Distillation Design Mcqs

Q:

The locus of points in the composition space where the temperature for a given mixture at vapor-liquid equilibrium is constant, is called?

A) Isotherm B) Paratherm
C) Dual nature D) Final-therm
 
Answer & Explanation Answer: A) Isotherm

Explanation: Liquid isotherms are lines of constant value of the boiling temperature and vapor isotherms are lines of constant value of the condensation temperature.

View Answer Discuss

55
Q:

The locus of compositions that cannot be crossed by the given distillation process, is called?

A) Distillation line B) Distillation Boundary
C) Distillation Map D) Distillation region
 
Answer & Explanation Answer: B) Distillation Boundary

Explanation: The locus of compositions that cannot be crossed by the given distillation process, the existence and location of such boundaries depend critically on the type of distillation in question.

View Answer Discuss

48
Q:

Bottom flowrate (B) is used to control the level in?

A) Rampage B) Reflux
C) Reboiler D) Condenser drum
 
Answer & Explanation Answer: C) Reboiler

Explanation: Bottom flowrate (B) is used to control the level in reboiler, for the extractive middle vessel batch distillation column.

View Answer Discuss

46
Q:

Distillate flowrate (D) is used to control the level in?

A) Rampage B) Reflux
C) Reboiler D) Condenser drum
 
Answer & Explanation Answer: D) Condenser drum

Explanation: Distillate flowrate (D) is used to control the level in condenser drum, for the extractive middle vessel batch distillation column.

View Answer Discuss

48
Q:

Liquid flow out of middle vessel (LM) is used to control?

A) 2/E B) 7/E
C) 8/E D) 1/E
 
Answer & Explanation Answer: A) 2/E

Explanation: Liquid flow out of middle vessel (LM) is used to control the 2/E split in the stripping section, for the extractive middle vessel batch distillation column.

View Answer Discuss

50
Q:

Entrainer feed flowrate (E), is used to control?

A) 5/6 split B) 7/8 split
C) ½ split D) ¾ split
 
Answer & Explanation Answer: C) ½ split

Explanation: Entrainer feed flowrate (E) is used to control the 1/2 split in the extractive section for the extractive middle vessel batch distillation column.

View Answer Discuss

40
Q:

Liquid reflux (L1), is used to control?

A) 1/E split B) 1/2E split
C) 1/5E split D) E split
 
Answer & Explanation Answer: A) 1/E split

Explanation: Liquid reflux (L1) is used to control the 1/E split in the rectifying section for the extractive middle vessel batch distillation column.

View Answer Discuss

41
Q:

High reflux “weakens”, the effect of the?

A) Stages B) Trays
C) Entrainer D) Plates
 
Answer & Explanation Answer: C) Entrainer

Explanation: High reflux “weakens” the effect of the entrainer (E), there is a minimum and a maximum reflux ratio in order to achieve acceptable separation between component 1 and E.

View Answer Discuss

43