174) Choose the wrong statement

Temperature of medium being cooled must be below that of the evaporator

Refrigerant leaves the condenser as liquid

All solar thermally operated absorption systems are capable only of intermittent operation

frost on evaporator reduces heat transfer

Answer is:

Temperature of medium being cooled must be below that of the evaporator

Heat transfer MCQ with Answers

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175) Under-cooling in a refrigeration cycle

increases COP

decreases COF

COP remains unaltered

other factors decide COP

Answer is:

increases COP

176) For obtaining high COP, the pressure range of compressor should be

high

low

optimum

any value

Answer is:

low

177) The coefficient of performance is the ratio of the refrigerant effect to the

heat of compression

work done by compressor

enthalpy increase in compressor

all of the above

Answer is:

all of the above

178) The C.O.P of a refrigeration cycle with increase in evaporator temperature, keeping condenser temperature constant, will

increase

decrease

remain unaffected

may increase or decrease depending on the type of refrigerant used

Answer is:

increase

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174) Choose the wrong statement

Temperature of medium being cooled must be below that of the evaporator

Heat transfer MCQ with Answers

Related Heat transfer MCQ with Answers

175) Under-cooling in a refrigeration cycle

increases COP

176) For obtaining high COP, the pressure range of compressor should be

low

177) The coefficient of performance is the ratio of the refrigerant effect to the

all of the above

178) The C.O.P of a refrigeration cycle with increase in evaporator temperature, keeping condenser temperature constant, will

increase

Heat transfer MCQ with Answers