Heat Transfer Vacuum is generally maintained in the vapour space of an evaporator mainly to Achieve very high concentration of the final product Get economical temperature difference by using moderate pressure steam Concentrate heat sensitive materials Facilitate forward feeding in multiple effect evaporation Achieve very high concentration of the final product Get economical temperature difference by using moderate pressure steam Concentrate heat sensitive materials Facilitate forward feeding in multiple effect evaporation ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The Sieder-Tate correlation for heat transfer in turbulent flow in pipe gives Nu α Re0.8, where, Nu is the Nusselt number and Re is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer co-efficient varies with the pipe diameter (D) as (D)-0.2 (D)-1.8 (D)0.2 (D)1.8 (D)-0.2 (D)-1.8 (D)0.2 (D)1.8 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Multiple effect evaporation is generally recommended, when the Evaporation on small scale is to be done Corrosive liquids are to be concentrated Large scale evaporation of liquor is needed Fuel is cheaply available Evaporation on small scale is to be done Corrosive liquids are to be concentrated Large scale evaporation of liquor is needed Fuel is cheaply available ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The average heat transfer co-efficient for laminar film condensation on vertical surface is inversely proportional to (where, ΔT = Temperature drop across condensate film ) None of the listed here (ΔT)1/4 (ΔT)2 ΔT None of the listed here (ΔT)1/4 (ΔT)2 ΔT ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Thermal diffusivity of a material Is defined as K/ρ . Cp Has the unit m² /sec Is the ratio of thermal conductivity to thermal capacity All of these Is defined as K/ρ . Cp Has the unit m² /sec Is the ratio of thermal conductivity to thermal capacity All of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Conduction occurs in the buffer zone for a fluid flowing through a heated pipe, only when Prandtl number is >1 0.1 L < 1 >1 0.1 L < 1 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS