Chemical Engineering MCQs

6108 MCQs  (Page 206 of 611)

Attempt Chemical Engineering Quiz
Stefan’s law describes the mass transfer by________________?
A. Diffusion
B. Bulk flow
C. Both a. & b.
D. Neither a. nor b.
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Flights in a rotary dryer are provided to________________?
A. Lift and shower the solids thus exposing it thoroughly to the drying action of the gas
B. Reduce the residence time of solid
C. Increase the residence time of the solid
D. None of these
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The adiabatic saturation curve for a vapour-gas mixture is__________________?
A. Straight line
B. Slightly concave upward
C. Slightly concave downward
D. None of these
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The temperature to which a vapour gas mixture must be cooled (at varying humidity) to become saturated is called the ______________ temperature?
A. Dew point
B. Wet bulb
C. Dry bulb
D. None of these
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At what value of reflux ratio, number of theoretical plates in a distillation column is minimum ?
A. 0
B. 1
C. ∞
D. < 1
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With increase in solvent rate, the number of transfer units, NtoG, for a fixed degree of absorption from a fixed amount of gas________________?
A. Increases
B. Decreases
C. Decreases linearly
D. Remain unaffected
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For turbulent mass transfer in pipes, the Sherwood number depends on the Reynolds number as___________________?
A. Re0.33
B. Re0.53
C. Re0.83
D. Re
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The vapour pressure exerted by the moisture contained in a wet solid depends upon the____________________?
A. Nature of the mositure
B. Temperature
C. Nature of the solid
D. All a., b. and c.
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Equilibrium-moisture curves of different solids ____________________ ?
A. Are different
B. Are same
C. Depend on the humidity of the gas
D. None of these
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In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at ________________ reflux ?
A. Total
B. Minimum
C. Operating
D. Maximum permissible
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Word of the Day
27 Jul
Widen
make or become wider.
چوڑا ہونا، کشادہ کرنے کا عمل

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