1000+ Heat Transfer Objective Type Questions and Answers - 2

Question: 6

Which one of the following materials will have highest value of thermal conductivity?

(A) aluminium

(B) brass

(C) copper

(D) steel

Question: 7

Heat is transferred from an electric bulb mainly by

(A) radiation

(B) conduction

(C) convection

(D) convection and conduction

Question: 8

Which non metallic body is expected to have highest value of emissivity?

(A) paper

(B) rubber

(C) carbon

(D) iron oxide

Question: 9

Non isotropic conductivity is exhibited in case of

(A) wood

(B) copper

(C) steel

(D) brass

Question: 10

Thermal conductivity of wood least depends on

(A) grain orientation

(B) temperature

(C) density

(D) moisture