Download SGBAU (Sant Gadge Baba Amravati university) B-Tech/BE (Bachelor of Technology) 7th Sem Chemical Engineering Process Dynamics n Control Previous Question Paper
11659 : Process Dynamics and Control : 7 CH 03
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Tune : Three IIours . o 2 5 5? . Max. Marks : 80
Notes : 1 Answer three question from Section A and three question from Section B.
2 Assume suitable data wherever necessary.
3. Diagrams and chemical equations should be given wherever necessary.
4 Illustrate your answer necessary with the help of neat sketches.
5 Use of pen Bluc/Black ink/re?ll only for writing the answer book.
SECTION - A
l a) Discuss the characteristics of ?rst order system for step forcing function in the input variable 7
b)
2.
3.
4.
5 a)
of the system.
What do you mean by non-interacting multi capacity control system? Draw the response for 7
a step input for samc.
OR
The overall transfer function of the control system is given as - l4
G(s) = _2]6?
1 .53 + 2.45 + 6
A step change of magnitude 6 is introduced into the system calculate.
i) Overshoot
ii) Period of oscillation
iii) Natural period of oscillation
iv) Rise timc
v) Ultimate value of response
vi) _Maximum value of response
The open loop transfer function of a control system is given as 13
K 0.5 1
6(5) = _c(__:+_)_
s(s+1)(s +0.5)
sketches the root locus diagram of the control system. Indicate open loop poles, zero.
breakaway point asymptotic lines the direction in which the loci travel. Determine the value
ofgain of the controller Kc. for which the system becomes just unstable.
OR
The open loop transfer function of a control system is given as - 13
Kc
G s = ??
() 5(0.ls 4-1)(105+1)
Sketch the asymptotic Bode diagram of control system. Determine the value of Kc for which
the control system is stable.
Describe the mechanism of proportional integral controller and derive the equation of 7
transfer function for thc same.
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b) Derive the response equation and offset equation for the proportional Derivative controller
for servo-mechanism control problem
0R
6. a) The unity feed back control system is gix en 21 atcp chungc ul?magnitude one to the set point.
Determine the offset and the m zuimum \ ulue ot?the response of the over all transfer function
is -
C(s) -, 0.7
MS) 32 +0.65 +1
b) Discuss the working and industrial applications of the pneumatic control value with
diagram.
SECTION ? B
7. a) What is servo & Regulator control problems?? Discuss the servo-mechanism control
problem for negative feed back system.
b) Explain feed forward control of drtun boiler in chemical Industry.
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8. :1) Obtain the transfer C(s)/R1 s?) for the biock diagram shown.
L?
+ + I C
0, ?~&)?? ? -?? ~
ygs +1
1
)?2.\ + l
b) Discuss Ziegler - Nichols optimum contrullcr settings.
c) Explain Nyquisl stability criteria.
9. 3) Discuss the cascade control with characteristic equation with help ofblock diagram.
b) Explain cascade control used in heat exchanger to maintain the outlet temperature of
stream?
OR
10. :1) Discuss Ratio control and mcntion the examples ofratio control in chemical industries.
b) Explain with diagram feed forward control ut?distillation column.
1]. Discuss the following control strategies in
OR
12. Discuss the following control of reactors.
i) Control ofa CSTR. ii) Cuntrol of?l?ubular reactor.
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This post was last modified on 10 February 2020