Explore topic-wise MCQs in Heat Transfer Questions and Answers.

This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.

The oven of an electric store, of total outside surface area 2.9 m2 dissipates electric energy at the rate of 600 W. The surrounding room air is at 20 degree Celsius and the surface coefficient of heat transfer between the room air and the surface of the oven is estimated to be 11.35 W/m 2 degree. Determine the average steady state temperature of the outside surface of the store

A. 38.22 degree Celsius
B. 48.22 degree Celsius
C. 58.22 degree Celsius
D. 68.22 degree Celsius
Answer» B. 48.22 degree Celsius
Discussion
2.

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
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 per m2 based on inside area

A. – 63.79 W/m2
B. – 73.79 W/m2
C. – 83.79 W/m2
D. – 93.79 W/m2
Answer» C. – 83.79 W/m2
Discussion
4.

The thermal resistance for heat conduction through a hollow sphere of inner radius r1 and outer radius r2 is

A. r 2 – r 1/4πk r 1r 2
B. r 2 /4πk r 1r 2
C. r 1/4πk r 1r 2
D. 4πk r 1r 2
Answer» B. r 2 /4πk r 1r 2
Discussion