Heat and Mass Transfer Unit of thermal conductivity in S.I. units is J/m² sec J/m °K sec Option (B) and (C) above W/m °K J/m² sec J/m °K sec Option (B) and (C) above W/m °K ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Heat conducted through per unit area and unit thick face per unit time when temperature difference between opposite faces is unity, is called Thermal conductivity Temperature gradient Thermal resistance Thermal coefficient Thermal conductivity Temperature gradient Thermal resistance Thermal coefficient ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The amount of heat flow through a body by conduction is Dependent upon the material of the body All of these Directly proportional to the surface area of the body Directly proportional to the temperature difference on the two faces of the body Dependent upon the material of the body All of these Directly proportional to the surface area of the body Directly proportional to the temperature difference on the two faces of the body ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Cork is a good insulator because it has Atoms colliding frequency Free electrons Porous body Low density Atoms colliding frequency Free electrons Porous body Low density ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The process of heat transfer from one particle of the body to another by the actual motion of the heated particles, is called Conduction Radiation None of these Convection Conduction Radiation None of these Convection ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer An electric cable of aluminium conductor (k = 240 W/mK) is to be insulated with rubber (k = 0.15 W/mK). The cable is to be located in air (h = 6 W/m²). The critical thickness of insulation will be 800 mm 160 mm 25 mm 40 mm 800 mm 160 mm 25 mm 40 mm ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS