Chemical Engineering MCQs

6108 MCQs (Page 208 of 611)

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Stacked packing compared to dumped packing_________________?

A. Provides poorer contact between the fluids
B. Gives lower pressure drop
C. Both a. and b.
D. Gives higher pressure drop

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_______________ developed the film theory ?

A. Higbie
B. Fick
C. Ergun
D. Levenspiel

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Schmidt number is given by ___________________?

A. Μ/ρdab
B. Re × pe
C. Sh × pe
D. Re/pe

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Fenske equation determines the __________________?

A. Maximum number of ideal plates
B. Height of the distillation column
C. Minimum number of theoretical plates
D. Optimum reflux ratio

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Hydrogenation of oil is carried out in a/an _______________ in Vanaspati manufacturing plant?

A. Agitated vessel
B. Sieve tray column
C. Bubble cap column
D. Packed tower

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If xD = overhead product molal composition and RD = reflux ratio, then slope and intercept of the operating line for rectifying section are respectively ?

A. [xd/(rd + 1)], [rd/(rd + 1)]
B. [rd/(rd + 1)], [xd/(xd + 1)]
C. [xd/(rd + 1)], [(rd + 1)/rd]
D. None of these

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Which of the following equipments is not used for gas dispersion ?

A. Agitated vessels
B. Bubble cap tray towers
C. Perforated sieve tray towers
D. Spray towers

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______________ column is the most suitable for achieving the best performance for mass transfer operations involving liquid with dispersed solids ?

A. Wetted wall
B. Packed
C. Plate
D. Spray

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On addition of solute in the solvent, the ______________ of the solution decreases ?

A. Boiling point
B. Freezing point
C. Vapour pressure
D. Both b. and c.

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When adsorption hysteresis is observed, the desorption equilibrium pressure is _________________ that obtained by adsorption?

A. Always lower than
B. Always higher than
C. Same as
D. Dependent on the system; can be either lower or higher than

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