GATE ME 2002 | Heat Exchangers Question 24 | Heat Transfer

GATE ME 2002

MCQ (Single Correct Answer)

-0.3

For the same inlet and outlet temperatures of hot and cold fluids, the Log mean temperature Difference $$(LMTD)$$ is

greater for parallel flow heat exchanger than for counter flow heat exchanger.

greater for counter flow heat exchanger than for parallel flow heat exchanger.

same for both parallel and counter flow heat exchangers.

dependent on the properties of the fluids.

GATE ME 1994

MCQ (Single Correct Answer)

-0.3

The practice to use steam on the shell side and cooling water on the tube side in condensers of steam power plant is because

to increase overall heat transfer coefficient water side velocity can be increased if water is on the tube side

condenser can act as a storage unit for condensed steam

rate of condensation of steam is invariably smaller than the mass flow rate of cooling water

it is easier to maintain vacuum on the shell side than on the tube side

GATE ME 1991

MCQ (Single Correct Answer)

-0.3

In shell and tube heat exchanger, baffles are mainly used to

Increase the mixing of fluid

Increase the heat transfer area

deflect the flow in desired direction

Reduce fouling of the tube surface .

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