Q.1
14 Marks(a)
Give the Laplace transform for the following
1Sin kt
2Cosh kt
3𝑒−𝑎𝑡 sin 𝑘𝑡
(b)
State and prove the Initial-Value Theorem
(c)
Determine the x(t) for x(s) 𝑥(𝑠) = 1 𝑠2(𝑠 + 1)
Gujarat Technological UniversitySummer 2026 examination
GTU 3150504 Instrumentation and Process Control Summer 2026 Question Paper & PDF
B.E. · Chemical Engineering · Semester 5 · Subject code 3150504
- Total
- 70 marks
- To pass
- 23 marks (33%)
- Duration
- 2.5 Hours 2:30 PM – 5:00 PM
- Questions
- 5 with internal choice
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Q.2
14 Marks(a)
What is transportation lag? Explain with example.
(b)
Explain first order system by giving physical example of mixing process.
(c)
Derive the transfer function of mercury thermometer. List the assumptions and justify them.
OR
(c)
A thermometer having a time constant of 1 min is initially at 34°C and steady state condition. It is immersed in a bath maintained at 100°C at time t = 0. Determine the temperature reading of thermometer at t = 1.1 min.
Q.3
14 Marks(a)
Explain the overshoot, decay ratio and response time for second order underdamped system.
(b)
What is Servo Problem? Explain with example from chemical industry.
(c)
Derive the transfer function of damped vibrator as second order system and find the critically damped step response.
OR
(a)
With neat sketch explain the various parts of control system.
(b)
Differentiate between Interacting and Non-interacting system.
(c)
Discuss the rules for reduction of block diagram with example of each.
Q.4
14 Marks(a)
Derive the overall transfer function of PID control.
(b)
What is ratio control? Give important applications of it in chemical industry.
(c)
The characteristics equation of control system is given as following 𝑠3 + 6𝑠² + 11𝑠 + 6(1 + 𝐾𝑐) = 0
1)Determine the value of 𝐾𝑐 for which system is stable
system using Routh test
2)Determine the roots of the characteristic equation when
value of 𝐾𝑐 for which the system is on the threshold of
instability.
OR
(a)
What is ON/OFF control? Discuss applications of ON/OFF Control.
(b)
What is regulator Problem? Explain with example from chemical industry.
(c)
Discuss Phase margin and Gain margin using stability criteria for Bode diagram.
Q.5
14 Marks(a)
List the various methods used in industrial process for pressure measurement.
(b)
Explain the working principal and construction of bimetallic thermometer.
(c)
Discuss the construction and working of Distributed Control System (DCS) with all merits and demerits.
OR
(a)
List the various methods used in industrial process for liquid level measurement.
(b)
Discuss the working principal of bubbler system
(c)
Explain principle, construction and working of radiation pyrometer.
More Instrumentation and Process Control papers
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Other Semester 5 subjects
BE Chemical
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About this paper
Official Gujarat Technological University (GTU) examination paper for Instrumentation and Process Control (Summer 2026, B.E. · Chemical Engineering, Sem 5). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.
Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.