Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 8th Sem 2183607 Process Instrumentation, Dynamics And Control Previous Question Paper
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VIII (NEW) EXAMINATION ? WINTER 2020
Subject Code:2183607 Date:25/01/2021
Subject Name:Process Instrumentation, Dynamics & Control
Time:02:00 PM TO 04:00 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Mention the importance of Laplace transform in process dynamics.
03
(b) Draw the block diagram of a control system mentioning various components
04
present in it.
(c) Solve 3
2
+ 2
-
- 2 = 4 + 22; (0) = 1, (0) = 0, (0) = -1
07
3
2
Q.2 (a) Find the final value of a function having laplace transform
1
03
(+1)2
(b) State and prove Initial value theorem
04
(c) Stating the assumptions derive the transfer function of mercury in glass
07
thermometer.
Q.3 (a) Mention the characteristic features for response of a first order system for a step
03
input
(b) A tank having a cross sectional area of 2m2 is operating in a steady state with an
04
inlet flowrate of 2 m3/min. The resistance of valve attached to tank outlet is 0.5
min/m2. Find the transfer function relating to H(s)/Q(s)
(c) Derive the transfer function for the case of two tanks connected in series in a non-
07
interacting manner.
Q.4 (a) What is Transportation lag? Specify its importance in reference to control systems.
03
(b) Mention any four terms used to characterize an underdamped second order system.
04
(c) Derive the transfer function in a U tube manometer relating the applied pressure
07
difference and manometer reading.
Q.5 (a) State Nyquist Stability criterion.
03
(b) Describe the stability of linear systems.
04
(c) Show that for the case of a proportional controller for a change in set point offset
07
decreases when the value of gain increases
Q.6 (a) Derive the transfer function of a Proportional Integral Controller.
03
(b) Differentiate Positive feedback and Negative feedback systems. Which feedback
04
system is most commonly used in process Industries
(c) Discuss various rules for plotting root locus of a closed loop feedback system.
07
Q.7 (a) Mention various laws of thermoelectricity.
03
(b) How McLeod Vacuum Gauge is used to measure Vacuum pressure?
04
(c) Describe various Static & Dynamic Characteristics of measuring
07
instruments.
1
Q.8 (a) Write a short note on various pressure measurement systems mentioning the
03
relationship between them.
(b) How air purge system is used for level measurements?
04
(c) With the help of a neat diagram explain how Venturimeter can be used to
07
measure flow of liquids.
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This post was last modified on 04 March 2021