According to Wien’s law, the wavelength corresponding to maximum energy is proportion to ________________?

Question: In a multipass shell and tube heat exchanger, tube side return pressure loss is equal to __________ the velocity head.
[A].

twice

[B].

four times

[C].

square root of

[D].

square of

Answer: Option B

Explanation:

No answer description available for this question.

Question: A black body when hot, emits heat radiation of __________ wavelengths.
[A].

small

[B].

large

[C].

all

[D].

one fixed

Answer: Option C

Explanation:

No answer description available for this question.

Question: A concentric double pipe heat exchanger as compared to the shell and tube heat exchanger for the same heat load requires
[A].

less heating surface.

[B].

more space.

[C].

lower maintenance cost.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient
[A].

continues to increase.

[B].

continues to decrease.

[C].

goes through a minimum.

[D].

goes through a maximum.

Answer: Option C

Explanation:

No answer description available for this question.