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DIPLOMA ENGINEERING – SEMESTER – III • EXAMINATION – SUMMER 16
Subject Code: 3331901 Date:12.05.2016
Subject Name: Manufacturing Engineering - I
Time: 02:30 PM TO 05:00 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 manufacturing process.
2. Explain piercing process.
3. Define Hardness.
4. Define cold working process.
5. List main five step of casting..
6. List types of foundary.
7. Classify moulding sand.
8. Define welding process.
9. Listout welding defects.
10. Listout the name of destructive and non- destructive welding test.
Q.2 (a) List factor affecting the re-crystalisation temp. 03
OR
(a) State the effect of residual stress on manufacturing process. 03
(b) Give diffrence between Hot and Cold rolling process. 03
OR
(b) Explain meaning of (i) ingot (ii) bloom (iii) billet (iv) slab. 03
(c) Explain bulging operation with figure. 04
OR
(c) Explain curling operation with figure. 04
(d) Give different types of classification of types of press. 04
OR
(d) Explain any four press operations. 04
Q.3 (a) List the types of pattern and explain any one. 03
OR
(a) List advantages and limitation of casting processes. 03
(b) Explain pattern allowances. 03
OR
(b) List the types of core and explain any one. 03
(c) Explain properties of moulding sand. 04
OR
(c) Explain casting defects. 04
(d) Explain investment casting process. 04
OR
(d) Explain with neat sketch cupola furnace. 04
Q.4 (a) Differntiate between soldering ,brazing and welding. 03
OR
(a) Discribe diffrent gas flame with sketch. 03
(b) State the name of equipment used in arc welding with its function. 04
OR
(c) Explain submurged arc welding with figure. 07
Q.5 (a) Give advantage and disadvantage and application of adhesive material. 04
(b) Write short note on Fastners. 04
(c) Write colour code of pattern as per I.S. 03
(d) Write safety precautions in welding shop. 03
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