Heat Transfer The interchange factor for radiation heat transfer from surface 'x' to surface 'y' in case of an infinite parallel planes with emis-sivities εx & εy is given by Εx . εy (εx + εy)/(εx + εy - εx . εy) Εx + εy 1/εx + 1/εy Εx . εy (εx + εy)/(εx + εy - εx . εy) Εx + εy 1/εx + 1/εy ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In case of a multipass shell and tube heat exchanger, providing a baffle on the shell side __________ the heat transfer rate. Decreases May increase or decrease, depends on the type of baffle Increases Does not affect Decreases May increase or decrease, depends on the type of baffle Increases Does not affect ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Vacuum is generally maintained in the vapour space of an evaporator mainly to Concentrate heat sensitive materials Achieve very high concentration of the final product Get economical temperature difference by using moderate pressure steam Facilitate forward feeding in multiple effect evaporation Concentrate heat sensitive materials Achieve very high concentration of the final product Get economical temperature difference by using moderate pressure steam Facilitate forward feeding in multiple effect evaporation ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat waves Can be reflected by a mirror Can not pass through vacuum Travel in straight line Both B and C Can be reflected by a mirror Can not pass through vacuum Travel in straight line Both B and C ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 'Fouling factor' used in the design of a multipass shell and tube heat exchanger is a Non-dimensional factor None of these Factor of safety Conversion factor for individual film heat transfer co-efficient to overall heat transfer co-efficient Non-dimensional factor None of these Factor of safety Conversion factor for individual film heat transfer co-efficient to overall heat transfer co-efficient ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The Graetz number is concerned with the absorption with chemical reaction heat transfer in turbulent flow heat transfer in laminar flow mass transfer between a gas and a liquid absorption with chemical reaction heat transfer in turbulent flow heat transfer in laminar flow mass transfer between a gas and a liquid ANSWER DOWNLOAD EXAMIANS APP
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