Download GTU B.Tech 2020 Winter 5th Sem 3151912 Manufacturing Technology Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 5th Sem 3151912 Manufacturing Technology Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?V (NEW) EXAMINATION ? WINTER 2020
Subject Code:3151912 Date:01/02/2021
Subject Name:Manufacturing Technology
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Define the following terms as used in sand mould casting
03
1. Core
2. Core-Prints
3. Sprue
(b) State the eight examples of products produced by foundry
04
technology.
(c) Explain various types of pattern allowances with a neat sketch.
07
Q.2 (a) Enlist the various type of patterns used in the casting process.
03
(b) Differentiate between Pressure die casting and Permanent mould
04
casting.
(c) Describe the Shell mould casting process in terms of steps
07
involved, its advantages and disadvantages with the help of a neat
sketch.
Q.3 (a) State the purpose of coating on an arc welding electrode.
03
(b) Sketch the four types of basic welding joints used in welding.
04
(c) Discuss the TIG welding process setup with the help of a neat
07
sketch also enlist advantages, disadvantages, and applications.
Q.4 (a) Two steel plates each 1 mm thick are spot welded at a current
03
5000 A. The current flow time is 0.1 s. Calculate the heat generated
in the weld zone. The effective resistance in the operation is 200 ?.
(b) Discuss the benefits of the use of inert gas in the TIG welding
04
process.
(c) Sketch the three types of flames used in the oxy-acetylene
07
welding process. Give the uses of each.
Q.5 (a) Define the following terms
03
1. Blooms
2. Billets
3. Slabs
(b) Compare the forged parts and cast parts in terms of grain size,
04
directional properties, defects, and mechanical properties.
(c) Distinguish between wire drawing and tube drawing with neat
07
sketches.
Q.6 (a) Define the following terms:
03
1. Forward slip
2. Backward slip
3. Neutral point
(b) For the rolling process, Derive the equation for the length of
04
deformation zone l =
(c) Differentiate between Hot and Cold working processes.
07
Q.7 (a) State the advantages of various properties of plastic that ease
03
various plastic manufacturing processes.
(b) Define additives, Explain the function of plasticizers, catalysts,
04
and initiators.

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(c) Sketch and explain the injection moulding process.
07
Q.8 (a) State the significance of the superfinishing process.
03
(b) With the help of a neat diagram explain the superfinishing
04
process.
(c) Discuss the factors that need to be considered for selecting the
07
manufacturing processes.

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