Chemical Engineering MCQs

6108 MCQs  (Page 195 of 611)

In McCabe-Thiele method, at infinite reflux ratio________________?
A. The overhead product is minimum
B. Both the operating lines coincide with diagonal
C. Both a. and b.
D. Neither a. nor b.
Pick out the system with minimum boiling azeotrope at 1 atm ?
A. Benzene-toluene
B. Ethyl alcohol-water
C. Hydrochloric acid-water
D. All a., b. and c.
Raoult’s law is applicable to the_____________________?
A. Ideal solutions
B. Real solutions
C. Mixture of water and alcohol
D. Non-ideal gases
Flooding in a column results due to___________________?
A. High pressure drop
B. Low pressure drop
C. Low velocity of the liquid
D. High temperature
When the liquid phase and vapour phase of a binary system obeys Raoult’s and Dalton’s law respectively, the relative volatility is the ratio of________________________?
A. Vapour pressure of component a to that of component b
B. Vapour pressure of component a to the total pressure
C. Vapour pressure of component a to the partial pressure of a
D. Partial pressure of component a to the total pressure
Extraction of coffee from its seed is done by___________________?
A. Liquid-liquid extraction
B. Leaching
C. Extractive distillation
D. Steam distillation
Channelling is most severe_____________________?
A. In towers packed with stacked packing
B. In towers packed randomly with crushed solids
C. In dumped packing of regular units
D. At very high liquid flow rate