Heat Transfer Vacuum is generally maintained in the vapour space of an evaporator mainly to 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 Achieve very high concentration of the final product ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The Grashoff number is defined as the ratio of the buoyancy to surface tension forces buoyancy to inertial forces inertial to viscous forces. buoyancy to viscous forces buoyancy to surface tension forces buoyancy to inertial forces inertial to viscous forces. buoyancy to viscous forces 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)-1.8 (D)-0.2 (D)1.8 (D)0.2 (D)-1.8 (D)-0.2 (D)1.8 (D)0.2 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A black body does not __________ radiation. Reflect Absorb or emit Refract Both B & C Reflect Absorb or emit Refract Both B & C ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m².K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is 894W/m².K 1200W/m².K 333W/m².K 287 W/m².K 894W/m².K 1200W/m².K 333W/m².K 287 W/m².K ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The advantage of backward feed multiple effect evaporators over forward feed units is that Most concentrated liquid is at highest temperature Equal heat transfer co-efficients exist in various effects Heat sensitive material can be handled There is no additional cost of pumping Most concentrated liquid is at highest temperature Equal heat transfer co-efficients exist in various effects Heat sensitive material can be handled There is no additional cost of pumping ANSWER DOWNLOAD EXAMIANS APP
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