Q.1
14 Marks(a)
Write down requirements of a sound control system.
(b)
Define ‘Control system’. Classify in brief Control systems.
(c)
With suitable examples discuss Open loop system and Closed loop system. State advantages of Closed loop system.
Gujarat Technological UniversitySummer 2026 examination
GTU 2151908 Control Engineering Summer 2026 Question Paper & PDF
B.E. · Mechanical Engineering · Semester 5 · Subject code 2151908
- 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)
Define ‘Signal flow graph’. Can we draw Signal flow graph from Block diagrams?
(b)
Define the term ‘Transfer function’. Write down properties of Transfer function.
(c)
Obtain the Transfer function of the block diagram given in Figure 1 using the block diagram reduction rules.
OR
(c)
What is Block Diagram? Explain important rules for Block diagram reduction.
Q.3
14 Marks(a)
Explain translational mechanical and rotational mechanical systems.
(b)
Obtain system equations for the mechanical system shown in Figure 2.
(c)
Describe Force-Voltage analogy and Force-Current analogy as applied to electrical analogies for Mechanical systems.
OR
(a)
Define the following terms : (a) Rise time (b) Delay time (c) Settling time
(b)
Discuss in brief Routh’s stability criterion.
(c)
Obtain transfer function for the signal flow graph shown in Figure 3 using Mason’s Gain formula. Figure 3 Signal Flow Graph
Q.4
14 Marks(a)
Explain the concept of Stability and the types of stability.
(b)
Compare critically Modern control theory with conventional control theory.
(c)
Explain unit step response of first order linear time invariant systems.
OR
(a)
State advantages of frequency response analysis.
(b)
Critically compare Hydraulic control systems with Pneumatic control systems.
(c)
List the basic types of control actions. Explain the PID controller briefly.
Q.5
14 Marks(a)
What is FRL unit in Pneumatic system?
(b)
Explain Pneumatic nozzle-flapper amplifier.
(c)
A Unity feedback system has an open loop transfer function :
Sketch the root locus.
OR
(a)
Write note on “Directional control valve”.
(b)
List various components used in any hydraulic circuits.
(c)
Draw and explain Proportional-Derivative (PD) Hydraulic controller.
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About this paper
Official Gujarat Technological University (GTU) examination paper for Control Engineering (Summer 2026, B.E. · Mechanical 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.