2°C. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40°C. The actual C.O.P. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. The power required to drive the plant is

7.44 kW
1.86 kW
3.72 kW
18.6 kW

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Refrigeration and Air Conditioning
Moisture should be removed from refrigerants to avoid

Corrosion of steel plates
Freezing at the expansion valve
All of these
Restriction to refrigerant flow

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MORE MCQ ON Refrigeration and Air Conditioning

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