Heat and Mass Transfer In free convection heat transfer transition from laminar to turbulent flow is governed by the critical value of the Prandtl number, Grashoff's number Grashoff's number Reynold's number, Grashoff's number Reynold's number Prandtl number, Grashoff's number Grashoff's number Reynold's number, Grashoff's number Reynold's number ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal conductivity of non-metallic amorphous solids with decrease in temperature Increases Remain constant May increase or decrease depending on temperature Decreases Increases Remain constant May increase or decrease depending on temperature Decreases ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The ratio of the thickness of thermal boundary layer to the thickness of hydrodynamic boundary layer is equal to (Prandtl number) n, where n is equal to 1 -1 =-2/3 =-1/3 1 -1 =-2/3 =-1/3 ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer In a shell and tube heat exchanger, baffles are provided on the shell side to Prevent stagnation of shell side fluid All of these Improve heat transfer Provide support for tubes Prevent stagnation of shell side fluid All of these Improve heat transfer Provide support for tubes ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The transfer of heat by molecular collision is known as Radiation None of these Convection Conduction Radiation None of these Convection Conduction ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer If the temperature of a solid surface changes form 27°C to 627°C, then its emissive power changes in the ratio of 9 3 81 270 9 3 81 270 ANSWER DOWNLOAD EXAMIANS APP
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