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-1/3 NPr NPr1/3 NPr-1 NPr-1/3 NPr NPr1/3 NPr-1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The sum of reflectivity and absorptivity for an opaque body is equal to 2 0.5 1 2 0.5 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat exchanger tubes are never made of Plain carbon steel Stainless steel Copper Lead Plain carbon steel Stainless steel Copper Lead ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A process stream of dilute aqueous solution flowing at the rate of10 Kg.s⁻¹ is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s⁻¹. A 1 - 1 shell and tube heat exchanger is available. The best arrangement is Counter flow with process stream on shell side Parallel flow with process stream on tube side Counter flow with process stream on tube side Parallel flow with process stream on shell side Counter flow with process stream on shell side Parallel flow with process stream on tube side Counter flow with process stream on tube side Parallel flow with process stream on shell side ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In case of a multipass shell and tube heat exchanger, providing a baffle on the shell side __________ the heat transfer rate. Decreases Does not affect May increase or decrease, depends on the type of baffle Increases Decreases Does not affect May increase or decrease, depends on the type of baffle Increases 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 Concentrate heat sensitive materials Get economical temperature difference by using moderate pressure steam Achieve very high concentration of the final product Facilitate forward feeding in multiple effect evaporation Concentrate heat sensitive materials Get economical temperature difference by using moderate pressure steam Achieve very high concentration of the final product ANSWER DOWNLOAD EXAMIANS APP
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