121. The counter-current flow heat exchanger can transfer __________ heat than parallel flow heat exchanger.
less
more
✅ The correct answer is option B.
Heat Transfer, Refrigeration and Air Conditioning MCQs
122. A one tonne refrigerating machine means that
one tonne is the total mass of machine
one tonne refrigerant is used
one tonne of water can be converted into ice
one tonne of ice when
✅ The correct answer is option D.
123. The critical pressure of a liquid is the pressure
above which a liquid will remain a liquid
above which a liquid will explode
above which a liquid will always convert into a vapour
below which a liquid w
✅ The correct answer is option A.
124. The dehumidification process, on the psychrometric chart, is shown by
horizontal Sine
vertical line
inclined line
curved line
✅ The correct answer is option B.
125. The process of adding moisture to the air, without change in its dry bulb temperature, is known as humidification.
Agree
Disagree
✅ The correct answer is option A.
126. A Bell Coleman refrigerator working on dense air system as compared to open air system, for the same range of temperature, results in __________ power per tonne of refrigeration.
same
lower
higher
✅ The correct answer is option B.
127. The temperature of air recorded by a thermometer, when the moisture present in it begins to condense, is called wet bulb temperature.
Yes
No
✅ The correct answer is option B.
128. In absorption vapour systems, the refrigerant widely used is R-12.
Correct
Incorrect
✅ The correct answer is option B.
129. The coefficient of performance of electrolux refrigerator is the ratio of
heat supplied by the gas burner to the heat absorbed by the evaporator
heat absorbed by the evaporator to the heat supplied by the gas burner
heat supplied by the gas burner minus the heat absorbed by the evaporator to the heat supplied by the gas burner
heat absorbed by the e
✅ The correct answer is option B.
130. The rato of energy transferred by convection to that by conduction is called
Stanton number
Nusselt number
Biot number
Peclet number
✅ The correct answer is option B.