Heat Transfer Thickness of thermal boundary layer is more compared to that of hydrodynamic boundary layer, when the value of Prandtl number is > 5 < 1 1 > 1 > 5 < 1 1 > 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The local surface conductance for laminar film condensation on vertical surface is (where, t = film thickness) Independent of 't' ∝ 1/t ∝ t ∝ √t Independent of 't' ∝ 1/t ∝ t ∝ √t ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Multiple effect evaporation accounts for Lower operating costs Investment economy None of these Steam economy Lower operating costs Investment economy None of these Steam economy ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The energy radiated from a surface Q at absolute temperature T is related as Q ∝ T⁴ Q ∝ T³ Q ∝ T² None of these Q ∝ T⁴ Q ∝ T³ Q ∝ T² None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is generally considered as opaque surface towards radiations? Liquids Gases Both solids & liquids Solids Liquids Gases Both solids & liquids Solids ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For the same heat load and mass flow rate in the tube side of a shell and tube heat exchanger, one may use multipass on the tube side, because it Decreases the pressure drop Increases the overall heat transfer coefficient Decreases the outlet temperature of cooling medium None of these Decreases the pressure drop Increases the overall heat transfer coefficient Decreases the outlet temperature of cooling medium None of these ANSWER DOWNLOAD EXAMIANS APP
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