Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

186) R-12 is generally preferred over R-22 in deep freezers since

Answer is:

it is miscible with oil over large range of temperatures

187) The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed to the air, is called

Answer is:

wet bulb temperature

188) During sub-cooling, sensible heat from a liquid refrigerant is removed.

Answer is:

Yes

189) If the energy radiated per second per sq. cm. of the surface for wave lengths lying between ?, and ? + d? is represented by (e?.d?), then e? is called

Answer is:

emissive power

190) Dry bulb temperature is the temperature of air recorded by a thermometer, when

Answer is:

it is not affected by the moisture present in the air

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