Question

Cork has a low thermal conductivity of _____ W/m K.

(a) 0.01

(b) 0.04

(c) 0.07

(d) 0.1

I have been asked this question by my college director while I was bunking the class.

Query is from Properties of Insulation in chapter Magnetic & Insulating Materials of Engineering Material & Metallurgy

Answer 1

The correct option is (c) 0.07

To explain I would say: Cork is a typical insulating material which has a low thermal conductivity of 0.07 W/m K. This causes the material to be porous in nature. Cotton also has a low thermal conductivity of 0.04 W/m K.