Heat Transfer In case of vertical tube evaporator, with increase in liquor level, the overall heat transfer co-efficient Is not affected Increases Decreases May increase or decrease; depends on the feed Is not affected Increases Decreases May increase or decrease; depends on the feed ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer If Prandtl number is greater than the Schmidt number, then the none of the listed here thermal & concentration boundary layers are of equal thickness concentration boundary layer lies inside the thermal boundary layer thermal boundary layer lies inside the concentration boundary layer none of the listed here thermal & concentration boundary layers are of equal thickness concentration boundary layer lies inside the thermal boundary layer thermal boundary layer lies inside the concentration boundary layer ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Nusselt number is a function of Prandtl number and __________ number of fluid in natural convection heat transfer. Reynolds Stantan Biot Grashoff Reynolds Stantan Biot Grashoff ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In the equation Q = UAΔt; Δt is The difference of average bulk temperatures of hot and cold fluids Arithmetic mean temperature difference Geometric mean temperature difference Logarithmic mean temperature difference The difference of average bulk temperatures of hot and cold fluids Arithmetic mean temperature difference Geometric mean temperature difference Logarithmic mean temperature difference ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The absorptivity of a grey body at a given temperature __________ with increasing wavelength of radiation. Remains constant Decreases Increases May increase or decrease ; depends on the material Remains constant Decreases Increases May increase or decrease ; depends on the material ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 1000 Kg of liquid at 30°C in a well stirred vessel has to be heated to 120°C, using immersed coils carrying condensing steam at 150°C. The area of the steam coils is 1.2 m² and the overall heat transfer co-efficient to the liquid is 1500 W/m².°C. Assuming negligible heat loss to the surrounding and specific heat capacity of the liquid to be 4 kJ/kg.°C, the time taken for the liquid to reach desired temperature will be 44 min 51 min 22 min 15 min 44 min 51 min 22 min 15 min ANSWER DOWNLOAD EXAMIANS APP
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