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Reg No.: Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIFTH SEMESTER B.TECH DEGREE EXAMINATION, APRIL 2018

Course Code: ME301
Course Name: MECHANICS OF MACHINERY (ME, MP, PE)

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any three full questions, each carries 10 marks Marks
1 a) Define the following terms: (4)
i) Kinematic link 11) Kinematic pair 111) Kinematic chain 1४) Mechanism
b) Classify kinematic pair with examples. (6)
2 a) State and prove Kennedy’s theorem. (6) b) A slider crank mechanism has lengths of the

crank and the connecting rod equal to (4) 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 30° 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:
(10)
i) 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. (10)

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 a5 mm (10) 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 120° of cam rotation and is
followed by dwell period of 60°. The follower is dropped suddenly at an angle of 90° 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 (10) cam is
30 mm and roller radius is 17.5 mm. The angle of ascent is 75°, lift is 17.5 mm and the
speed of the cam is 600 rpm. Calculate:

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