Question Paper: CAD CAM CAE Question Paper - Dec 18 - Mechanical Engineering (Semester 7) - Mumbai University (MU)

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## CAD CAM CAE - Dec 18

### 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 Cohen-Sutherland Line clipping algorithm

**1.b.**Explain the roughing and finishing canned cycle for turning

**1.c.**Explain rotation with respect to 3D transformation.

**1.d.**Explain the significance of rapid prototyping.

**2.a.**Plot the beizer curve having end points P

_{0}(1,1) and P

_{3}(3,1). the other control points are P

_{1}(2,1) and P

_{2}(4,3). Also find the midpoint of the curve

**2.b.**Explain Feature based Modelling

**3.a.**Describe the transformation M

_{K}of a object about a link K which makes an angle $\phi$ with x-axis. It has slope m and y intercepts as (0,C) with y - axis as shown in figure.

**3.b.**Explain Direct Numerical Control (DNC)

**4.a.**What is the need for concatenation of transformation? Explain with example why the homogeneous co-ordinate system is generally used in graphics, in particular for software implementation.

**4.b.**Explain the procedure of kinematic analysis of a structural system with an example.

**5.a.**Write a part program in APT for the component shown in figure using end mill cutter of 20 mm diameter. Clearly show the axes system chosen with a sketch and the direction of the cutter for the motion statements.

**5.b.**Socio-techno-economic aspects of CIM.

**Write a short note on any FOUR**

**6.a.**Use of CAE in Engineering analysis

**6.b.**Constructive solid geometry and Boundary representation

**6.c.**Automated Storage/ Retrieval System(AS/RS)

**6.d.**3D Printing

**6.e.**APT Statements