Heat Transfer With increase in temperature, the thermal conductivity of steel Increases exponentially Increases Decreases Remains unchanged Increases exponentially Increases Decreases Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer occurs by natural convection because change in temperature causes difference in Density Heat capacity Thermal conductivity Viscosity Density Heat capacity Thermal conductivity Viscosity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer An ejector is used to Increase pressure Remove condensate None of these Increase temperature Increase pressure Remove condensate None of these Increase temperature ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A cube, sphere & a thin circular plate (all having same mass and made of same material) are all heated to 300°C and allowed to cool in natural air. Which one will cool the slowest ? Cube Plate Sphere All of these Cube Plate Sphere All of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A composite flat wall of a furnace is made of two materials 'A' and 'B'. The thermal conductivity of 'A' is twice of that of material 'B', while the thickness of layer of 'A' is half that of B. If the temperature at the two sides of the wall are 400 and 1200°K, then the temperature drop (in °K) across the layer of material 'A' is 125 160 133 150 125 160 133 150 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer While the total emissivity of a perfect black body is unity, the same for a real body is >1 between 0 and 1 0 1 >1 between 0 and 1 0 1 ANSWER DOWNLOAD EXAMIANS APP
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