Explore topic-wise MCQs in Heat Transfer.

This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer knowledge and support exam preparation. Choose a topic below to get started.

1.

Identify the correct relation between Biot number and Fourier number

A. 4 b T = B I F 0
B. 2 b T = B I F 0
C. 3 b T = B I F 0
D. b T = B I F 0
Answer» E.
Discussion
2.

Fourier number is given by

A. α T/LC2
B. 2 α T/LC2
C. 3 α T/LC2
D. 4 α T/LC2
Answer» B. 2 α T/LC2
Discussion
3.

For a plat plate (thickness δ, breadth b and height h) the heat exchange occurs from both the sides. The characteristics length is equal to

A. δ/4
B. δ/3
C. δ/2
D. δ
Answer» D. δ
Discussion
4.

The quantity h L C/k is known as

A. Biot number
B. Fourier number
C. Stanton number
D. Nusselt number
Answer» B. Fourier number
Discussion
5.

During heat treatment, cylindrical pieces of 25 mm diameter, 30 mm height and at 30 degree Celsius are placed in a furnace at 750 degree Celsius with convective coefficient 80 W/m2 degree. Calculate the time required to heat the pieces to 600 degree Celsius. Assume the following property valuesDensity = 7850 kg /m3Specific heat = 480 J/kg KConductivity = 40 W/m degree

A. 226 sec
B. 326 sec
C. 426 sec
D. 526 sec
Answer» C. 426 sec
Discussion
6.

A gold ring (k = 65 W/m K) measuring 15 * 10 * 60 cm is exposed to a surface where h = 11.5 W/m2 K. Find the value of biot number

A. 0.68
B. 0.58
C. 0.48
D. 0.38
Answer» D. 0.38
Discussion
7.

FOURIER_NUMBER_IS_GIVEN_BY?$

A. α T/L<sub>C</sub><sup>2</sup>
B. 2 α T/L<sub>C</sub><sup>2</sup>
C. 3 α T/L<sub>C</sub><sup>2</sup>
D. 4 α T/L<sub>C</sub><sup>2</sup>
Answer» B. 2 ‚âà√≠¬¨¬± T/L<sub>C</sub><sup>2</sup>
Discussion
8.

Identify_the_correct_relation_between_Biot_number_and_Fourier_number$

A. 4 b T = B<sub> I </sub>F <sub>0</sub>
B. 2 b T = B<sub> I </sub>F <sub>0</sub>
C. 3 b T = B<sub> I </sub>F <sub>0</sub>
D. b T = B<sub> I </sub>F <sub>0</sub>
Answer» E.
Discussion
9.

For a plat plate (thickness δ, breadth b and height h) the heat exchange occurs from both the sides. The characteristics length is equal t?#

A. δ/4
B. δ/3
C. δ/2
D. δ
Answer» D. ‚âà√≠¬¨‚Ä¢
Discussion
10.

The quantity h L C/k is known as

A. Biot number
B. Fourier number
C. Stanton number
D. Nusselt number
Answer» B. Fourier number
Discussion
11.

In the non-dimensional Biot number, the characteristics length is the ratio of

A. Perimeter to surface area of solid
B. Surface area to perimeter of solid
C. Surface area to volume of solid
D. Volume of solid to its surface area
Answer» E.
Discussion
12.

Lumped parameter analysis for transient heat conduction is essentially valid for

A. B <sub>I</sub> < 0.1
B. 1 < B <sub>I</sub> < 10
C. 0.1 < B <sub>I</sub> < 0.5
D. It tends to infinity
Answer» B. 1 < B <sub>I</sub> < 10
Discussion
13.

Which of the following dimensionless number gives an indication of the ratio of internal (conduction) resistance to the surface (convective) resistance?

A. Biot number
B. Fourier number
C. Stanton number
D. Nusselt number
Answer» B. Fourier number
Discussion
14.

In the lumped system parameter model, the variation of temperature with time is

A. Linear
B. Exponential
C. Sinusoidal
D. Cube
Answer» C. Sinusoidal
Discussion
15.

A gold ring (k = 65 W/m K) measuring 15 * 10 * 60 cm is exposed to a surface where h = 11.5 W/m2 K. Find the value of biot number

A. 0.68
B. 0.58
C. 0.48
D. 0.38
Answer» D. 0.38
Discussion