Janardan Rai Nagar Rajasthan Vidyapeeth 2007 Diploma Mechanical Engineering ADVANCED MANUFACTURING PROCESSES - Question Paper

DTA3 / DTM3- ADVANCED MANUFACTURING PROCESSES

Time : 3 hrs Maximum marks : 75

 

Instruction:

1. Question paper is divided into Group A, Group B and Group C

2. Each Group is 25 Marks

3. Figure to the right in bracket indicates marks.

4. Good Handwriting is expected

5. Assume suitable data if necessary.

 

Group A (25 Marks)

 

Answer any three questions (Question 1 is compulsory)

 

Q.1. What do you mean by the terms Upmilling and Down Milling? (05)

Q.2. Write short notes on point to point in positioning NC systems? (10)

Q.3. What is buffing? (10)

Q.4. Show boring haps and heads. (10)

Q.5. Describe briefly the construction and working of a horizontal boring machine with the help of a neat sketch? (10)

Group B (25 Marks)

 

Answer any three questions (Questions 6 is compulsory)

Q.6. Highlight practical application of broaching. (05)

Q.7. Write a program to demonstrate the incremental positioning of the tool in CNC machining process? (10)

Q.8. Briefly explain the various bonding process in manufacturing of grinding wheels? (10)

Q.9. Write short notes on- (10)

(a)    E.C.M. (Electro chemical Grinding)

(b)   A.J.M. (Abrasive Jet Machining)

Q.10. What is Electron Beam Machining? State its applications? (10)

 

Group C (25 Marks)

 

All Questions are Compulsory.

 

Q.11 (A)Fill in the blanks ( each question carry 2 marks)

(i) Buffing is basically a __________.

(ii) Broaching is primarily done for ____________ production.

(iii) Burnishing operations done with help of _____________

(iv) In E.D.M., the material of tool is ____________________.

(v) During grinding operation the increase in wheel speed increases __________

            but decrease.

 

 

(B)Multiple choice Question (Each question carries 2 marks)

(i) The part of the Broach which enters along the hole before the teeth and keeps the

broach in proper alignment is called.

(a) Rear pilot (b) Front pilot (c) Finishing Teeth (d) Roughening teeth

 

(ii) It is the reciprocating member of the pass, that slides with in the press guids

(a) Bolsetplate (b) pitman

(c) Ram (d) flywheel

(iii) Grinding wheel is dressed for ________ the wheel.

(a) Truing (b) Sharpening

(c) Balancing (d) Grinding

(iv) Dielectric is essentially required in-

(a) U.S.M. (b) E.C.M.

(c) E.D.M. (d) E.B.M.

(v) Circular interpolation is performed by

(a) Hardware (b) Software (c) Controller unit (d) Motion interpolators.

 

 

(C)True or false (each question carry 1 marks).

(i) EDM is generally preferred for hard materials.

(ii) The Surface of slip gauge is produced by lapping.

(iii) Automobile gears are generally manufactured by hobbing.

            (iv) In Broaching Operation completes in two strokes.

(v) In rubber bond for grinding wheels, sulfur is added to reduce the shocks and

            vibrations.

 

 

 

 

 

 

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