Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 4th Sem Old 141902 Kinematics Of Machines Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV(OLD) ? EXAMINATION ? SUMMER 2019
Subject Code:141902 Date:20/05/2019
Subject Name: Kinematics Of Machines
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) Enlist different straight line mechanisms? Describe one type of exact straight line
motion mechanism with the help of a sketch.
07
(b) Define the following terms.(1)Link(2)Higher pair(3)Ternary Joint(4)Locked
chain(5)constrained Motion(6)Degree of freedom(7)Quaternary link.
07
Q.2 (a) Sketch and show the Davis steering mechanism and discuss their advantages and
disadvantages.
07
(b) Sketch and explain any two inversions of double slider crank chain 07
OR
(b) Explain Types of Instantaneous Centres and also state Kennedy Theorem 07
Q.3 (a) A cam is to be designed for a knife edge follower with the following data:
1. Cam lift = 40mm during 90? of cam rotation with simple harmonic
motion. 2. Dwell for the next 30 ?.3. During the next 60 ? of cam rotation, the
follower returns to its original position with uniform velocity.
4. Dwell during the remaining 180 ?.Draw the profile of the cam when the line of
stroke of the follower passes through the axis of the cam shaft. The radius of the
base circle of the cam is 40mm.
07
(b) Explain with sketches the different types of cams and followers. 07
OR
Q.3 (a) Describe the construction and working of a centrifugal clutch. 07
(b) Define the following terms as applied to cam with a neat sketch :-
(a) Base circle, (b) Pitch circle, (c) Pressure angle, and (d) Stroke of the
Follower
07
Q.4 (a) Explain any six terminology of gear tooth with neat sketch. 07
(b) Derive an expression for the length of the path of contact in a pair of meshed
spur gears.
07
OR
Q.4 (a) Differentiate between Involute and Cycloidal profile of gear tooth. 07
(b) Explain briefly the differences between simple, compound, and epicyclic gear
trains. What are the special advantages of epicyclic gear trains ?
07
Q.5 (a) Explain the working of Multi-plate clutch with neat sketch. 07
(b) Describe Klein?s construction with an example. 07
OR
Q.5 (a) State the criteria of selection of following for transmission of power:1. Belt Drive
2. Rope Drive 3. Chain Drive 4. Gear Drive
07
(b) What is undercutting in gears. Explain the interference in involute gears. How
interference can be prevented?
07
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This post was last modified on 20 February 2020