Thermal conductivity of a material does not depend upon its (A) Mass (B) Volume (C) Surface area (D) All 'a', 'b' & 'c'

Thermal conductivity of a material does not depend upon its (A) Mass
(B) Volume
(C) Surface area
(D) All 'a', 'b' & 'c'
by

1 Answer

Answer :

(D) All 'a', 'b' & 'c'
by

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If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows __________ law. (A) Hyperbolic (B) Parabolic (C) Linear (D) Logarithmic

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The critical radius of insulation for a spherical shell is (where, K = thermal conductivity of insulating material h0 = heat transfer coefficient at the outer surface) (A) K/h0 (B) 2K/h0 (C) h0 /K (D) h0 /2K

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reduction in thermal resistance during heat transfer does not occur in the (A) Convection heat transfer by stirring the fluid and cleaning the heating surface (B) Conduction heat transfer by reduction in the material thickness and increase in the thermal conductivity (C) Radiation heat transfer by increasing the temperature and reducing the emissivity (D) None of these

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