Download GTU BE/B.Tech 2019 Summer 6th Sem New 2162103 Powder Metallurgy Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 6th Sem New 2162103 Powder Metallurgy Previous Question Paper

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code: 2162103 Date: 10/05/2019
Subject Name: Powder Metallurgy
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS

Q.1 (a) What are the advantages of manufacturing gears by powder
metallurgy route compare to casting method?
03
(b) Explain Green spring effect. 04
(c) Write the Advantages and limitations of powder metallurgy 07

Q.2 (a) What are the advantages of particle size analysis by sieving
method?
03
(b) Describe the role of lubrication during compacting. 04
(c) Draw the flow diagram for polycrystalline ferrite preparation. Write
applications of ferrite material
07
OR
(c) Explain water atomization process with schematic diagram.What
will be the effect on partical size and shape of powder if cooling is
carried out by inert gas.

07
Q.3 (a) Define: apparent density, flow rate, and friction index. 03
(b) What are the basic requirement should be fulfill by powder mixing
plant?
04
(c) Write short note on Isostatic pressing 07
OR
Q.3 (a) Differentiate the Blending and Mixing. 03
(b) Explain high energy rate forming method. 04
(c) Explain die compaction technique in brief with mandatory features 07

Q.4 (a) Draw schematic diagram of powder extrusion pressing. 03
(b) Write properties of sintered friction materials 04
(c) What do you understand by Dispersion strengthened materials? List
various manufacturing methods for it. Describe application and
limitation of dispersion strengthened materials
07
OR
Q.4 (a) Explain in brief Powder forging 03
(b) Describe the advantages and limitation of Hot pressing. 04
(c) Write short note on electrical contact materials. 07
Q.5 (a) The main factor is not the particle size but particle size distribution
for altering the apparent density-Justify the statement.
03
(b) Describe the stages of sintering. 04
(c) What is powder rolling? Explain in detail. 07
OR

Q.5 (a) Tap density measurement reduce the cost of the powder? How? 03
(b) Write shortnote on cermets. 04
(c) Write short note on liquid phase sintering 07
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