Heat Transfer Log mean temperature difference (LMTD) cannot be used, if the heat capacity is not constant and there is a phase change. none of the listed here heat transfer co-efficient over the entire heat exchanger is not constant there exists an unsteady state the heat capacity is not constant and there is a phase change. none of the listed here heat transfer co-efficient over the entire heat exchanger is not constant there exists an unsteady state ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For small temperature difference, the heat transfer rate as per Newton's law of cooling is proportional to (where, Δt = excess temperature) Δt³ √Δt Δt Δt² Δt³ √Δt Δt Δt² ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat sensitive materials can be concentrated in an evaporator employing High residence time High pressure Vacuum None of these High residence time High pressure Vacuum None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Dietus-Boelter equation used for the determination of heat transfer co-efficient is valid for fluids in laminar flow when Grashhoff number is very important for fluids in tubulent flow none of the listed here for fluids in laminar flow when Grashhoff number is very important for fluids in tubulent flow none of the listed here ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Viscous & heat sensitive liquids are concentrated in __________ evaporators. Agitated film Open pan Long tube None of these Agitated film Open pan Long tube None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Choose the most important factor on which the heat conducted through a wall in a unit time will depend on? Thickness of the wall Area of the wall perpendicular to heat flow Material of the wall Temperature difference between the two surfaces of the wall Thickness of the wall Area of the wall perpendicular to heat flow Material of the wall Temperature difference between the two surfaces of the wall ANSWER DOWNLOAD EXAMIANS APP
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