Mass Transfer Schimdt number and Lewis number for pure air at atmospheric conditions are respectively 1 and 0 0 and ≈ 1 < 1 and ≈ 1 >1 and ≈ 1 1 and 0 0 and ≈ 1 < 1 and ≈ 1 >1 and ≈ 1 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Unit operation involved in the prilling of urea is Both B and C Drying Evaporation Crystallisation Both B and C Drying Evaporation Crystallisation ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Which of the following is not fixed by the process requirements, in the design of absorbers? Flow rate of the entering gas Terminal concentrations of gas stream Composition of the entering liquid None of these Flow rate of the entering gas Terminal concentrations of gas stream Composition of the entering liquid None of these ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Diffusivity in concentrated solutions differs from that in dilute solutions, because of the changes in Viscosity with concentration Neither A nor B Degree of ideality of the solution Both A & B Viscosity with concentration Neither A nor B Degree of ideality of the solution Both A & B ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm. 5 2.5 to 3 1.2 to 1.5 3 to 4 5 2.5 to 3 1.2 to 1.5 3 to 4 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer To get high tray efficiency Time of contact between the two phases should be less Gas velocity should be very low Liquid entrainment should be severe Interfacial surface between liquid and gas phase should be large Time of contact between the two phases should be less Gas velocity should be very low Liquid entrainment should be severe Interfacial surface between liquid and gas phase should be large ANSWER DOWNLOAD EXAMIANS APP
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