Heat Transfer In forced convection, the heat transfer depends on Re, Gr mainly Gr Re, Pr none of the listed here Re, Gr mainly Gr Re, Pr none of the listed here ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer At constant temperature, the thermal conductivities of gases __________ with rise in pressure. Remain unchanged Increase Decrease May increase or decrease; depends on the pressure Remain unchanged Increase Decrease May increase or decrease; depends on the pressure ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Boiling point elevation of a solution of NaOH Increases rapidly with temperature rise Is almost independent of temperature Both B and C Is almost independent of pressure Increases rapidly with temperature rise Is almost independent of temperature Both B and C Is almost independent of pressure ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a shell and tube heat exchanger, putting a longitudinal baffle across the shell, forces the shell side fluid to pass __________ through the heat exchanger. Twice Four times Thrice Once Twice Four times Thrice Once 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' ∝ √t ∝ 1/t ∝ t Independent of 't' ∝ √t ∝ 1/t ∝ t ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A steel sphere of radius 0.1 m at 400°K is immersed in an oil at 300°K. If the centre of the sphere reaches 350°K in 20 minutes, how long will it take for a 0.05 m radius steel sphere to reach the same temperature (at the centre) under identical conditions ? Assume that the conductive heat transfer co-efficient is infinitely large. 20 minutes 10 minutes 5 minutes 40 minutes 20 minutes 10 minutes 5 minutes 40 minutes ANSWER DOWNLOAD EXAMIANS APP
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