Heat Transfer Thermal conductivity of a gas at low density, __________ with increase in temperature. Remains unchanged Decreases Increases May increase or decrease; depends on the gas Remains unchanged Decreases Increases May increase or decrease; depends on the gas ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a shell and tube heat exchanger, square pitch compared to triangular pitch Can pack more surface area into a shell of given diameter Gives a lower shell side pressure drop Gives a higher shell side pressure drop None of these Can pack more surface area into a shell of given diameter Gives a lower shell side pressure drop Gives a higher shell side pressure drop None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a parallel flow heat exchanger, if the outlet temperature of hot and cold fluids are the same, then the log mean temperature difference (LMTD) is Infinity Maximum Minimum Zero Infinity Maximum Minimum Zero ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A hot body will radiate heat most rapidly, if its surface is Black & rough Black & polished White & polished White & rough Black & rough Black & polished White & polished White & rough ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer If Prandtl number is greater than the Schmidt number, then the thermal boundary layer lies inside the concentration boundary layer thermal & concentration boundary layers are of equal thickness concentration boundary layer lies inside the thermal boundary layer none of the listed here thermal boundary layer lies inside the concentration boundary layer thermal & concentration boundary layers are of equal thickness concentration boundary layer lies inside the thermal boundary layer none of the listed here ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Maximum heat transfer rate is achieved in __________ flow. Laminar Co-current Turbulent Counter-current Laminar Co-current Turbulent Counter-current ANSWER DOWNLOAD EXAMIANS APP
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