Heat Transfer Dietus-Boelter equation used for the determination of heat transfer co-efficient is valid when Grashhoff number is very important none of the listed here for fluids in laminar flow for fluids in tubulent flow when Grashhoff number is very important none of the listed here for fluids in laminar flow for fluids in tubulent flow ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Controlling heat transfer film co-efficient is the one, which offers __________ resistance to heat transfer. no lower the least the largest no lower the least the largest ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For shell and tube heat exchanger, with increasing heat transfer area, the purchased cost per unit heat transfer area Passes through a maxima Remains constant Decreases Increases Passes through a maxima Remains constant Decreases Increases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For concentrating an aqueous solution of a material like anhydrous Na₂SO₄, whose solubility decreases with rise in temperature, the most suitable evaporator is a __________ evaporator. Backward feed High pressure None of these Vacuum Backward feed High pressure None of these Vacuum ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For what value of Prandtl number, St = f/2? > 1 1.5 2 1 > 1 1.5 2 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Overall heat transfer co-efficient for cooling of hydrocarbons by water is about 50 -100 BTU/hr. ft.2°F 50 -100 Kcal/hr.m².°C 50 -100 W/m² . °K 1000 - 1500 BTU/hr. ft.2°F 50 -100 BTU/hr. ft.2°F 50 -100 Kcal/hr.m².°C 50 -100 W/m² . °K 1000 - 1500 BTU/hr. ft.2°F ANSWER DOWNLOAD EXAMIANS APP
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