DEPARTMENT OF AUTOMOBILE ENGINEERINGB.TECH : AUTOMOBILE ENGINEERING

EXAM

NONTRADITIONAL MACHINING TECHNIQUES

Semester: Max Marks: 100Duration: 3 Hrs. Date:

PART - A (10X2 = 20 Marks) Answer ALL questions

1. Classify Mechanical processes.

2. Write the operating condition of fluid for WJM.

3. Write the operating condition of nozzle for WJM.

4. Define Faraday’s laws.

5. Write the characteristics of ECM.

6. What are the different types of pulsing unit in EDM?

7. Define breakdown in EDM.

8. What are the main basic mechanisms of dielectric breakdown in the

three states of matter?

9. Write the Richardson – Dushman equation for thermionic emission

capability of the cathode in EBM.

10. What is the accelerating voltage, Beam current and power required

for EBM?

PART - B (5X16 = 80 Marks)

11. Explain the need for nontraditional machining processes with case

studies. (16)

(OR)

12. Explain the effect of equipments and tooling in nontraditional

machining processes. (16)

13. a) Write the MRR for ultrasonic machining process.

b) Explain the effect of operating parameters on ultrasonic

machining process. (12)

(OR)

14. Explain the construction and working of EBM process. (16)

15. a) Write the advantages of Electrochemical grinding over

conventional grinding. (6)

b) Explain the electrochemical Honing process. (10)

(OR)

16. Derive the material removal rate for ECM process. (16)

17. Explain different flushing methods in EDM. (16)

(OR)

18. Explain the following theories of material removal concepts in EDM.

a) High pressure theory (5)

b) Static field theory (5)

c) High temperature theory (6)

19. Explain the following plasmatron with schematic diagram.

a) Indirect Arc Plasmatrons (8)

b) Direct Arc Plasmatrons (8)

(OR)

20. Explain the working of Solid state laser and gas laser with schematic

diagram. (16)

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