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2003 Course CAD/CAM & Automation

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Total No. of Questions : 12] P1612 [Total No. of Pages : 5 [3764] - 141 B.E. Mechanical & Mechanical Sand Wich CAD/CAM AND AUTOMATION (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answers to the two sections should be written in separate books. 2) Neat diagrams must be drawn wherever necessary. 3) Figures to the right indicate full marks. 4) Use of logarithmic tables slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 5) Assume suitable data, if necessary. SECTION - I Q1) a) b) c) Given a point P = (2, 4, 8) and using the homogeneous representation calculate P* if P is translated by d = 3i 4j 5k and then scaled uniformly by s = 1.5. [6] Show that the midpoint of a line transformed to the midpoint of the transformed lines. [5] What does mapping mean? What are the various applications for which mapping can be used? [5] OR Q2) a) b) c) A triangle PQR represented as P(30, 20), Q(90, 20) and R(30, 80). It is to be scaled by a factor of 0.5 about a point A(50, 40). Determine the composite transformation matrix and the new coordinates of the triangle. [6] Show that : [5] i) Translation is commutative. ii) Mirror and two-dimensional rotation about Z-axis are not commutative. What is meant by geometric transformation? What is the need for it? What is its role in model construction and viewing? [5] P.T.O.

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