Heat and Mass Transfer Thermal conductivity of air at room temperature in kcal/m hr °C is of the order of 0.02 0.1 0.002 0.01 0.02 0.1 0.002 0.01 ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The rate of heat flow through a body is Q = [kA (T₁ - T₂)]/x. The term x/kA is known as Thermal resistance None of these Thermal coefficient Thermal conductivity Thermal resistance None of these Thermal coefficient Thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Metals are good conductors of heat because Their atoms collide frequently They have high density Their atoms are relatively far apart They contain free electrons Their atoms collide frequently They have high density Their atoms are relatively far apart They contain free electrons ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer A steam pipe is to be lined with two layers of insulating materials of different thermal conductivities. For the minimum heat transfer, The better insulation must be put outside The better insulation must be put inside One could place either insulation on either side One should take into account the steam temperature before deciding as to which insulation is put where The better insulation must be put outside The better insulation must be put inside One could place either insulation on either side One should take into account the steam temperature before deciding as to which insulation is put where ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Total heat is the heat required to Increase the temperature of a liquid or vapour Change liquid into vapour Change vapour into liquid Convert water into steam and superheat it Increase the temperature of a liquid or vapour Change liquid into vapour Change vapour into liquid Convert water into steam and superheat it ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The amount of heat flow through a body by conduction is All of these Directly proportional to the temperature difference on the two faces of the body Directly proportional to the surface area of the body Dependent upon the material of the body All of these Directly proportional to the temperature difference on the two faces of the body Directly proportional to the surface area of the body Dependent upon the material of the body ANSWER DOWNLOAD EXAMIANS APP
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