S.E. Mechnical S/W (Semester – I), 2011 Question Paper,University Of Pune Question Paper,PRODUCTION ENGINEERING – I

University Of Pune Question Paper
S.E. Mechnical S/W (Semester – I) Examination, 2011
PRODUCTION ENGINEERING – I (2003 Course)
Time : 3 Hours Max. Marks : 100
 Instructions: 1) Answer Que. No. 1 or Que. No. 2, Que. No. 3 or Que. No. 4
Que. No. 5 or Que. No. 6 from Section-I and Que. No. 7 or
Que. No. 8, Que. No. 9 or Que. No. 10, Que. No. 11 or Que.
No. 12 from Section-II.
2) Answers to the two Sections should be written in separate
books.
3) Neat diagrams must be drawn wherever necessary.
4) Black figures to the right indicate full marks.
5) Assume suitable data, if necessary.
6) Use of logarithmic tables, slide rule, Mollier charts, electronic
pocket calculator and steam tables is allowed.
SECTION – I
Unit No. 01
1. a) What is pattern ? Describe different allowances provided on pattern in short. 8
b) Explain the following with neat sketch :
i) Sand Slingers ii) Split Pattern. 6
c) What do you understand from the term “Gating System” ? What are the main
requirements expected of an ideal gating system ? 4
OR
2. a) Describe the Shell Moulding process with neat sketch. Also state its
advantages, limitations and applications. 8
b) Explain in short following characteristics of moulding sand in short
i) Refractoriness ii) Permeability. 6
c) Compare permanent mould casting method to sand casting. 4
Unit No. 02
3. a) Describe the process of cold spinning with sketch stating its advantages and
specific uses. 8
b) Explain the following press operation in short;
i) Notching
ii) Shaving
iii) Trimming
iv) Blanking. 8
OR
4. a) Explain with neat sketches the following forging operations :
i) Upsetting
ii) Drawing Out
iii) Fullering
iv) Bending. 8
b) How a press size is designated ? What are the factors that influence the press
size ? 4
c) What are common forging defects ? State their causes. 4
Unit No. 03
5. a) Explain ‘Thermit Welding’ with neat sketch. What are its main advantages ? 8
b) Differentiate between soldering and brazing. 4
c) State different types of adhesives and state their advantages and limitations. 4
OR
6. a) Describe with figure the process of submerged arc welding stating its
advantages and limitations. 8
b) Describe with figure the plasma welding, stating its advantages and
disadvantages. 8
SECTION – II
Unit No. 04
7. a) List out various taper turning methods on lathe and explain the taper turning
attachment with sketch. 8
b) Sketch and explain the construction and working of ‘Lathe Tailstock’. 8
OR
8. a) Why are back gears used ? Describe in detail with sketch the method of using
them. 8
b) State the functions of the following in lathe
i) Half centres ii) Follower rest
iii) Chasing dial iv) Mandrel. 8
Unit No. 05
9. a) Classify the drills used in drilling machine. Write the advantages of using
spiral flutes drill instead of straight flutes. 8
b) What are the different operations that can be performed on drilling machine ?
Explain with the help of neat sketch. 6
c) Distinguish between Up milling and Down milling process. 4
OR
10. a) Index 69 divisions by compound indexing method.
The hole circle available are
Plate I 15, 16, 17, 18, 19, 20
Plate II 21, 23, 27, 29, 31, 33
Plate III 37, 39, 41, 43, 47, 49 6
[3962] – 274 -4-
b) Explain drill spindle assembly with neat sketch. 8
c) Sketch and describe in short following milling cutter. 4
i) Plain milling cutter
ii) End mill.
Unit No. 06
11. a) State different types of bonds used in the manufacture of abrasive wheel.
Describe any one in detail stating its advantages and disadvantages. 8
b) What is centreless grinding ? Draw a working setup of centreless external
grinding process and explain in short. 8
OR
12. a) Explain with neat sketch the mounting of grinding wheel. 8
b) What is super finishing ? How does it differ from lapping and honing ? 4
c) Why ‘trueing and dressing’ are necessary in grinding wheel ? 4
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