Question Paper: CAD CAM CAE Question Paper - Dec 17 - Mechanical Engineering (Semester 7) - Mumbai University (MU)
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## CAD CAM CAE - Dec 17

### Mechanical Engineering (Semester 7)

Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.

Attempt any FOUR

1.a. Viewing Transformation
(5 marks) 00

1.b. Why is the rapid prototyping used?
(5 marks) 00

1.c. Benefits of CIM.
(5 marks) 00

1.d. What is the need for concatenation of transformation?
(5 marks) 00

1.e. Machining Centers and its types
(5 marks) 00

1.f. Parameter optimization
(5 marks) 00

2.a. Determine the parametric representation of the line segment between the position vectors P1]1 1] and P2[4 5]. Find the slope and tangent vectors for the line.
(10 marks) 00

2.b. Explain Selective Laser Sintering (SLS). How is it different from 3D printing?.
(10 marks) 00

3.a. Explain significance of

i Data capture techniques and ii Socio-techno-economic aspects with respect to Computer Integrated Manufacturing (CIM) and technology driven practices.

(10 marks) 00

3.b. A square with an edge length of 10 units is located on the origin with one of edges at an angle of 30$^\circ$ with the X-axis. calculate the new position of the square if it is rotated about the Z-axis by an angle of 30$^\circ$ in the clock wise direction.
(10 marks) 00

4.a. What are the different types of errors which may get introduced while converting the CAD solid model into RPT compatible format?
(6 marks) 00

4.b. What are the major steps to solve the problem using FEM? Whether it gives exact answer? Why it has become popular?
(6 marks) 00

4.c. The co-ordinates of four data points P0, P1,P2 and P3 are(2,2,0), (2,3,0), (3,3,0) and (3,2,0) respectively. Find the equation of Bezier curve and determine the co-ordinates of points on the curve for u=0,0.25,0.5,0.75.
(8 marks) 00

5.a. Explain CAE Case study based on modeling and analysis of structural (vibration analysis) system.
(10 marks) 00

5.b. Write complete part program using the ISO codes for the different holes present in the component as shown in figure. The operations and tools required are given below.

Op.No. Description Tools required
1 Drill one hole Twist drill 5 mm dia
2 Counter bore one hole End mill 8 mm dia
3 Drill three holes Twist drill 5 mm dia
4 Tapping three holes Machine Tap M6

(10 marks) 00

6.a. Role of CAD/CAM in CIM
(5 marks) 00

6.b. Rapid Tooling
(5 marks) 00

6.c. P & H refinement methods of CAE
(5 marks) 00

6.d. Feedback devices
(5 marks) 00