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# Separation Processes MCQ’s – Newton-Raphson Method

1 - Question

The Newton-Raphson method of finding roots of nonlinear equations falls under the category of which method?

a) Bracketing

b) Random

c) Open

d) Graphical

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Answer: cExplanation: It is an open method since we have to guess the square root.

2 - Question

What is the formula of finding the square root of R from equation x2- R=0?

a) Xi+1= 0.5(xi + R/xi)

b) Xi+1= 0.5(xi + R/2)

c) Xi= 0.5(xi + R/xi)

d) Xi+1= 0.5(xi + xi)

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Answer: aExplanation: The formula of finding the square root of R from equation x2– R=0 is Xi+1= 0.5(xi + R/xi).

3 - Question

If broth flow rate is 200kg/hr and solvent flow rate is 300kg/hr and POD is of diameter 1m and length 10m, what is the residence time?

a) 28s

b) 56s

c) 35s

d) 39s

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Answer: aExplanation: ttme= pi*(D2/4)L/F+S, ttime = 3.14*(1/4)10/500=56s.

4 - Question

If broth flow rate is 600kg/hr and solvent flow rate is 400kg/hr and POD is of diameter 1m and length 5m, what is the residence time?

a) 28s

b) 14s

c) 30s

d) 35s

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Answer: bExplanation: ttme= pi*(D2/4)L/F+S, ttime = 3.14*(1/4)5/1000=14s.

5 - Question

If broth flow rate is 200kg/hr and solvent flow rate is 300kg/hr and POD is of diameter 1m and length 15m, what is the residence time?

a) 72s

b) 76s

c) 82s

d) 85s

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View Answer**

Answer: aExplanation: ttme= pi*(D2/4)L/F+S, ttime = 3.14*(1/4)15/500=85s.

6 - Question

If broth flow rate is 200kg/hr and solvent flow rate is 300kg/hr and POD is of diameter 2m and length 5m, what is the residence time?

a) 98s

b) 111ss

c) 113s

d) 119s

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Answer: aExplanation: ttme= pi*(D2/4)L/F+S, ttime = 3.14*(4/4)5/500=113s.

7 - Question

If broth flow rate is 200kg/hr and solvent flow rate is 300kg/hr and POD is of diameter 1m and length 6m, what is the residence time?

a) 28s

b) 20s

c) 30s

d) 34s

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Answer: dExplanation: ttme= pi*(D2/4)L/F+S, ttime = 3.14*(1/4)6/500=34s.

8 - Question

If broth flow rate is 200kg/hr and solvent flow rate is 300kg/hr and POD is of diameter 1m and length 7m, what is the residence time?

a) 28s

b) 20s

c) 40s

d) 35s

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Answer: cExplanation: ttme= pi*(D2/4)L/F+S, ttime = 3.14*(1/4)7/500=40s.

9 - Question

If broth flow rate is 200kg/hr and solvent flow rate is 300kg/hr and POD is of diameter 3m and length 5m, what is the residence time?

a) 200s

b) 250s

c) 230s

d) 254s

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Answer: aExplanation: ttme= pi*(D2/4)L/F+S, ttime = 3.14*(9/4)5/500=254s.

10 - Question

If broth flow rate is 200kg/hr and solvent flow rate is 500kg/hr and POD is of diameter 1m and length 5m, what is the residence time?

a) 28s

b) 20s

c) 30s

d) 35s

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View Answer**

Answer: bExplanation: ttme= pi*(D2/4)L/F+S, ttime = 3.14*(1/4)5/700=20s.