Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 8th Sem New 2182604 Automation And Control In Rubber Industries Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VIII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2182604 Date:17/05/2019
Subject Name:Automation & control in Rubber Industries
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Draw figures wherever necessary
4. Figures to the right indicates full marks.
Q.1 (a) Define the given terms:(i) Dead Zone (ii) Drift (iii) Dynamic Error 3
(b) Explain the classification of instrument according to it?s function. 4
(c)
Discuss in detail about circular chart recorder. Which process variables of
rubber industries are recorded by it?
7
Q.2 (a) Which characteristic features would be included in rubber extruder
instrumentation?
3
(b)
List different types of sensors used to carry out the temperature
measurement in rubber extruder. Write on any two.
4
(c)
Write down the different types of sensors used to carry out the gauge
measurement in rubber calendering process. Write on any two.
7
OR
Q.2 (c) Give the principle sources of variations in calendered gauge. Discuss any
one.
7
Q.3 (a) Give examples of industrial thermocouples used in rubber industries. 3
(b) List various types of elastic pressure transducer. Write on any one. 4
(c) Discuss in detail about construction and working of strain gauge load cell. 7
OR
Q.3 (a) Draw various configurations of thermistors. 3
(b) Explain any one method to carry out pressure measurement under vacuum. 4
(c)
Discuss in detail about the construction and working of in-line stationary
torque transducer.
7
Q.4 (a) List out the terms which are used in controlled configurations. 3
(b)
Define the term ?time constant?. A mercury thermometer of first order
characteristics take 5 seconds to indicate 70% of final temperature.
Calculate time constant of thermometer.
4
(c)
Which softwares are used in data acquisition and analysis in rubber
industries? Write in brief on any two.
7
OR
Q.4 (a) Write in brief on comparator. 3
(b) A mercury thermometer of first order characteristics having time constant
of 4.5 seconds. Calculate the time needed to indicate 75% of the final
temperature.
4
(c) Discuss about the errors in data acquisition and analysis in rubber
industries.
7
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VIII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2182604 Date:17/05/2019
Subject Name:Automation & control in Rubber Industries
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Draw figures wherever necessary
4. Figures to the right indicates full marks.
Q.1 (a) Define the given terms:(i) Dead Zone (ii) Drift (iii) Dynamic Error 3
(b) Explain the classification of instrument according to it?s function. 4
(c)
Discuss in detail about circular chart recorder. Which process variables of
rubber industries are recorded by it?
7
Q.2 (a) Which characteristic features would be included in rubber extruder
instrumentation?
3
(b)
List different types of sensors used to carry out the temperature
measurement in rubber extruder. Write on any two.
4
(c)
Write down the different types of sensors used to carry out the gauge
measurement in rubber calendering process. Write on any two.
7
OR
Q.2 (c) Give the principle sources of variations in calendered gauge. Discuss any
one.
7
Q.3 (a) Give examples of industrial thermocouples used in rubber industries. 3
(b) List various types of elastic pressure transducer. Write on any one. 4
(c) Discuss in detail about construction and working of strain gauge load cell. 7
OR
Q.3 (a) Draw various configurations of thermistors. 3
(b) Explain any one method to carry out pressure measurement under vacuum. 4
(c)
Discuss in detail about the construction and working of in-line stationary
torque transducer.
7
Q.4 (a) List out the terms which are used in controlled configurations. 3
(b)
Define the term ?time constant?. A mercury thermometer of first order
characteristics take 5 seconds to indicate 70% of final temperature.
Calculate time constant of thermometer.
4
(c)
Which softwares are used in data acquisition and analysis in rubber
industries? Write in brief on any two.
7
OR
Q.4 (a) Write in brief on comparator. 3
(b) A mercury thermometer of first order characteristics having time constant
of 4.5 seconds. Calculate the time needed to indicate 75% of the final
temperature.
4
(c) Discuss about the errors in data acquisition and analysis in rubber
industries.
7
2
Q.5 (a) Give the advantages of pneumatic controller. 3
Q.5 (b) Explain the servo problem with suitable example. 4
Q.5 (c)
A unit step change in error is introduced into a PID controller. If K c=10,
?
I
=1 and ?D=0.5, plot the response of controller against time.
7
OR
(a) Write a brief note on transmission lines. 3
Q.5 (b) Explain the regulatory problem with suitable example. 4
Q.5 (c) A PID controller is at steady state with an ouput pressure of 10Psi. The set
point and pen pint are initially together. At time t=0, the set point is
removed away form the pen point at rate of 0.5inch/minute. The motion of
the set point is in the direction of lower readings. If the knob settings are
Kc=2Psi/inch of pen travel, ?
I
=1.5 mins, and ?D=0.5. Plot the graph of
output pressure vs. time
7
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This post was last modified on 20 February 2020