Metal Working Process B.E Question Paper : jaduniv.edu.in
Name of the University : Jadavpur University
Department : Metallurgical Engineering
Degree : B.E
Subject Name : Metal Working Process
Year/Sem : IV/I
Website : jaduniv.edu.in
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/dspace.jdvu.ac.in/5455-Metal%20412%2024.pdf
Metal Working Process Question Paper :
Bachelor of Metal Engg. Final Examination, 2009 :
(4th Year, 1st Semester)
Time : Three hours
Related : Jadavpur University Physics of Metals B.E Question Paper : www.pdfquestion.in/5453.html
Full Marks : 100
Answer any five questions. :
1. State the yield criteria and its importance in metal working. Which criteria is more often used in design and explain why ? “Metal working theory begins exactly where structural theory ends” — Explain. State the general characteristics of any manufacturing process and mention the key to the successful metal working. 10+10
2. How do you classify the metal working process ? Give example in each case. Discuss the carious factors that influence the working process. 10+10
3. Describe with neat sketches the classification of rolling mill. State their advantages, limitations and applications. 20
4. a) Considering both the upper and lower rolls do work against the roll separating force, find out the total work done in one minute and the total amount of electricity concerned.
b) How rolling load is affected by the initial thickness of the stock and speed ?
c) Why is it not possible to reduce thickness of a strip below a certain limit ? 8+6+6
5. a) What do you mean by ‘Fibre Structure’ ? Explain with example the usefulness of such structure in forged m/c parts.
b) Discuss in brief the different types of equipments used in forging stating their advantages, limitations and applications.
c) How forgeability can be improved ? 4+12+4
6. Justify the following statements : 5×4=20
a) It is necessary to design the ‘flash’ with proper dimensions:
b) Both under and over drought are important in rolling will.
c) Like area, the shape of the pressure distribution curve
is very important in rolling.
d) Amount of deformation in extrusion process is usually represented by ‘Extrusion Ratio’ not by ‘reduction in area’.
e) The orange peel effect occurs in steel of relatively large grain size.
7. a) Discuss the different types of extrusion process and their merits and demerits. How does the various factors influence the force required to cause extrusion?
b) What do you mean by ‘Redundant Work’ ? Discuss the deformation behaviour in extrusion process and role of redundant work. 12+8
8. Write short notes on (any four) : 5×4=20
a) Manufacture of Seamless pipes and tubes
b) Variables in ware Drawing
c) Roll Pass Design
d) Deep Drawability and limiting draw ratio.
e) Rolling Defects.
Syllabus :
Metal Working Processes :
Concepts of stress & plastic state of deformation – principal stress, normal stress, hydrostatic stress, shear stress etc., Yield Criteria – Von Mises & Tresca. Elements of metal deformation processes – Rolling: hot rolling & cold rolling;
Forging : open die forging, closed die forging & press forging; Extrusion: direct, indirect & Aluminium extrusion; Wire drawing; Sheet metal working; Stretch forming for foils. Deformation load calculations. Defects & limitations, Comparison of metal working & shaping processes
Material Engineering :
Basic understanding of Dielectric and Magnetic materials, concept of polarization and local field. Dielectric constant, loss and relaxation time – concept of complex permittivity. Ferro- electric ceramics and their temperature dependent response.
Origin of interaction in ferrimagnetic materials, Spinel ferrite, rare earth garnets and hexagonal ferrites. Structural ceramics- Silicon carbide, silicon nitride and transformation toughened based ceramics