Engineering Questions with Answers - Multiple Choice Questions
Distillation Design MCQ’s – Stratergy of Solution using Rigorous Methods
1 - Question
The Wang Henke equation is used, for the calculation of
a) Flow rates
b) Volatility
c) Stages
d) Reflux
View Answer
Answer: a
Explanation: The Wang Henke equation is used for the calculation of component and flow rates, Fenske’s for relative volatility and material balance for flow rates.
2 - Question
Wide boiling and energy coupled systems are drastically
a) Exponential
b) Linear
c) Logarithmic
d) Semi logical
View Answer
Answer: b
Explanation: Wide boiling and energy coupled systems are drastically Linear, while d/b plots are nonlinear and equilibrium plots are also nonlinear.
3 - Question
Difference between k and k+1 should be very
a) Small
b) Large
c) Zero
d) Unity
View Answer
Answer: a
Explanation: Difference between k and k+1 should be very small, if the difference increases this could cause problems like stage failure and flooding.
4 - Question
Rigorous method are based on?
a) Heat duties
b) Product compositions
c) Feed tares
d) Stages
View Answer
Answer: a
Explanation: Rigorous method are based on Heat duties and other methods are based on the feed and Product compositions.
5 - Question
MESH equations are written in terms of?
a) Mass rates
b) Flow rates
c) Vapor rates
d) Liquid rate
View Answer
Answer: c
Explanation: MESH equations are written in terms of Vapor rates and material balance equations are written in mass and flow rates.
6 - Question
In matrix form, system equation is expressed as
a) rivi = -fj
b) rivi = -Kj
c) rivi = -Gj
d) rivi = -Zj
View Answer
Answer: a
Explanation: In matrix form system equation is expressed as rivi = -fj, where f is the function of the matrix and ri and vi are rows and columns.
7 - Question
The transposed vapor rate vector, Vi is raised to power of
a) Jk
b) Ik
c) T
d) P
View Answer
Answer: c
Explanation: As Vi = (di, vi1, vi2, viN) T So T is Power, here T represents the temperature on which the vapor rate is measured.
8 - Question
The transposed feed Rate vector, is proportional to
a) T
b) G
c) K
d) P
View Answer
Answer: a
Explanation: fj = (0, 0, 0……Vi…0, 0)T So T is Power of the function and the zero represents the empty states in the function.
9 - Question
The adiabatic split of vapor and liquid portion are expressed as
a) VIf and LiF
b) KIf and LiF
c) VIf and KiF
d) XIf and YiF
View Answer
Answer: c
Explanation: The adiabatic split of vapor and liquid portion are expressed as VIf and LIf, These are equally important for all compositions of vapor and liquid.
10 - Question
. The main diagonal mij is expressed as
a) –(1+Aij)
b) -(Aij)
c) 1-Aij
d) Aij
View Answer
Answer: a
Explanation: Here mij=–(1+Aij) for any stage j, while -(Aij) represent only the factor for both gas and liquid phases and negative sign indicates the decreasing slope.