Download GTU BE/B.Tech 2019 Winter 8th Sem Old 181903 Production Technology Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 8th Sem Old 181903 Production Technology Previous Question Paper

1

Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VIII (Old) EXAMINATION ? WINTER 2019
Subject Code: 181903 Date: 25/11/2019

Subject Name: Production Technology
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.
Q.1 (a) Define Non-conventional machining? Why do we need these processes? Give
classification of the Non conventional processes?
07
(b) Draw neat sketch of single point cutting tool indicating its complete geometry. 07
Q.2 (a) Draw Merchant?s force diagram. Derive the equations for frictional force,
normal reaction, shear force and normal force.
07
(b) In orthogonal cutting, the feed of tool is 1.25 mm/rev and chip thickness after
cutting is 2 mm. The tool bit has a rake angle of 10?. If shear strength = 600
N/mm
2
, Width of cut = 10 mm, Cutting speed = 30 m/min, Co-efficient of
friction = 0.9, Determine the (1) Chip thickness ratio (2) Shear angle (3) Shear
force (4) Friction angle (5) Cutting force and (6) Horse power at cutting tool.
07
OR
(b) The following equation for tool life is given for a turning operation,
V T
0.13
f
0.77
d
0.37
= C
A 60 min tool life was obtained while cutting at V = 30 m/min, f = 0.3 mm/rev
and d = 2.5mm. Determine the changes in tool-life if the cutting speed, feed and
depth of cut are increased by 20% individually and also taken together.
07
Q.3 (a) Enlist various thread manufacturing processes? Explain with neat sketch. 07
(b) Compare gear Hobbing and gear Shaping processes with neat diagrams. 07
OR
Q.3 (a) Differentiate between Jigs and Fixture. Enlist different types of clamping
devices. Explain any two with neat sketches.
07
(b) List various principles of location and explain 3-2-1 Principal of Location with
neat sketches.
07
Q.4 (a) Enlist methods to measure cutting temperature and explain any two. 07
(b) Explain various machine tool structures, based on rigidity. 07

OR
Q.4 (a) Explain significance of center of pressure in design of press tools. How is it
calculated?
07
(b) Describe the common bending operations performed on presses. 07
Q.5 (a) What are guide-ways? What are the principal requirements of them? Enlist
various types of guide ways used in machine tools. Explain any two in detail.
07
(b) What is difference between a Capstan & Turret lathe? Describe in brief with the
help of suitable sketch.
07
OR

Q.5 (a) Explain working principle of EDM. What are main process parameters? State
advantages, disadvantages and applications of EDM.
07
(b) Explain principle of Ultrasonic machining with help of neat diagram. State its
advantages and application.
07

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