What is the exam pattern and passing mark for GTU Manufacturing Technology (3151912)?

The GTU theory examination carries 70 total marks with a duration of 2.5 Hours. Minimum passing criteria is 23 marks (33%). The paper consists of 5 main questions with official marking breakdown and internal choices.

Where can I download the official GTU 3151912 Winter 2023 question paper PDF?

The official GTU question paper PDF is linked directly from Gujarat Technological University's official examination archive. You can view the full paper online or download the original file.

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Gujarat Technological UniversityWinter 2023 examination

GTU 3151912 Manufacturing Technology Winter 2023 Question Paper & PDF

B.E. · Mechanical Engineering · Semester 5 · Subject code 3151912

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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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Q.1

14 Marks

(a)

3 marks

State the chvorinov’s rule. Discuss it briefly

(b)

4 marks

What is the role of electrode coating in shielded metal arc welding?

(c)

7 marks

Differentiate between punching and blanking operations with respect to punch and die dimensions and applications.

Q.2

14 Marks

(a)

3 marks

How is the selection of manufacturing process influenced by

i)Material of the work piece

ii)Quantity to be produced?

(b)

4 marks

Explain following patterns with neat sketch:

i)Match plate pattern

ii)Gated patterns

(c)

7 marks

A slab of size 300* 300 * 50 mm is require to be cast from a molten steel using a top riser of 170 mm diameter. If (d/h) = 2 for riser, Calculate the freezing ratio.

(c)

7 marks

Draw a neat sketch of gating system. Discuss functions of gating system and differentiate between pressurized and unpressurized gating system.

Q.3

14 Marks

(a)

3 marks

Discuss the advantages and limitations of A.C. and D.C. power sources.

(b)

4 marks

What is gas welding? Discuss about various types of flames commonly used in gas welding process with specific application of each one.

(c)

7 marks

Explain with neat sketch, steps involve in investment casting process. Also discuss how an investment casting component is differ than a sand casting component.

(a)

3 marks

Differentiate between soldering and brazing.

(b)

4 marks

Differentiate between TIG and MIG welding processes.

(c)

7 marks

Discuss about resistance welding cycle. Also discuss heat balance and its importance in quality of resistance welded joint.

Q.4

14 Marks

(a)

3 marks

Explain the effects of strain hardening.

(b)

4 marks

Discuss about various types of rolling mill arrangements.

(c)

7 marks

What is extrusion? Differentiate between forward extrusion and backward extrusion.

(a)

3 marks

Explain the following terms:

i)Ingot,

ii)Slab,

iii)Billet

(b)

4 marks

Enlist examples of specific product manufactured by the following forging processes and why?

i)Drop forging

ii)Machine forging

iii)Smith forging

(c)

7 marks

Explain with neat sketch principle and operation of rolling process.

Q.5

14 Marks

(a)

3 marks

Name the two products that can be manufactured by either spinning or deep drawing. Also mention at least one product that cannot be manufactured by spinning but may be manufactured by drawing.

(b)

4 marks

Classify the types of plastics alonwith the properties and applications of plastics.

(c)

7 marks

Enlist various plastic processing technologies. Explain injection moulding process with neat sketches.

(a)

3 marks

Explain following pattern allowances in detail;

i)Draft allowance

ii)Shrinkage allowance

iii)Machining allowance

(b)

4 marks

Define and explain following finishing operations:

i)Lapping

ii)Buffing

iii)Burnishing

iv)Polishing

(c)

7 marks

Explain with neat sketch compression moulding process. Also enlist advantages, limitations and applications of compression moulding process.

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About this paper

Official Gujarat Technological University (GTU) examination paper for Manufacturing Technology (Winter 2023, 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.

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