Heat Transfer Double pipe heat exchangers are used when heat transfer area required is very low because it is less costly when heat transfer area required is very high because it occupies less floor area when heat transfer area required is very low because it is less costly when heat transfer area required is very high because it occupies less floor area ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer An ejector is used to Remove condensate None of these Increase temperature Increase pressure Remove condensate None of these Increase temperature Increase pressure ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Vacuum is generally maintained in the vapour space of an evaporator mainly to Facilitate forward feeding in multiple effect evaporation Get economical temperature difference by using moderate pressure steam Achieve very high concentration of the final product Concentrate heat sensitive materials Facilitate forward feeding in multiple effect evaporation Get economical temperature difference by using moderate pressure steam Achieve very high concentration of the final product Concentrate heat sensitive materials ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Bulk of the convective heat transfer resistance from a hot tube surface to the fluid flowing in it, is In the central core of the fluid None of these Uniformly distributed throughout the fluid Mainly confined to a thin film of fluid near the surface In the central core of the fluid None of these Uniformly distributed throughout the fluid Mainly confined to a thin film of fluid near the surface ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Prandtl and Reynolds analogy are same, when Prandtl number is 0.5 > 2 1.5 1 0.5 > 2 1.5 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The outlet temperature of cooling water in a heat exchanger is generally not allowed to exceed above 50°C in industrial practice mainly to avoid Uneconomic LMTD Decrease in heat exchanger efficiency Its evaporation loss Excessive corrosion Uneconomic LMTD Decrease in heat exchanger efficiency Its evaporation loss Excessive corrosion ANSWER DOWNLOAD EXAMIANS APP