Heat Transfer Nusselt number is the ratio of the Heat flux at the wall to that across the entire pipe Temperature gradient of the wall to that across the entire pipe Temperature difference to the temperature gradient at the wall None of these Heat flux at the wall to that across the entire pipe Temperature gradient of the wall to that across the entire pipe Temperature difference to the temperature gradient at the wall None of these 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 When vaporisation takes place through a blanketting film of gas, the phenomenon is termed as __________ boiling. film none of the listed here transition pool film none of the listed here transition pool ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following has the lowest overall heat transfer co-efficient? Molten sodium Dowtherm Air Water Molten sodium Dowtherm Air Water ANSWER DOWNLOAD EXAMIANS APP
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 1/εx + 1/εy (εx + εy)/(εx + εy - εx . εy) Εx . εy Εx + εy 1/εx + 1/εy (εx + εy)/(εx + εy - εx . εy) Εx . εy ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Dietus-Boelter equation used for the determination of heat transfer co-efficient is valid for fluids in laminar flow for fluids in tubulent flow none of the listed here when Grashhoff number is very important for fluids in laminar flow for fluids in tubulent flow none of the listed here when Grashhoff number is very important ANSWER DOWNLOAD EXAMIANS APP
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