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Heat Transfer

Q1: In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is __________ the outlet temperature of the cold fluid.

A equal to

B more than

C less than

D either more or less than (depending upon the fluid)

ANS:A - equal to

In a parallel flow heat exchanger, where the hot and cold fluids flow in the same direction, the lowest temperature theoretically attainable by the hot fluid is equal to the outlet temperature of the cold fluid. This occurs at the end of the heat exchange process when the temperature difference between the hot and cold fluids approaches zero. So, the correct answer is: "equal to"



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