Heat Transfer For flow over a flat plate, the ratio of thermal boundary layer thickness, 'xt' and hydrodynamic boundary layer thickness 'x' is equal to (where, NPr = Prandtl number) NPr NPr-1 NPr1/3 NPr-1/3 NPr NPr-1 NPr1/3 NPr-1/3 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 'Duhring's plot' is of use in Absorption Extractive distillation Evaporation Leaching Absorption Extractive distillation Evaporation Leaching ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Economy of a multiple effect evaporator depends upon the Heat balance consideration Neither A nor B Both A and B Rate of heat transfer Heat balance consideration Neither A nor B Both A and B Rate of heat transfer ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The outlet temperature of cooling water in a heat exchanger is generally not allowed to exceed above 50°C in industrial practice mainly to avoid Decrease in heat exchanger efficiency Its evaporation loss Uneconomic LMTD Excessive corrosion Decrease in heat exchanger efficiency Its evaporation loss Uneconomic LMTD Excessive corrosion ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer What is the geometric mean of two heat transfer areas A₁ and A₂ ? √(A₁ . A₂) 1/2 √(A₁ . A₂) 2 √(A₁ . A₂) √(A₁ + A₂) √(A₁ . A₂) 1/2 √(A₁ . A₂) 2 √(A₁ . A₂) √(A₁ + A₂) ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a co-current double pipe heat exchanger used for condensing saturated steam over the inner tube, if the entrance and exit conditions of the coolant are interchanged, then the rate of condensation will Decrease Remain unchanged Either increase or decrease; depends on the coolant flow rate Increase Decrease Remain unchanged Either increase or decrease; depends on the coolant flow rate Increase ANSWER DOWNLOAD EXAMIANS APP
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