Heat Transfer The actual temperature drop across the heating surface in an evaporator depends on the All of these Depth of liquid over heating surface Feed Pressure difference between steam chest and vapour space All of these Depth of liquid over heating surface Feed Pressure difference between steam chest and vapour space ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is the most controlling factor for the rate of bubble detachment from the hot solid surface? Liquid density Liquid viscosity Interfacial tension Hot surface temperature Liquid density Liquid viscosity Interfacial tension Hot surface temperature ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Log mean temperature difference (LMTD) cannot be used, if heat transfer co-efficient over the entire heat exchanger is not constant the heat capacity is not constant and there is a phase change. none of the listed here there exists an unsteady state heat transfer co-efficient over the entire heat exchanger is not constant the heat capacity is not constant and there is a phase change. none of the listed here there exists an unsteady state 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? Temperature difference between the two surfaces of the wall Material of the wall Thickness of the wall Area of the wall perpendicular to heat flow Temperature difference between the two surfaces of the wall Material of the wall Thickness of the wall Area of the wall perpendicular to heat flow ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is the most widely used heat insulating material for pipelines carrying steam? Fireclay refractory followed by aluminium sheet Tar dolomite bricks followed by asbestos Cotton followed by aluminium foil 85% magnesia cement and glass wool Fireclay refractory followed by aluminium sheet Tar dolomite bricks followed by asbestos Cotton followed by aluminium foil 85% magnesia cement and glass wool ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For flow over a flat plate, the ratio of thermal boundary layer thickness, 'xt' and hydrodynamic boundary layer thickness 'x' is equal to (where, NPr = Prandtl number) NPr-1/3 NPr-1 NPr NPr1/3 NPr-1/3 NPr-1 NPr NPr1/3 ANSWER DOWNLOAD EXAMIANS APP
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