Heat Transfer The wavelength at which the maximum monochromatic emissive power occurs for a black body, is (where, T = absolute temperature of the black body) αT Independent of T α 1/T α T⁴ αT Independent of T α 1/T α T⁴ ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Maximum heat transfer rate is obtained in __________ flow. Creeping Transition region Turbulent Laminar Creeping Transition region Turbulent Laminar ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In forced convection, the Nusselt number is a function of Re and Pr Re and Sc Re and Gr Pr and Gr Re and Pr Re and Sc Re and Gr Pr and Gr ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer co-efficient (h1) for liquids increases with Decreasing Reynolds number None of these Decreasing temperature Increasing temperature Decreasing Reynolds number None of these Decreasing temperature Increasing temperature ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A steel sphere of radius 0.1 m at 400°K is immersed in an oil at 300°K. If the centre of the sphere reaches 350°K in 20 minutes, how long will it take for a 0.05 m radius steel sphere to reach the same temperature (at the centre) under identical conditions ? Assume that the conductive heat transfer co-efficient is infinitely large. 40 minutes 5 minutes 20 minutes 10 minutes 40 minutes 5 minutes 20 minutes 10 minutes ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer With increase in the distance between the heat source and the object receiving the heat, the radiation heat transfer Increases exponentially Remains unaffected Increases Decreases Increases exponentially Remains unaffected Increases Decreases ANSWER DOWNLOAD EXAMIANS APP
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