Heat Transfer In an extended surface heat exchanger, fluid having lower co-efficient Should not be used as it gives very high pressure drop Flows outside the tubes Flows through the tube Can flow either inside or outside the tubes Should not be used as it gives very high pressure drop Flows outside the tubes Flows through the tube Can flow either inside or outside the tubes ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A composite wall consists of two plates A and B placed in series normal to the flow of heat. The thermal conductivities are kA and kB and the specific heat capacities are CPA and CPB for plates A and B respectively. Plate B has twice the thickness of plate A. At steady state, the temperature difference across plate A is greater than that across plate B, when KA < 0.5kB CPA > CPB KA>2 kB CPA < CPB KA < 0.5kB CPA > CPB KA>2 kB CPA < CPB ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a laboratory test run, the rate of drying was found to be 0.5 x 10-3 kg/m².s, when the moisture content reduced from 0.4 to 0.1 on dry basis. The critical moisture content of the material is 0.08 on a dry basis. A tray dryer is used to dry 100 kg (dry basis) of the same material under identical conditions. The surface area of the material is 0.04 m²/kg of dry solid. The time required (in seconds) to reduce the moisture content of the solids from 0.3 to 0.2 (dry basis) is 2000 4000 6000 5000 2000 4000 6000 5000 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Maximum heat transfer rate is achieved in __________ flow. Laminar Turbulent Co-current Counter-current Laminar Turbulent Co-current Counter-current ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Use of transverse baffles in a shell and tube heat exchanger is done to increase the All of these Rate of heat transfer Turbulence of shell side fluid Flow velocity All of these Rate of heat transfer Turbulence of shell side fluid Flow velocity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For what value of Prandtl number, the Col-burn analogy is valid ? l to 50 1 to 103 0.06 to 120 0.6 to 120 l to 50 1 to 103 0.06 to 120 0.6 to 120 ANSWER DOWNLOAD EXAMIANS APP
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