Download GTU BE/B.Tech 2019 Summer 6th Sem Old 161702 Process Control Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 6th Sem Old 161702 Process Control Previous Question Paper

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(OLD) ? EXAMINATION ? SUMMER 2019
Subject Code:161702 Date:21/05/2019
Subject Name: Process Control
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.

Q.1 (a) Explain modeling steps and linearization concepts for mathematical modeling of
process dynamics.
07
(b) Explain closed loop ZN tuning method of the PID controller. 07

Q.2 (a) Explain the need of PI control action in place of P control action alone. 07
(b) Explain PD control scheme in detail. 07
OR
(b) Derive model of a level tank system. 07

Q.3 (a) Explain the Ratio control in details, with suitable example and calculation. 07
(b) Write short note on selective and override control with relevant sketches. 07
OR
Q.3 (a) Explain feed forward control of heat exchanger. 07
(b) Explain split range control scheme. 07

Q.4 (a) Explain cascade control scheme with neat application diagram. 07
(b) Draw block diagram for thermometer bulb control system. Obtain its closed loop
response by applying step input.
07
OR
Q.4 (a) Define the proportional band in proportional controller? Explain how the offset
is reduced by increasing the proportional gain.
07
(b) How will you evaluate self regulation and process load in the process? Explain
it.
07

Q.5 (a) How can we determine tuning constants that give good control performance? 07
(b) Draw and explain process and instrumentation elements of a typical feedback loop. 07
OR

Q.5 (a) Obtain control model for Room Air conditioning system defining all system
variables. Is the system is Self regulating?
07
(b) An electronic flow sensor converts flow information in linearly so that the flow
from 0 to 300 m
3
/h becomes a current from 0 to 50 mA. Calculate the current for
a flow of 225 m3/h.
07

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