
	Trending ▼ ICSE CBSE 10th ISC CBSE 12th CTET GATE UGC NET Vestibulares ResFinder

2003 Course Powder Metallurgy (Elective I)

3 pages, 29 questions, 0 questions with responses, 0 total responses,

	pune_eng	+Fave Message
	Profile Timeline Uploads Q & A

Home > pune_eng >

Instantly get Model Answers to questions on this ResPaper. Try now!
NEW ResPaper Exclusive!

Formatting page ...

Total No. of Questions :12] P1046 [Total No. of Pages : 3 [3864]-176 B.E.(Prod.) POWDER METALLURGY (Elective - I) (2003 Course) (411085) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) 2) 3) 4) 5) 6) Answer Three questions from Section I and Three questions from SectionII. Answers to the two sections should be written in separate books. Neat diagrams must be drawn wherever necessary. Figures to the right indicate full marks. Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. Assume suitable data, if necessary. SECTION - I Q1) a) Discuss in brief some of the modern developments in powder production, compacting & sintering. [8] b) What is meant by metal powder characteristics? Discuss the chemical,physical, & technological characteristics of metal powders.[8] OR Q2) a) What is meant by size distribution of metal powders? Discuss its importance in field of P/M. [8] b) Describe briefly - Internal porosity of powders, compression ratio, flow rate. [8] Q3) a) Explain the role of different factors on the degree of compaction of a metal powder. To what extent can the theoretical density be approached by compacting. [9] b) What are the factors that are required to be considered for a die design? Does the die design impose any limitation on the compacting load?[9] OR P.T.O. 1 Q4) a) What are the advantages of isostatic pressing? Describe the wet & dry bag tooling methods of isostatic pressing. [8] b) Describe the sizing & coining. [5] c) Describe briefly the role of lubricants. [5] Q5) a) What specific role is played by diffusion during sintering of a metal powder compact? How it is different from diffusion in metals attained by casting? [8] b) Explain, It is necessary to have three distinct zones in a continuous [8] sintering furnace . OR Q6) a) What physical changes take place during sintering? Discuss the role of recrystallisation & grain growth in sintering [8] b) Discuss in brief about hot & cold pressing. [8] SECTION - II Q7) a) Explain powder forging stating clearly the difference between powder forging & conventional fasing. [8] b) Explain the advantages, disadvantages & applications of Hot isostatic pressing. [8] OR Q8) Write short note oni) [16] Role of polymer blends ii) Roll compaction iii) P/M forging iv) Hot compaction Q9) a) What is self lubricating action? Describe the different steps involved in producing porous bearings. [8] b) Critically discuss the shaping methods used for production of cemented carbide parts. Also describe in brief the applications of cemented carbide [8] tools. [3864]-176 2 -2- OR Q10) With the help of a neat flow chart describe production of following, depicting all important features[16] i) Ferrites ii) Friction materials Q11) a) Why has machining of P/M parts become a necessity? outline the general rules you would adopt for machining of the sintered parts. [9] b) Write an essay on the surface treatments of sintered P/M parts. [9] OR Q12) Write short note on (any three): i) [18] Production of nano-composites by P/M. ii) Heat treatment of P/M parts. iii) Near net shape production of P/M parts. iv) Energy conservation in P/M. nnn [3864]-176 3 -3-

Formatting page ...

Tags : Pune, Engineering, University of Pune, Engineering question papers, Pune University, previous year question papers, question papers, india, model question paper, pune university paper pattern, pune university syllabus, old question papers

pune_eng chat

Horizontal lines at:
Guest Horizontal lines at:
AutoRM Data:
Box geometries: