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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIFTH SEMESTER B.TECH DEGREE EXAMINATION, APRIL 2018
Course Code: ME301
Course Name: MECHANICS OF MACHINERY MP, PE)
Max. Marks: 100 Duration: 3 Hours
PART A
Answer any three full questions, each carries 10 marks Marks
1 Define the following terms:
Kinematic link ii) Kinematic pair iii) Kinematic chain iv) Mechanism

Classify kinematic pair with examples.
2 State and prove Kennedy's theorem.
A slider crank mechanism has lengths of the crank and the connecting rod equal to
200 mm and 200 mm respectively. Locate all the instantaneous centres of the
mechanism for the position of the crank when it has turned through 30o from the
inner dead centre. Also find the velocity of the slider and the angular velocity of
the connecting rod if the crank rotates at 40 rad/sec.

3 For the configuration of a slider mechanism in the Figure shown below. Calculate:
The acceleration of the slider at B ii) The acceleration of point E
iii) The angular acceleration of link AB. OA rotates at 20 rad/s counter-clockwise.

4 How are cams and followers classified? Describe in detail.
PART B
Answer any three full questions, each carries 10 marks
5 Draw the profile of a cam that gives a lift of 25 mm to a rod carrying a 5 mm
diameter roller. The axis of the roller passes through the centre of the cam. The
least radius of the cam is 20 mm. The rod is to be lifted with cycloidal motion for
120o of cam rotation and is followed by dwell period of 60o. The follower is
dropped suddenly at an angle of 90o of cam rotation with SHM motion followed by
dwell. Determine the maximum velocity and maximum acceleration during the
outstroke and return stroke. The camis rotated at 1200 rpm clockwise direction.

6 In a symmetrical tangent cam operating a roller follower, the least radius of the
cam is 30 mm and roller radius is 17.5 mm. The angle of ascent is 75o, lift is 17.5
mm and the speed of the cam is 600 rpm. Calculate:

A
Principal dimensions of the cam
ii)The acceleration of the follower at the beginning of the lift, where straight flank
merges into the circular nose and at the apex of the circular nose. Assume that,
there is no dwell between ascent and descent.
7 Two 20o gears have a module pitch of 5mm. The number of teeth on the pinion
20 and the gear ratio is 2. If the pitch line speed is 1.2 assuming addendum as
standard and equal to one module
The angle turned through by pinion when on
ii) The maximum velocity of sliding
8 What is meant by interference
methods to avoid interference of
Answer
9 What is a gear train?
Find the angular velocity of gear 8 if the angular velocity of gear 2 is 800 rpm in
the direction shown below:
10 In an epicyclic gear train, an arm carries two gears A and B having 36 and 45 teeth
respectively. If the arm rotates at 150 rpm in the anticlockwise direction about the
centre of the gear A which is fixed, determine the speed of gear B. If the
instead of being fixed, makes 300 rpm in the clockwise direction, what will be the
speed of gear
11 Explain the different tasks in kinematic synthesis problems.
Explain the different types
12 Explain what do you mean by structural error?
Explain the two-position
13 Derive Freudenstein's equation for kinematic synthesis
14 Synthesize a function generator to solve the equation over the range 1
using three precision positions.
position for the input link and 240
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cam.
he ere module. Find:
one pair of teeth is in mesh and
he and undercutting in involute gears?
gears?
PART C
any four full questions, each carries 10 marks
hat Explain the different types of gear trains.
of synthesis.
synthesis of a slider crank mechanism.
reudenstein's Assume 300 starting and 1200
2400 starting and 3300 finishing for the output link.

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