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Reg No.: Name:

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

Course Code: ME301
Course Name: MECHANICS OF MACHINERY

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any three full questions, each carries 10 marks. Marks
1 What is meant by inversion? Explain with neat figures, the different inversions (10)
of four bar mechanism.
2 Explain with neat sketch the Geneva mechanism. (10)
3 Find out the acceleration of the slider D and the angular acceleration of link CD (10)

for the engine mechanism shown in the Figure. The crank OA rotates uniformly
at 180 rpm in clockwise direction. The various lengths are: 0൧5150 mm;
AB=450 mm; PB=240 mm; BC=210 mm; CD=660 mm.

All dimensions in mm.

Derive the relation for displacement, velocity and acceleration of a cam (10)
follower with cycloidal motion.
PART 8

Answer any three full questions, each carries 10 marks.

Draw the cam profile for the following conditions: Follower type = roller (10 ) follower,
offset to the right by 5 mm; lift = 30 mm; base circle radius = 25 mm; roller radius =
5mm; out stroke with SHM, for 120° cam rotation: dwell for 60° cam rotation; return
stroke during 120° cam rotation; first half return stroke with uniform velocity and second
half with parabolic motion; dwell for the remaining period.

6 What is a tangent cam? Find the expressions for the velocity and acceleration of (10) a roller
follower for such a cam.

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