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Question: A heat exchanger with heat transfer surface area A and overall heat transfer coefficient U handles two fluids of heat capacities Cmax and Cmin. The number of transfer units (NTU) used in the analysis of heat exchanger is specified as
[A].

[B].

[C].

AU Cmin

[D].

Answer: Option D

Explanation:

No answer description available for this question.

Question: In a shell and tube heat exchanger, baffles are provided on the shell side to
[A].

improve heat transfer

[B].

provide support for tubes

[C].

prevent stagnation of shell side fluid

[D].

all of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: Fouling factor is used
[A].

in heat exchanger design as a safety factor

[B].

in case of Newtonian fluids

[C].

when a liquid exchanges heat with a gas

[D].

none of the above

Answer: Option A

Explanation:

No answer description available for this question.

Question: The automobile radiator is a heat exchanger of
[A].

parallel flow type

[B].

counter flow type

[C].

cross flow type

[D].

regenerator type

Answer: Option C

Explanation:

No answer description available for this question.

Question: In counter-current flow heat exchangers
[A].

both the fluids at inlet are in their hottest state

[B].

both the fluids at inlet are in their coldest state

[C].

both the fluids at exit are in their hottest state

[D].

one fluid is coldest and the other is hottest at inlet

Answer: Option A

Explanation:

No answer description available for this question.

Question: In counter-current flow heat exchanger, the logarithmic temperature difference between the fluids is __________ as compared to parallel flow heat exchanger.
[A].

same

[B].

less

[C].

greater

Answer: Option C

Explanation:

No answer description available for this question.

Question: In a parallel flow heat exchanger, the rate of flow of heat and the rate of decrease of temperature are maximum.
[A].

Yes

[B].

No

Answer: Option A

Explanation:

No answer description available for this question.

Question: Logarithmic mean temperature difference is the same as the arithmetic mean temperature difference.
[A].

Agree

[B].

Disagree

Answer: Option B

Explanation:

No answer description available for this question.

Question: A device used for transfering heat from one fluid to another is called heat exchanger.
[A].

True

[B].

False

Answer: Option A

Explanation:

No answer description available for this question.