Heat Transfer With increase in porosity, the thermal conductivity of a solid substance May increase or decrease; depends on the solid Decreases Increases Remains unchanged May increase or decrease; depends on the solid Decreases Increases Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a backward feed multiple effect evaporator None of these No pumps are required between successive effects Feed flows from low pressure to high pressure Feed is introduced in the first effect None of these No pumps are required between successive effects Feed flows from low pressure to high pressure Feed is introduced in the first effect ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The purpose of floating head in a heat exchanger is to Facilitate its lengthening, if needed Avoid buckling of tubes Decrease the pressure drop Provide support for tubes Facilitate its lengthening, if needed Avoid buckling of tubes Decrease the pressure drop Provide support for tubes ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is unimportant in forced convection ? Reynolds number none of the listed here Prandtl number Grashhoff number Reynolds number none of the listed here Prandtl number Grashhoff number ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer At what value of Prandtl number, the hydrodynamic and thermal boundary layers are identical? 80 1.5 1 0.5 80 1.5 1 0.5 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the right face is 10 W/m².K. At steady state, the temperature of the right face in °C is 63.8 48.7 71.2 77.2 63.8 48.7 71.2 77.2 ANSWER DOWNLOAD EXAMIANS APP
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