Question Paper: CAD CAM Question Paper - Jun 18 - Mechanical Engineering (Semester 7) - Jawaharlal Nehru Technological University (JNTUH)
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## CAD CAM - Jun 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.

PART_A (25 MARKS)

1.a. List out input and output devices of CAD.
(2 marks) 00

1.b. What are the importance of continuity curves?
(3 marks) 00

1.c. What is subdividing?
(2 marks) 00

1.d. Write the parametric equation of ruled surface.
(3 marks) 00

1.e. What do you understand the M and G function?
(2 marks) 00

1.f. Compare the NC, CNC and DNC.
(3 marks) 00

1.g. What is the need of part analysis?
(2 marks) 00

1.h. What is composite part? Give an example of your own?
(3 marks) 00

1.i. Define the FMS.
(2 marks) 00

1.j. what is the role of computers in quality control?
(3 marks) 00

PART_B (50 MARKS)

(5 marks) 00

2.b. What are the application of computer in design?
(5 marks) 00

OR

3.a. Differentiate between the interpolation and approximation of curves.
(5 marks) 00

3.b. Drive the parametric equation of hermite cubic curve? list out the characteristics.
(5 marks) 00

4.a. Define bezier surface? Explain various characteristic of this surface.
(5 marks) 00

4.b. A circle with radius for unit having centre located at point (20, 10, 0) is rotated about the x-axis by an angle of 2Π to obtain an surface revolution. Calculate the surface point at ∅=Π and ∅=Π.
(5 marks) 00

OR

5.a. Enlist and explain with different Boolean operation in solid modelling.
(5 marks) 00

5.b. explain the cell decomposition and spatial occupancy enumeration.
(5 marks) 00

6.a. How NC machines are classified? Explain them with neat sketches.
(5 marks) 00

6.b. With neat sketches, write down the neat procedure for manual part programming.
(5 marks) 00

OR

7.a. Explain the concept of adaptive control of NC machines.
(5 marks) 00

7.b. List out various type of G and M codes function.
(5 marks) 00

(5 marks) 00

8.b. what is the production Flow Analysis? Discuss the various steps involved in PFA.
(5 marks) 00

9.a. How do you overcome the difficulties in traditional process planning of adopting method.
(5 marks) 00

9.b. Explain the machine cell design.
(5 marks) 00

10. Discuss the following types of layouts in the design of FMS. a) Circular layer b) Linear layers c) Low player d) Free layout.
(10 marks) 00

OR

11. Explain following inception system: a) On-line inspection b) Off-line inspection c) In-process inspection d) Process inspection.
(10 marks) 00