Chemical Engineering MCQs

A. The product composition but not the fraction vaporised
B. The product composition as well as the fraction vaporised
C. The fraction vaporised but not the product composition
D. Neither the product composition nor the fraction vaporised

A. Mole fractions
B. Mole ratios
C. Partial pressure
D. Mass fractions

A. Stanton number
B. Peclet number
C. Thermal diffusivity
D. Momentum diffusivity

A. Greater than that computed for ideality
B. Less than that computed for ideality
C. Less than the sum of the vapour pressure of the components
D. None of these

A. Have low weight per unit volume
B. Have large surface area per unit volume
C. Have large free cross-section
D. Hold up large amount of liquid in the packing

A. Evaporation
B. Blowdown
C. Entrainment
D. All a., b. & c.

A. Slope of the operating line in stripping section decreases
B. Number of plates decreases very slowly first and then more and more rapidly
C. Total cost first decreases and then increases
D. Liquid flow increases while the vapor flow decreases for a system

A. Is of low volatility
B. Forms a low boiling azeotrope
C. Forms a high boiling azeotrope
D. Does not alter the relative volatility of the original components

A. Constant molal overflow
B. Total reflux
C. Constant relative volatility
D. All a., b. and c.

A. Zero
B. Unity
C. Infinity
D. None of these