Explore topic-wise MCQs in Heat Transfer.

This section includes 4 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.

In case of solid cylinder of radius R, the temperature distribution is given as

A. t t<sub> w</sub>/t<sub> max </sub> t<sub> w</sub> = 1 (r/R)<sup>2</sup>
B. t t<sub> w</sub>/t<sub> max </sub> t<sub> w</sub> = 1 (r/R)
C. t t<sub> w</sub>/t<sub> max </sub> t<sub> w</sub> = 1 (r/R)<sup>3</sup>
D. t t<sub> w</sub>/t<sub> max </sub> t<sub> w</sub> = 1 (r/R)<sup>4</sup>
Answer» B. t t<sub> w</sub>/t<sub> max </sub> t<sub> w</sub> = 1 (r/R)
Discussion
2.

The maximum temperature for cylindrical coordinate occurring at r = 0 is

A. t <sub>max </sub>= t <sub>a</sub> +q <sub>g</sub> R/h + q <sub>g</sub> R<sup>2</sup>/4k
B. t <sub>max </sub>= t <sub>a</sub> +q <sub>g</sub> R/4h + q <sub>g</sub> R<sup>2</sup>/4k
C. t <sub>max </sub>= t <sub>a</sub> +q <sub>g</sub> R/2h + q <sub>g</sub> R<sup>2</sup>/4k
D. t <sub>max </sub>= t <sub>a</sub> +q <sub>g</sub> R/6h + q <sub>g</sub> R<sup>2</sup>/4k
Answer» D. t <sub>max </sub>= t <sub>a</sub> +q <sub>g</sub> R/6h + q <sub>g</sub> R<sup>2</sup>/4k
Discussion
3.

For a cylindrical rod with uniformly distributed heat sources, the thermal gradient at half the radius location will be

A. Four times
B. Twice
C. One fourth
D. One half
Answer» E.
Discussion
4.

A concrete column used in bridge construction is cylindrical in shape with a diameter of 1 meter. The column is completely poured in a short interval of time and the hydration of concrete results in the equivalent of a uniform source strength of 0.7 W/kg. Determine the temperature at the center of the cylinder at a time when the outside surface temperature is 75 degree Celsius. The column is sufficiently long so that temperature variation along its length may be neglected. For concreteAverage thermal conductivity = 0.95 W/m K

A. nAverage density = 2300 kg/m<sup>3</sup>
B. 190.92 degree Celsius
C. 180.92 degree Celsius
D. 170.92 degree Celsius
E. 160.92 degree Celsius
Answer» C. 180.92 degree Celsius
Discussion