GUJARAT TECHNOLOGICAL UNIVERSITY
SEMESTER-VI(NEW) — EXAMINATION - SUMMER 2019
--- Content provided by FirstRanker.com ---
Subject Code: 2162103 Date: 10/05/2019
Subject Name: Powder Metallurgy
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
--- Content provided by FirstRanker.com ---
MARKS
Q.1 (a) What are the advantages of manufacturing gears by powder 03 metallurgy route compare to casting method?
(b) Explain Green spring effect. 04
--- Content provided by FirstRanker.com ---
(c) Write the Advantages and limitations of powder metallurgy 07
Q.2 (a) What are the advantages of particle size analysis by sieving 03 method?
(b) Describe the role of lubrication during compacting. 04
(c) Draw the flow diagram for polycrystalline ferrite preparation. Write 07 applications of ferrite material
OR
--- Content provided by FirstRanker.com ---
(c) Explain water atomization process with schematic diagram. What 07 will be the effect on particle size and shape of powder if cooling is carried out by inert gas.
Q.3 (a) Define: apparent density, flow rate, and friction index. 03
(b) What are the basic requirement should be fulfill by powder mixing 04 plant?
(c) Write short note on Isostatic pressing 07
OR
--- Content provided by FirstRanker.com ---
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
--- Content provided by FirstRanker.com ---
(c) What do you understand by Dispersion strengthened materials? List 07 various manufacturing methods for it. Describe application and limitation of dispersion strengthened materials
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
--- Content provided by FirstRanker.com ---
Q.5 (a) The main factor is not the particle size but particle size distribution 03 for altering the apparent density-Justify the statement.
(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
--- Content provided by FirstRanker.com ---
(b) Write short note on cermets. 04
(c) Write short note on liquid phase sintering 07
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU BE 2019 Summer Question Papers || Gujarat Technological University