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1997 Course Production Processes & Design (Elective II)

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Total No. of Questions : 10] P1599 [Total No. of Pages : 3 [3764]-1019 B.E. (Production Engg.) PRODUCTION PROCESSES AND DESIGN (1997 Course) (Elective - II) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer any 3 questions from each section. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) 6) Use of logarithmic tables, slide rule, electronic pocket calculator is allowed. Assume suitable data, if necessary. SECTION - I Q1) a) State & explain in brief desirable properties of design specification. [6] b) What is analysis of interconnected decision areas (AIDA)? How will it be useful to product design? [6] c) Explain product life cycle in brief. Q2) a) What are the considerations of good product design? [4] [6] b) What are various phases in product development process? [6] c) Explain the basic structure of product innovation process. [4] Q3) a) State design rules for plastic moulded parts. Discuss the design factors [6] for plastics. b) Discuss process selection parameters essential for the success of the design. [4] c) State the role of aesthetic in product design. [3] d) What is product message? State its importance with example. [3] P.T.O. Q4) a) Prepare development plan for product Washing machine using QFD method. [8] b) Explain Classification of casting according to metal to be cast with [4] example. c) What are composites? What are the aspects of design with composites? [4] Q5) Write short note on: (Any 3) [18] a) Analysis of interconnected decision areas (AIDA). b) Functional attributes in product design. c) Tolerance build up in assemblies. d) Design of M/c tool parts. e) Quality function deployment(QFD). SECTION - II Q6) a) Define system reliability. Explain four significant reliability factors. Explain following types of configurations: i) Series configuration. ii) [10] Parallel configuration. iii) Mixed configuration. b) If the device has a failure rate of 2 10 6 failure/hours what is its reliability in an operating period of 500 hours. If there are 2000 items in the test, how many failures are expected in 500 hours? Assume a constant failure rate. Also calculate the MTBF. [6] Q7) a) Explain tolerance built up in assemblies with example. [8] b) Determine the control limits for X & R charts if sum of X = 909.170 and sum of R = 6.250, Number of subgroup = 20. It is given that A2 = 0.18, D3 = 0.41, D4 = 1.59 and d2 = 3.735. Also find process capability. [8] [3764]-1019 -2- Q8) a) Explain Manufacturing of glass. Discuss Problem of manufacturing ceramic parts. [6] b) Explain Role of allowance, process capability and tolerance in detail [4] to design and assembly. c) What is DFM? Give benefit of DFM. [6] Q9) a) Explain buffing & lapping. Which process gives a higher grade of finish & why? [4] b) Why investment casting is preferred for manufacturing asymmetric complicated shapes? [4] c) What do you mean by design for uniform strength? Explain with example. [4] d) What is difference in strength & hardness of a plastic injection moulded [4] part & a compression moulded part? Q10) Write short note on: (Any 3) [18] a) Dimensional tolerances and customer preferences. b) Statistical consideration for factor of safety. c) Economics of tooling. d) Rapid prototyping. e) Design of brazed joints. rrr [3764]-1019 -3-

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