Winter 2015 Manufacturing Engineering-1 Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING – SEMESTER – III • EXAMINATION – WINTER 2015
Subject Code: 3331901 Date: 17- 12- 2015
Subject Name: MANUFACTURING ENGINEERING -1
Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.
2. Make Suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Use of programmable & Communication aids are strictly prohibited.
5. Use of only simple calculator is permitted in Mathematics.
6. English version is authentic.

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Q.1 Answer any seven out of ten. 14

1. Define ductility.

2. Give Factors which are affecting Recrystalisation temperature.

3. Define bending.

4. Write name of different types of Gas flames.

5. Give full Name of PAW, TIG & SAW.

6. Functions of Runner & Risers in casting process.

7. Give four advantages of casting process.

8. Name four types of cores.

9. Draw four types of Weld Joints.

10. Differentiate soldering and brazing.

Q.2 (a) Explain factors affecting the drawing Process. 03

OR

(a) What is pattern? Explain the nacecity of patter in casting. 03

(b) List various factors which are consider for selection of Pattern materials. 03

OR

(b) Define (1) Strength (2) Brittleness (3) Elasticit. 03

(c) Draw neat sketch of cupola furnace & lable it. 04

OR

(c) Enlist types of pattern material and explain any three. 04

(d) Enlist the Properties of moulding sand and explain any four. 04

OR

(d) Draw the gas welding techniques. 04

Q.3 (a) Give meaning of the term with sketch (1) Ingots (2) Billets (3) bloom (4) slab. 03

OR

(a) Enlist methods of Extrusion and explain tube extrusion. 03

(b) Enlist types of patterns and explain any two with figure. 03

OR

(b) List the Defects of forging Process. 03

(c) Explain the Punching operation with neat sketch. 04

OR

(c) Give Differences between Hot Working and Cold Working. 04

(d) Explain the Blank Drawing operation with neat sketch. 04

OR

(d) Give Differences between Hot Rolling and Rolling. 04

Q.4 (a) Give at list five application of welding process. 03

OR

(a) Explain Spot Welding. 03

(b) Draw the neat sketch of Metal Inert Gas (MIG) welding. 04

OR

(b) Give differences between welding and soldering. 04

(c) Write brief note on Defects in casting. 07

Q.5 (a) Give causes of welding defects. 04

(b) Write short notes on Adhesive materials. 04

(c) Draw set up of electron beam welding process. 03

(d) Enlist types of pattern allowances. 03

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