STUPIDSID
Answer any one question from Q1 and Q2
1 (a)
Discuss various types of patterns with suitable sketches.
8 M
1 (b)
Describe the pattern making allowances. What is the use of
contraction rule.
8 M
2 (a)
Describe investment casting process with neat sketch. Also state its advantages, limitations and applications.
8 M
2 (b)
Explain hot chamber die casting with suitable sketch.
8 M
Answer any one question from Q3 and Q4
3 (a)
Explain hot and cold working process.
4 M
3 (b)
Explain working principle of forward and backward extrusion process.
4 M
3 (c)
Explain rolling operation and various types of rolling mills.
8 M
4 (a)
Explain:
(i) Metal Spinning
(ii) Tube Drawing.
(i) Metal Spinning
(ii) Tube Drawing.
8 M
4 (b)
Sketch and explain the working of universal rolling mill and planetary rolling mill.
8 M
Answer any one question from Q5 and Q6
5 (a)
Describe the process Submerge Arc Welding stating its advantages and limitations.
8 M
5 (b)
Differentiate between: (i) TIG welding and MIG welding
(ii) Soldering and Brazing.
(ii) Soldering and Brazing.
8 M
6 (a)
Explain principle of resistance welding and its application.
6 M
6 (b)
Describe various types of adhesive and their applications.
6 M
6 (c)
Differentiate between spot and seam welding.
4 M
Answer any one question from Q7 and Q8
7 (a)
What are the various types of rake angle and its effect on orthogonal cutting operation
6 M
7 (b)
List out the various operations performed on lathe machine.
Explain any one with neat sketch.
8 M
7 (c)
Write down purpose of the following lathe parts:
(i) Half nut
(ii) Tail-stock
(i) Half nut
(ii) Tail-stock
4 M
8 (a)
Define and state the importance of the speed, feed and depth of cut in cutting operation.
9 M
8 (b)
Calculate the machine time required to reduce 60 mm diameter shaft to 50 mm diameter for a length of 1500 mm with depth of cut of 2 mm for rough cut and 1 mm for finish cut. Given:
i) Cutting speed: 30 m/min
(ii) Feed: 0.5 mm/rev
(iii) Approach length: 5 mm
(iv) Over run length: 5 mm
(v) No. of Passes: 3 (2 rough cut plus 1 finish cut).
i) Cutting speed: 30 m/min
(ii) Feed: 0.5 mm/rev
(iii) Approach length: 5 mm
(iv) Over run length: 5 mm
(v) No. of Passes: 3 (2 rough cut plus 1 finish cut).
9 M
Answer any one question from Q9 and Q10
9 (a)
Differentiate between up-milling and down-milling.
6 M
9 (b)
It is required to divide the periphery of a job into 28 equal divisions. Find the indexing arrangement.
4 M
9 (c)
List out the various operations carried out on milling machine. Explain any two with neat sketch.
8 M
10 (a)
Explain with sketch the geometry of plain milling cutter.
8 M
10 (b)
Explain the working of universal dividing head.
10 M
Answer any one question from Q11 and Q12
11 (a)
The following letters are printed on a grinding wheel 'W-C-80-T-9-S-O'. Explain the meaning of each letter mentioned in the above specification of grinding wheel.
6 M
11 (b)
Explain the factors in the selection of grinding wheel.
6 M
11 (c)
Differentiate between Honing and Lapping.
4 M
Write short notes on:
12 (a)
Super finishing.
4 M
12 (b)
Buffing and Polishing.
4 M
12 (c)
Tool and cutter grinder.
4 M
12 (d)
Cylindrical grinder.
4 M
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