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ME Set-1
Heat Transfer Refrigeration and Air Conditioning
161

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

161) When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by

operating the machine at higher speeds

operating the machine at lower speeds

raising the higher temperature

lowering the higher temperature

Answer is:

lowering the higher temperature

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

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Related Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

162) The refrigerant carbon dioxide is not widely used because of its __________ power require ments per tonne of refrigeration and high operating pressures.

low

high

normal

none of these

Answer is:

high

163) The by-pass factor of a cooling coil decreases with

decrease in fin spacing and increase in number of rows

increase in fin spacing and increase in number of rows

increase in fin spacing and decrease in number of rows

decrease in fin spacing and decrease in number of rows

Answer is:

decrease in fin spacing and increase in number of rows

164) Dehydration is the process of removing water vapour from the surrounding air.

Right

Wrong

Answer is:

Right

165) The cooling of air, without any change in its specific humidity, is known as sensible cooling.

Correct

Incorrect

Answer is:

Correct

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

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