243) In a reversed Brayton cycle, the heat is absorbed by the air during

isentropic compression process

constant pressure cooling process

isentropic expansion process

constant pressure expansion process

Answer is:

constant pressure expansion process

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

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244) Wet bulb temperature is the temperature of air recorded by a thermometer, when

it is not effected by the moisture present in the air

its bulb is surrounded by a wet cloth exposed to the air

the moisture present in it begins to condense

none of the above

Answer is:

its bulb is surrounded by a wet cloth exposed to the air

245) A device used for transfering heat from one fluid to another is called heat exchanger.

Right

Wrong

Answer is:

Right

246) The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by

(C.O.P.)_P = (C.O.P.)_R + 2

(C.O.P.)_P = (C.O.P.)_R + 1

(C.O.P)_P = (C.O.P)_R - 1

(C.O.P)_P = (C.O.P)_R

Answer is:

(C.O.P.)_P = (C.O.P.)_R + 1

247) The temperature below which a gas is always liquified, is known as critical temperature.

Correct

Incorrect

Answer is:

Incorrect

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

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243) In a reversed Brayton cycle, the heat is absorbed by the air during

constant pressure expansion process

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

Related Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

244) Wet bulb temperature is the temperature of air recorded by a thermometer, when

its bulb is surrounded by a wet cloth exposed to the air

245) A device used for transfering heat from one fluid to another is called heat exchanger.

Right

246) The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by

(C.O.P.)P = (C.O.P.)R + 1

247) The temperature below which a gas is always liquified, is known as critical temperature.

Incorrect

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

(C.O.P.)_P = (C.O.P.)_R + 1