Gujarat Technological UniversitySummer 2026 examination

GTU 3141907 Fundamentals of Machine Design Summer 2026 Question Paper & PDF

B.E. · Mechanical Engineering · Semester 4 · Subject code 3141907
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Total
70 marks
To pass
23 marks (33%)
Duration
2.5 Hours 10:30 AM – 1:00 PM
Questions
5 with internal choice
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8 of 25 questions on this paper were also asked in other years. 2 more are types of question GTU sets again with new data. Each is marked below with the years it appeared.See all 10 repeated 3141907 questions, most asked first

Q.1

14 Marks
(a)
3 marks
Define the following terms:
i)Standardization
ii)Polar Moment of inertia
iii)Center of gravity
(b)
4 marksAsked in 2 of 2 papers
Define:
i)Poisson’s ratio
ii)Bulk modulus
iii)Hooke’s law
iv)Volumetric strain.

Also asked in Summer 2025 Q4a

(c)
7 marks

Explain the different types of loads, beams and supports related to beams with neat sketches. Also state the applications of each.

Q.2

14 Marks
(a)
3 marksAsked in 2 of 2 papers
Explain limits, fits and tolerance.

Also asked in Summer 2025 Q1a

(b)
4 marks
Justify, why cotter is taper? State the applications of a cotter joint.
(c)
7 marksSame type asked in 2 of 2 papers

Design a knuckle joint to connect two mild steel bars under a tensile load of 25 kN. The allowable stresses are 60 MPa in tension, 45 MPa in shear and 85 MPa in crushing.

Also asked in Summer 2025 Q2c OR

(c)
7 marksAsked in 2 of 2 papers
Discuss the design procedure of a cotter joint.

Also asked in Summer 2025 Q1c

Q.3

14 Marks
(a)
3 marks
Explain ergonomics consideration in machine design.
(b)
4 marksAsked in 2 of 2 papers
Derive the bending equation. Also state the assumptions made in this derivation.

Also asked in Summer 2025 Q3b OR

(c)
7 marks
Find moment of inertia of the shaded area shown in the Fig. 1 about the axis AB.
GTU Fundamentals of Machine Design (3141907) Summer 2026 Question 3(c) Diagram
(a)
3 marks
Explain Aesthetic consideration in machine design.
(b)
4 marks
Give a difference between shaft, spindle and axle.
(c)
7 marks
Derive a relation between modulus of elasticity, modulus of rigidity, Poisson’s ratio.

Q.4

14 Marks
(a)
3 marksAsked in 2 of 2 papers
Discuss the different types of keys.

Also asked in Summer 2025 Q2a

(b)
4 marksAsked in 2 of 2 papers

Define torsion and polar modulus. Why hollow circular shafts are preferred when compared to solid circular shafts?

Also asked in Summer 2025 Q5a, Summer 2025 Q4a OR

(c)
7 marks

A circular steel pipe of external diameter 60 mm and thickness 8 mm is used as a simply supported beam over an effective span of 2 m. If permissible stress in steel is 150 N/mm², determine the maximum concentrated load that can be carried by it at mid span.

(a)
3 marks
Explain the Soderberg criteria with diagram.
(b)
4 marks
Draw and explain S-N curve.
(c)
7 marks
Discuss the design procedure of a right-angle bell crank lever.

Q.5

14 Marks
(a)
3 marks
Define ‘slenderness ratio’. State the assumptions used in Euler’s column theory.
(b)
4 marksAsked in 2 of 2 papers

Define a stress concentration factor? State the different methods to reduce stress concentration with neat sketch.

Also asked in Summer 2025 Q4b OR

(c)
7 marks

Assume the data of the intermediate shaft illustrated in the previous example. The permissible angle of twist for the shaft is 0.25° per meter length and the modulus of rigidity is 79300 N/mm². Determine the shaft diameter on the basis of torsional rigidity.

(a)
3 marksAsked in 2 of 2 papers
Explain the condition of overhauling and self-locking of screws?

Also asked in Summer 2025 Q5a OR

(b)
4 marksSame type asked in 2 of 2 papers

Discuss the various types of power threads. Give two practical applications for each type.

Also asked in Summer 2025 Q3c, Summer 2025 Q3c OR

(c)
7 marks
Explain in detail Rankine’s formula for the column.

More Fundamentals of Machine Design papers

Questions repeat across sessions. Working through two or three papers shows you which topics GTU asks most.

Summer 202570 marks · 5 questions

Other Semester 4 subjects

BE Mechanical

2141905
Complex Variables and Numerical Methods
3141901
Mechanical Measurement and Metrology
3141906
Fluid Mechanics and Hydraulics Machines
3141908
Manufacturing Processes

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About this paper

Official Gujarat Technological University (GTU) examination paper for Fundamentals of Machine Design (Summer 2026, B.E. · Mechanical Engineering, Sem 4). 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.

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