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

1.a. Explain the convergence in FE analysis
(5 marks) 00

1.b. Explain application of RP in MEMS.
(5 marks) 00

1.c. Explain the significance of Graphic Standards.
(5 marks) 00

1.d. Briefly explain the advantages and disadvantages of NC machines.
(5 marks) 00

2.a. A triangle PQR with vertices P(2,5), Q(6,7) and R(2,7) is to be reflected about the line y = 0.5x+3. Determine the final transformation matrix and the co-ordinates of the reflected triangle.
(12 marks) 00

2.b. How do you set work part zero, zero on a CNC machine?
(4 marks) 00

2.c. What are the feedback devices used in NC/CNC machine?
(4 marks) 00

3.a. Write a program in C++ using object oriented concept for 2D transformation which includes function for rotation.
(8 marks) 00

3.b. What do you mean by complex engineering problem? With suitable example, explain the complexities involved and tolls chosen to solve it.
(8 marks) 00

3.c. Enlist CIM hardware and software
(4 marks) 00

4.a. What do you mean by Synthetic curves? What are the different types of synthetic curves and their continuity conditions?
(10 marks) 00

4.b. Write a manual part program in G- M codes for generating a part as shown in Figure 1. Size of raw material is $\phi$85 mm by 112mm. Explain each code. Assume suitable data if required. Use canned cycle code for Facing, Turning and Taper Turning operations.

enter image description here

(10 marks) 00

5.a. Explain the steps used in Rapid Prototyping process.
(10 marks) 00

5.b. Write a complete APT part program to machine the outline of the geometry shown in fig.2 the top view up to a dept of 5 mm in one cut. The end mill used is 20 mm diameter. Assume suitable speed and feed for machining . Fig. 2

enter image description here

(10 marks) 00

Write short note on any FOUR

6.a. Cohen-Sutherland clipping algorithm
(5 marks) 00

6.b. Major steps of FEM
(5 marks) 00

6.c. Fused Deposition Modelling (FDM)
(5 marks) 00

6.d. Absolute versus incremental positioning in NC Machine tools
(5 marks) 00

6.e. Affine Transformation and its properties.
(5 marks) 00

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