Heat Transfer - Section 1 (2)

Directions to Solve

Heat Transfer - Section 1

In this section of Heat Transfer, you will find the MCQs related to this field
and can submit your answers easily.

9.

Controlling heat transfer film co-efficient is the one, which offers __________ resistance to heat transfer.

A.	no
B.	the least
C.	the largest
D.	lower

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

10.

The equivalent diameter for pressure drop is __________ that for heat transfer.

A.	smaller than
B.	greater than
C.	equal to
D.	not related with

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

11.

Increasing the liquor level in the evaporator results in the

A.	decreased capacity.
B.	increase in liquor film co-efficient.
C.	decreased effect of hydrostatic head.
D.	increased true temperature drop.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

12.

Economy of a multiple effect evaporator is not influenced much by the

A.	boiling point elevations
B.	temperature of the feed
C.	rate of heat transfer
D.	ratio of the weight of the thin liquor to thick liquor

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

13.

Pick out the wrong statement.

A.	In case of heat transfer by purely forced convection, GR/Re2 â‰¤ 1.
B.	The equivalent diameter of heat transfer for a duct of square cross-section (having each side as 'x') is equal to 4x.
C.	Distillation process is not the same as evaporation.
D.	The effectiveness of nucleate boiling depends basically on the ease with which the bubbles are formed and detached from the heating surface.

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

14.

The number of kg vaporised per kg of steam fed to the evaporator is defined as

A.	capacity
B.	rate of evaporation
C.	economy
D.	rate of vaporisation

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

15.

The unit of heat transfer co-efficient in SI unit is

A.	J/M2Â°K
B.	W/m2Â°K
C.	W/mÂ°K
D.	J/mÂ°K

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

16.

Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is

A.	finned tube heat exchanger with air inside and steam outside.
B.	finned tube heat exchanger with air outside and steam inside.
C.	shell and tube heat exchanger with air inside tubes and steam on shell side.
D.	shell and tube heat exchanger with air on shell side and steam inside tubes.

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

1
2
3
4
5
6
7