Heat Transfer Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the __________ zone. laminar None of the listed here transition highly turbulent laminar None of the listed here transition highly turbulent ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Boiling point elevation of an ideal solution Both B and C In independent of pressure Decreases rapidly with temperature rise Increases rapidly with temperature rise Both B and C In independent of pressure Decreases rapidly with temperature rise Increases rapidly with temperature rise ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The statement that "maximum wavelength of radiation is inversly proportional to the temperature" is __________ law. Wien's displacement Planck's None of these Stefan-Boltzman's Wien's displacement Planck's None of these Stefan-Boltzman's ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer An insulator should have Less resistance to heat flow A porous structure High thermal conductivity Low thermal conductivity Less resistance to heat flow A porous structure High thermal conductivity Low thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Critical value of the __________ number governs the transition from laminar to turbulent flow in free convection heat transfer. Reynolds Grashoff Prandtl & Grashoff Both A & B Reynolds Grashoff Prandtl & Grashoff Both A & B ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Walls of a cubical oven are of thickness l, and they are made of material of thermal conductivity k. The temperature inside the oven is 100°C and the inside heat transfer co-efficient is 3k/l. If the wall temperature on the outside is held at 25°C, what is the inside wall temperature in degree centigrade? 35.5 43.75 48.25 81.25 35.5 43.75 48.25 81.25 ANSWER DOWNLOAD EXAMIANS APP
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