Distillation Design Questions and Answers – 2N Newton Method

This set of Distillation Design Multiple Choice Questions & Answers (MCQs) focuses on “2N Newton Method”.

1. The 2N Newton method is based on algorithm of?
a) N X N
b) 2 X N
c) N X M
d) 2 X M
View Answer

Answer: b
Explanation: The 2N Newton method is based on algorithm of 2 X N, while N X N is called as the Jacobin matrix.

2. XIJ and Yij are the component balances of
a) Equilibrium relation
b) Constant relation
c) Final relation
d) Direct relation
View Answer

Answer: a
Explanation: XIJ and Yij are the component balances of Equilibrium relation, Whereas X=Y represents the final relation of the system.

3. Which method uses the summation of the equations for vapor and liquid components?
a) NR Method
b) RF Method
c) Tomich Method
d) 2N Method
View Answer

Answer: d
Explanation: Tomich Method uses the summation of the equations for vapor and liquid components, while RF and NR are based on the initial conditions of column.
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4. The independent variables of independent functions are used as, Fi =
a) [E1 E2 E3 …. EN-1 EN, K1 K2 K3 …. KN-1 KN].
b) [T1 T2 T3 …. TN-1 TN, K1 K2 K3 …. KN-1 KN].
c) [S1 S2 S3 …. SN-1 SN, E1 E2 E3 …. EN-1 EN].
d) [K1 K2 K3 …. KN-1 KN, T1 T2 T3 …. TN-1 TN].
View Answer

Answer: c
Explanation: As Fi= [S1 S2 S3 …. SN-1 SN, E1 E2 E3 …. EN-1 EN] T , where S is the same factor as used in Fenske’s equation and E are the respective energy of the systems.

5. The stages flow rate and the vapor flow rates are expressed, as
a) [E1 E2 E3 …. EN-1 EN, V1 V2 K3 …. VN-1 VN].
b) [T1 T2 T3 …. TN-1 TN, V1 V2 V3 …. VN-1 VN].
c) [S1 S2 S3 …. SN-1 SN, E1 E2 E3 …. EN-1 EN].
d) [K1 K2 K3 …. KN-1 KN, T1 T2 T3 …. TN-1 TN].
View Answer

Answer: b
Explanation: As Xi= [T1 T2 T3 …. TN-1 TN, V1 V2 V3 …. VN-1 VN] T, where T is defined as respective temperature and the volume V corresponding to the same relation.
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6. The initial assumption to Tomich method is
a) Set initial Temperature
b) Set total stages
c) Final Pressure
d) Initial Pressure
View Answer

Answer: a
Explanation: The initial assumption to Tomich method is to set initial Temperature for each stage, for any other method feed rates and total mole balance are assumed.

7. The θj factor is a
a) Subtracted
b) Additive
c) Multiplier
d) Divider
View Answer

Answer: c
Explanation: As |L/V| = θj*|Lj/Vj|CR and θj factor is a Multiplier, this is based on a correlation that acts as a correction factor of the calculation.
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8. Newton’s method is a fixed point iteration method, As Pn
a) g(Pn-1)
b) (Pn-1)
c) g
d) Pn
View Answer

Answer: a
Explanation: Always Pn = g (Pn-1) is fixed point as in newton method, while other method NR and RS stage iterations are made as the problem proceeds.

9. Newton’s method cannot continue, if for some Pn-1
a) f’(Pn+1)
b) f’(P)
c) f’(Pn-1)
d) P
View Answer

Answer: c
Explanation: Newton’s method cannot continue if for some f’ (Pn-1), as the derivative at some point becomes zero then this is called as failure in the newton’s method.
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10. Given ε>0. Then
a) f(a)f(b)>0
b) f(a)f(b)=0
c) f(a)f(b)=1
d) f(a)f(b)<0
View Answer

Answer: d
Explanation: Choose a and b so that f (a) f(b)< 0, if a and b are not given they are assumed to be as the average value of f(0) for two consecutive negative and positive outcomes.

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.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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