Heat Transfer At what value of Prandtl number, conduction is negligible in the turbulent core of a fluid flowing through a heated pipe? > 0.6 0.5 < 0.5 < 0.1 > 0.6 0.5 < 0.5 < 0.1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Fouling factor for a heat exchanger is given by (where, U₁ = heat transfer co-efficient of dirty surface U₂ = heat transfer co-efficient of clean surface) 1/U₂ - 1/U₁ U₁ - U₂ 1/U₁ - 1/U₂ U₂ - U₁ 1/U₂ - 1/U₁ U₁ - U₂ 1/U₁ - 1/U₂ U₂ - U₁ ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer With increase in porosity, the thermal conductivity of a solid substance Increases May increase or decrease; depends on the solid Remains unchanged Decreases Increases May increase or decrease; depends on the solid Remains unchanged Decreases 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 Parallel flow with process stream on shell side Counter flow with process stream on tube side Counter flow with process stream on shell side Parallel flow with process stream on tube side Parallel flow with process stream on shell side Counter flow with process stream on tube side Counter flow with process stream on shell side Parallel flow with process stream on tube side ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m².K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is 287 W/m².K 333W/m².K 1200W/m².K 894W/m².K 287 W/m².K 333W/m².K 1200W/m².K 894W/m².K ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is the most widely used heat insulating material for pipelines carrying steam? 85% magnesia cement and glass wool Tar dolomite bricks followed by asbestos Cotton followed by aluminium foil Fireclay refractory followed by aluminium sheet 85% magnesia cement and glass wool Tar dolomite bricks followed by asbestos Cotton followed by aluminium foil Fireclay refractory followed by aluminium sheet ANSWER DOWNLOAD EXAMIANS APP
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