This set of Distillation Design Multiple Choice Questions & Answers (MCQs) focuses on “Simple Distillation”.
1. The overall Material balance, is given as
a) F = D+B
b) D =F +B
c) F = D+B
d) F=B-D
View Answer
Explanation: F = B+D where F=Feed moles
D=Distillates
B= Bottoms moles.
2. The material Balance around a condenser, is given as
a) F = D+B
b) F = D+B
c) V = L+D
d) L= V + D
View Answer
Explanation: V = L+D
V= Vapor from column
L= liquid returning to column.
3. For a batch distillation process
a) –ydV = d(xW)
b) –xdV = d(xW)
c) -xW =d(yV)
d)- yW =d(xV)
View Answer
Explanation: –ydV = d(xW) where dV= vapor rate, moles/h
W=total moles in still.
4. The below equation, holds well for?
a) Flash distillation
b) Simple distillation
c) Multicomponent distillation
d) Final distillation
View Answer
Explanation: This holds for simple distillation Where Wf=moles in the still and W0=moles originally charged.
5. If the integral part is given as -1.79 and still has 100 moles originally charged. Find the WF?
a) 15.8
b) 12.9
c) 16.7
d) 18.0
View Answer
Explanation: As In WF⁄100 = -1.79
So WF = 16.7.
6. Find α. If Xd=0.517 and Xw=0.3
a) 1.3
b) 2.5
c) 5.6
d) 3.4
View Answer
Explanation: As α = Xd(1-Xw)/ Xw(1- Xd) using values we have 0.517(1-0.3)/0.3(1-0.517) = 2.5.
7. Calculate F? If D=4.61 and W=5.39
a) 7.8
b) 10
c) 9
d) 1.34
View Answer
Explanation: As F = D +W = 4.61+5.39 = 10.
8. Calculate the enthalpy HF? If Cp= 0.825, W=32 and Tref=15C, at room temperature
a) 119 kcal/kmol
b) 78 kcal/kmol
c) 700 kcal/kmol
d) 70 kcal/kmol
View Answer
Explanation: As Hf = (0.825) (32) (25-15) =119 kcal/kmol.
9. Batch distillation is also called as?
a) Flash distillation
b) Rayleigh’s Criteria
c) Thompson Distillation
d) Crane Distillation
View Answer
Explanation: Batch distillation is also called as Rayleigh’s Criteria. As he invented it early 19th century, in this feed composition varies from time to time.
10. Flash distillation is called as?
a) Final distillation
b) Equilibrium distillation
c) Growth distillation
d) Full distillation
View Answer
Explanation: Flash distillation is called as Equilibrium distillation because the volatility is the basis of the separation and will make components differ in mixture.
Sanfoundry Global Education & Learning Series – Distillation Design.
To practice all areas of Distillation Design, here is complete set of 1000+ Multiple Choice Questions and Answers.
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