Name of the University : Mahatma Gandhi University
Department : Production Engineering
Degree : B.Tech
Subject Code/Name : PE 010 601/Kinematics of Machinery
Sem : VI
Website : mgu.ac.in
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/mgu.ac.in/5150-PE%20601.doc
MGU Kinematics of Machinery Question Paper
B-Tech Degree examination :
Sixth semester :
Branch: Production Engineering
PE 010 601 : Kinematics of Machinery.
Time: Three Hours
Maximum :100marks
Answer all questions :
Part A
Each question carries 3 marks :
1. List out the inversions of single slider crank chain
2. What are precision points? Give brief explanation
3. Explain Helical gear
4. Explain undercut in cams
5. Explain classification of kinematic pairs (3×5=15)
Part B
Each question carries 5marks :
6. What is condition for correct steering
7. Explain law of gearing
8. Explain Gruebler’s criterion for degrees of freedom of plane mechanism
9. Discuss significance of pressure angle of a cam
10. Explain synthesis of four link mechanism (5×5=25)
Part C
Each question carries 12 marks :
11. Explain in detail Davis Steering gear.
What are draw backs of Davis steering gear. (12marks)
Or
12.Explain with neat sketch, any two straight line generation mechanisms.
13. In the slider crank mechanism, the crank OA rotates with a uniform speed of 60rpm. Determine the linear velocity of the slider ‘B’. Determine also the linear velocity of point Q located at a distance of 5cm on the connecting rod extended. (12marks)
Or
14. a) Explain Corioli’s component of Accelaration.
b) Explain how components of velocity and acceleration are determined in a four link mechanism with the help of sketch. (12marks)
15. Design a four- link mechanism to coordinate three positions of the input and the output links for the following angular displacements ? 12 =60 ?13=90 f12=30 f13= 50. (12 marks)
Or
16. Design a four –link mechanism if the motions of input and output links are governed by a function Y = X1.5 and X varies from 1 to 4. Assume ? to vary from 300 to 1200 and f from 600 to 1300 . The length of fixed link is 30 mm. Use Chebychev spacing of accuracy points. (12 marks)
17. Draw a cam profile to drive an oscillating roller follower to the specifications
Given below :
a) Follower to move outwards through an angular displacement of 200 rotation of the cam.
b) Follower to return to its initial position during next 1200 rotation of the cam.
c) Follower to dwell during the next 1200 of cam rotation. The distance between pivot centre and roller centre is equal to 120mm;
The distance between pivot centre and cam axis equals 130mm; minimum radius of cam is 40mm; radius of roller is 10mm; inward and outward strokes takes place with simple harmonic motion. (12 marks)
Or
18. Derive an expression for displacement, maximum velocity and acceleration when a cam follower executes SHM. Plot displacement, velocity and acceleration versus cam angle diagrams. (12 marks)
19. A pinion having 25 teeth drives a gear having 60 teeth. The teeth profile is involute with pressure angle of 200 , module 8mm and addendum equal to 1 module. Determine (1) length of the path of contact (11) arc of contact (111) contact ratio. (12 marks)
20. Two 200 involute spur gears having a velocity ratio of 2.5 mesh externally. The module is 4mm and the addendum is equal to 1.23 module. The pinion rotates at 150 rpm . Find the
(1) Minimum number of teeth on each wheel to avoid interference.
(11) Number of pairs of teeth in contact. (12 marks)
Syllabus
PE010 601 : Kinematics of Machinery
Module I : (14hours)
Classification of mechanisms – Basic kinematic concepts and definitions – Degree of freedom, Mobility – Kutzbach criterion, Gruebler’s criterion – Grashof’s Law –Kinematic inversions of four-bar chain, slider crank chains and double slider crank chains
Limit positions –Mechanical advantage – Transmission Angle -Coupler curves – Description of some common Mechanisms – Quick return mechanisms, Straight line generators, Dwell Mechanisms, Ratchets and Escapements, Universal Joint, steering mechanisms
Module II : (12hours)
Displacement, velocity and acceleration analysis of simple mechanisms – Graphical method – Velocity and acceleration polygons – Velocity analysis using instantaneous centers – Kennedy’s theorem, kinematic analysis by complex algebra methods
Vector approach – Computer applications in the kinematic analysis of simple mechanisms – Coincident points – Coriolis component of Acceleration.