Engineering Questions with Answers - Multiple Choice Questions
Distillation Design MCQ’s – Process Design and Optimization
1 - Question
Tray efficiency correspondingly depends upon?
a) Column Diameter
b) Column throughput
c) Column length
d) Column feed
View Answer
Answer: b
Explanation: Tray efficiency depends upon column throughput and velocity depends upon the Column Diameter.
2 - Question
When a minor fraction of liquid flows to the tray below through the tray perforations it is called
a) Weeping
b) Dumping
c) Entrainment
d) Feeding
View Answer
Answer: a
Explanation: During weeping, a minor fraction of liquid flows to the tray below through the tray perforations.
3 - Question
When distillate contains highest possibility of light key, D/F approaches
a) Infinity
b) Zero
c) Unity
d) Double
View Answer
Answer: c
Explanation: When distillate contains highest possibility of light key D/F approaches Unity and lowest when D/F approaches Zero.
4 - Question
At higher recovery _____ distillate is produced.
a) Low
b) More
c) Finite
d) Unwanted
View Answer
Answer: b
Explanation: At higher recovery ¬¬¬¬More distillate is produced but of lower purity. At a lower recovery the relation follows an inverse character.
5 - Question
The vertical D/F line indicated the
a) Maximum impurity level
b) Minimum impurity level
c) More separation
d) Less separation
View Answer
Answer: a
Explanation: The vertical D/F line indicated the Maximum impurity level at that point on the curve, and this should has to be minimized for better operations.
6 - Question
The material balance optimization is also referred as
a) L V optimization
b) B D optimization
c) D B optimization
d) V L optimization
View Answer
Answer: c
Explanation: D B is optimization at a fixed recovery and L V optimization is done for the matching of feed rates.
7 - Question
Raising the column pressure, results in
a) Lower relative volatility
b) Higher relative volatility
c) No effect
d) Higher boiling point
View Answer
Answer: a
Explanation: The unfavorable effects of raising column pressure is that it lowers relative volatility and thus discarding the products formation.
8 - Question
What does DCF represents?
a) Distillation Corp Factor
b) Damping Correction Factor
c) Down Comer Flow
d) Discounted Cash flow
View Answer
Answer: d
Explanation: DCF is used for estimating payout period, while down comer flow is a physical quantity of column.
9 - Question
What does RVP Stands For?
a) Reid Vapor pressure
b) Reflux vapor pressure
c) Reid Viscous Parameter
d) Right Vary Parameter
View Answer
Answer: a
Explanation: It is a physical property representing Reid Vapor pressure, while for performing reflux operations the Reflux vapor pressure is considered.
10 - Question
Energy balance optimization is a prime factor for setting
a) Operations
b) Cost
c) Reflux
d) Feed
View Answer
Answer: b
Explanation: Unlike Material balance optimization, Energy balance optimization can be used for the setting of a distillation column.