Chemical Engineering MCQs

6108 MCQs  (Page 167 of 611)

Attempt Chemical Engineering Quiz
For a binary mixture with low relative volatility___________________?
A. Use steam distillation
B. Use molecular distillation
C. Use high pressure distillation
D. An azeotrope may be formed during distillation
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The slope of 9-line is determined by the__________________?
A. Reflux ratio
B. Plate efficiency to be achieved
C. Thermal condition of the feed
D. Relative volatility
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Freundlich equation applies to the adsorption of solute from___________________?
A. Dilute solutions, over a small concentration range
B. Gaseous solutions at high pressure
C. Concentrated solutions
D. None of these
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The Hatta number is important in_________________?
A. Multi-component distillation
B. Binary distillation
C. Gas absorption without chemical reaction
D. Gas absorption with chemical reaction
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The dew point of an unsaturated gas-vapor mixture does not depend upon the _________________ of the mixture?
A. Composition
B. Temperature
C. Total pressure
D. All a, b. and c.
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The drying time between fixed moisture content within diffusion controlled ‘falling rate period’ is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid) ?
A. √t
B. T
C. T2
D. T3
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A solid is being dried in the linear drying rate regime from moisture content Xo to XF. The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture Xo. The drying time for M = (Ls/ARc) is (where, L = total mass of dry solid, A = total surface area for drying Rc = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids)) ?
A. M(xo – xf)
B. M(xo/xf)
C. M ln(xo/xf)
D. Mxo ln(xo/xf)
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In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is_________________?
A. Equal to the heat of formation of surface compound
B. Equal to the heat of wetting
C. Zero
D. Called integral heat of adsorption
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The critical moisture content in case of drying indicates the ________________ rate period?
A. Beginning of falling
B. Beginning of constant
C. End of falling
D. None of these
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Separation of two volatile liquids by distillation makes use of their___________________?
A. Selectivity
B. Relative volatility
C. Solubility
D. Density difference
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Word of the Day
26 Jul
Simultaneously
at the same time.
ایک ہی وقت میں، ایک ساتھ، بیک وقت

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