Heat Transfer With increase in porosity, the thermal conductivity of a solid substance Remains unchanged May increase or decrease; depends on the solid Decreases Increases Remains unchanged May increase or decrease; depends on the solid Decreases Increases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is Some Either more or less ; depends on the nature of vapor Less More Some Either more or less ; depends on the nature of vapor Less More ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer in the laminar sublayer in case of a liquid flowing through a pipe, is mostly by Conduction None of these Eddies current Convection Conduction None of these Eddies current Convection ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The critical radius 'r' of insulation on a pipe is given by r = k/h r = h/k r = k/2h r = 2k/h r = k/h r = h/k r = k/2h r = 2k/h ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For an ideal black body Emissivity = 0 Reflectivity = 1 Transmissivity = 1 Absorptivity = 1 Emissivity = 0 Reflectivity = 1 Transmissivity = 1 Absorptivity = 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer All analogy equations connecting friction factor and heat transfer co-efficient apply only to Wall or skin friction Turbulent flow Both A and B Form friction Wall or skin friction Turbulent flow Both A and B Form friction ANSWER DOWNLOAD EXAMIANS APP
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