Question

22
Thermal conductivity is defined as the heat flow per unit time
a) When the temperature gradient is unity
b) Across the wall with no temperature
c) Through a unit thickness of the wall
d) Across unit area where the temperature gradient is unity
O Option a
O Option b
Options​

Answer 1

Answer:

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Answer 2

Explanation:

his set of Heat Transfer Multiple Choice Questions & Answers (MCQs) focuses on “Thermal Conductivity Of Materials”.

1. Thermal conductivity is defined as the heat flow per unit time

a) When the temperature gradient is unity

b) Across the wall with no temperature

c) Through a unit thickness of the wall

d) Across unit area where the temperature gradient is unity

View Answer

Answer: d

Explanation: Thermal conductivity of a material is because of migration of free electrons and lattice vibrational waves.