Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 5th Sem New 2151705 Process Control Systems Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? V (New) EXAMINATION ? WINTER 2019
Subject Code: 2151705 Date: 04/12/2019
Subject Name: Process Control Systems
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) What are the performance criterions to design a control system? 03
(b) Explain in brief the interacting and non-interacting processes
with example.
04
(c) Give out the guidelines for digital implementation of a PID
controller in detail.
07
Q.2 (a) Draw and explain the step response of a PI controller. 03
(b) What causes inverse response? Explain with mathematical
arguments.
04
(c) What is discrete time control? Explain ZOH and sampling
concept for discrete time control.
07
OR
(c) Explain two position controller with suitable waveform. Show
the effect of neutral zone on controller output.
07
Q.3 (a) What is self-regulation? Explain with an example. 03
(b) Explain the terms: 1) Dead Time
2) Offset Error.
04
(c) For a unity feedback system, process transfer function is given
by G(s)=1/s(s+1)(s+5). The controller is of PID mode. Calculate
the optimal values of controller parameter based on ultimate
cycle method of tuning.
07
OR
Q.3 (a) What do you mean by velocity and position algorithm for PID
controller implementation?
03
(b) Explain Time Proportional Control with suitable waveform. 04
(c) A certain thermometer has a time constant of 15 s and initial
temperature of T0= 25?C. It is suddenly exposed to a
temperature of 100?C. Determine the rise time i.e. time required
to attain 95% of steady state value and the temperature at this
time.
07
Q.4 (a) Explain open loop ZN tuning method of the PID controller 03
(b) What is offset in case of proportional control action? How offset
can be eliminated?
04
(c) What is adaptive control? Explain gain scheduling in the context
of adaptive control with suitable diagram.
07
OR
Q.4 (a) Explain ratio control with suitable example. 03
(b) What are the limitations of cascade control strategy? Discuss on
tuning rule for the same.
04
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? V (New) EXAMINATION ? WINTER 2019
Subject Code: 2151705 Date: 04/12/2019
Subject Name: Process Control Systems
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) What are the performance criterions to design a control system? 03
(b) Explain in brief the interacting and non-interacting processes
with example.
04
(c) Give out the guidelines for digital implementation of a PID
controller in detail.
07
Q.2 (a) Draw and explain the step response of a PI controller. 03
(b) What causes inverse response? Explain with mathematical
arguments.
04
(c) What is discrete time control? Explain ZOH and sampling
concept for discrete time control.
07
OR
(c) Explain two position controller with suitable waveform. Show
the effect of neutral zone on controller output.
07
Q.3 (a) What is self-regulation? Explain with an example. 03
(b) Explain the terms: 1) Dead Time
2) Offset Error.
04
(c) For a unity feedback system, process transfer function is given
by G(s)=1/s(s+1)(s+5). The controller is of PID mode. Calculate
the optimal values of controller parameter based on ultimate
cycle method of tuning.
07
OR
Q.3 (a) What do you mean by velocity and position algorithm for PID
controller implementation?
03
(b) Explain Time Proportional Control with suitable waveform. 04
(c) A certain thermometer has a time constant of 15 s and initial
temperature of T0= 25?C. It is suddenly exposed to a
temperature of 100?C. Determine the rise time i.e. time required
to attain 95% of steady state value and the temperature at this
time.
07
Q.4 (a) Explain open loop ZN tuning method of the PID controller 03
(b) What is offset in case of proportional control action? How offset
can be eliminated?
04
(c) What is adaptive control? Explain gain scheduling in the context
of adaptive control with suitable diagram.
07
OR
Q.4 (a) Explain ratio control with suitable example. 03
(b) What are the limitations of cascade control strategy? Discuss on
tuning rule for the same.
04
2
(c) Design dynamic model for continuous stirred tank heater
(CSTH).
07
Q.5 (a) Explain the split range control for reactor pressure control. 03
(b) What is integrator windup? State and explain the ways to deal
with the same.
04
(c) Explain selective control scheme with suitable diagram. 07
OR
Q.5 (a) How to derive the parameters of FOPDT model from Process
Reaction Curve.
03
(b) Explain Multi-position controller function with error Vs.
controller output relation.
04
(c) Explain shrinking and swelling concept in the context of drum
boiler control.
07
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This post was last modified on 20 February 2020