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Wednesday, 18 June 2014

Mechanical system design-Model question paper for B.E/B.Tech Mechanical Engineering

1(a) What are the elements of a system? Explain briefly. (6 Marks)
(b) Explain about the environment in which the problem is formulated. (6 Marks)
(c) Discuss the hierarchical nature of engineering problems. Explain the “need statement”. (8 Marks)
2(a) Explain the purpose, scope and applicability of System Development Life Cycle. (8 Marks)
(b) What is system documentation? Explain. (4 Marks)
(c) Differentiate between physical and mathematical model. (4 Marks)
(d) Briefly explain the need for modeling. (4 Marks)
3(a) What is the necessity of mathematical formulation in system design? (6 Marks)
(b) What is the difference between AON and AOA in network convention? (4 Marks)
(c) What are the basic characteristics of a linear programming problem?(4 Marks)
(d) Solve the LPP by big M method:
Min.z = 2x1+5x2
Subject to constraints
x1,x2≥0 (6 Marks)
4(a) List out different engineering optimization applications. (6 Marks)
(b) Maximize the profit for the following function 20x1+36x2+4x1x2-4x12-3x22
Where x1 is the labour cost and x2 the item cost. (6 Marks)
(c) What are the stages of evaluation? Explain with practical example. (8 Marks)
5 (a) Discuss the steps in decision making. (6 Marks)
(b) Explain EMV and decision theory. (6 Marks)
(c) An investor has two independent options A and B, but he lacks the capital to undertake both of them simultaneously. He may choose option A first and if A is successful, then he may go for option B and Vice versa, The probability pf success for A is 65% while for B it is 45%. The initial investment required for both is of Rs2500, and both return nothing if the venture is unsuccessful. Successful completion of A will return Rs 4500 (over cost) and successful completion of B will return Rs.6500 (over cost). Find the best strategy and make the decision tree for the investor. (8 Marks)
6 (a) What is reliability? Discuss various reliability models used in practice for maintenance of equipment. (6 Marks)
(b) Briefly discuss the sources from where reliability data can be obtained. (4 Marks)
(c) Why does the failure pattern of equipment not remain uniform throughout its life? Explain. (6 Marks)
(d) A system consists of four components connected in series with failure rates of 0.75, 1, 0.1 and 0.1. Compute the probability of their failure after six months. (4 Marks)
7 (a) What are the stimulation models? Explain. (6 Marks)
(b) What is the importance of system concepts in project planning? (6 Marks)
(c) Customers arrived at ticket counter for the required service. Assume that inter arrival and service times are constant and given by 1.6 and 3.8 time units respectively. Simulate the system for 14 time units. What is the average waiting time per customer? What is the percentage idle time of the facility? Assume that the system starts at t = 0. (8 Marks)
8 (a) Discuss the principle and advantages of group technology coding. (6 Marks)
(b) Discuss the relevance of FMS from the point of view of work centre utilization. (4 Marks)
(c) What are the barriers to Concurrent Engineering? (4 Marks)
(d) What are the techniques of Quality Function Deployment (QFD)? (6 Marks)

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