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.

The following data pertains to a hollow cylinder and a hollow sphere made of same material and having the same temperature drop over the wall thickness
Inside radius = 0.1 m and outside surface area = 1 square meter

A. nIf the outside radius for both the geometrics is same, calculate the ratio of heat flow in the cylinder to that of sphere?
B. 0.056
C. 2.345
D. 1.756
E. 3.543
Answer» D. 1.756
Discussion
2.

If we increase the thickness of insulation of a circular rod, heat loss to surrounding due to

A. Convection and conduction increases
B. Convection and conduction decreases
C. Convection decreases while that due to conduction increases
D. Convection increases while that due to conduction decreases
Answer» E.
Discussion
3.

A spherical vessel of 0.5 m outside diameter is insulated with 0.2 m thickness of insulation of thermal conductivity 0.04 W/m degree. The surface temperature of the vessel is 195 degree Celsius and outside air is at 10 degree Celsius. Determine heat flow

A. 47.93 W
B. 57.93 W
C. 67.93 W
D. 77.93 W
Answer» C. 67.93 W
Discussion
4.

A spherical vessel of 0.5 m outside diameter is insulated with 0.2 m thickness of insulation of thermal conductivity 0.04 W/m degree. The surface temperature of the vessel is 195 degree Celsius and outside air is at 10 degree Celsius. Determine heat flow per m2 based on inside area

A. 63.79 W/m<sup>2</sup>
B. 73.79 W/m<sup>2</sup>
C. 83.79 W/m<sup>2</sup>
D. 93.79 W/m<sup>2</sup>
Answer» C. 83.79 W/m<sup>2</sup>
Discussion