Explore topic-wise MCQs in Heat Transfer.

This section includes 2 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.

For insulation to be properly effective in restricting heat transmission, the pipe radius r0 will be

A. Greater than critical radius
B. Less than critical radius
C. Equal to critical radius
D. Greater than or equal to critical radius
Answer» E.
Discussion
2.

A cable of 10 mm outside is to be laid in an atmosphere of 25 degree Celsius (h = 12.5 W/m2 degree) and its surface temperature is likely to be 75 degree Celsius due to heat generated within it. How would the heat flow from the cable be affected if it is insulated with rubber having thermal conductivity k = 0.15 W/m degree?

A. 43.80 W per meter length
B. 53.80 W per meter length
C. 63.80 W per meter length
D. 73.80 W per meter length
Answer» C. 63.80 W per meter length
Discussion