MEE 311(Theory of Machines) CBT PRACTICE

1. What type of mechanism is shown in the diagram below?

2. The condition which must be fulfilled by two gear tooth profiles to maintain a constant angular velocity ratio between them is called __________________

3. Which of these is not a type of clutch?

4. In which of the following mechanism the relative motions of the rigid bodies are in one plane or in parallel planes?

5. When large gear reductions are needed _________ gears are used.

6. The distance travelled by a point on either pitch circle of the two wheels during the period of contact of a pair of teeth is called ____________________

7. If the shortest link is fixed, what type of mechanism is obtained?

8. What type of mechanism is shown in the given diagram?

9. . The angle turned by the gear from the beginning to the end of engagement of a pair of teeth is called _____________

10. In a multi plate clutch, number of discs on the driving shaft is given by n1. True or false?

11. Which of the following clutches include shoes and spider inside the rim of the pulley

12. Which of the following mechanism is an approximately straight-line motion mechanism?

13. If the shortest link is fixed, what type of mechanism is obtained?

14. If the link next to the shortest link is fixed, what type of mechanism is obtained?

15. If the s+l=p+q, what is the type of linkage?

16. The distance by which a helix advances along the axis of the gear for one turn around is called _____________

17. __________ mechanism is a crossed four bar chain mechanism in early steam engines to guide the piston rod in a cylinder to have an approximate straight line motion.

18. In a centrifugal clutch, what is ω?

19. The contact ratio is the ratio of arc of contact to the ____________

20. What type of mechanism is shown in the diagram below?

21. Which of the following is an advantage of worm gear?

22. The locus of a point on the pitch circle from the beginning to end of engagement of two mating gears is called as ___________

23. If there are redundant constraints in the chain and it forms a statically indeterminate structure, what is the degree of freedom or the mobility of this structure?

24. In a multi plate clutch, T = 150 N-m, n = 4, µ = 0.3 and R = 0.1 m. Find the axial thrust.

25. The smaller and generally the driving gear of a pair of mated gears is called _________

26. What is the condition involved in Grashof’s law?

27. Which of the gears has the highest contact ratio?

28. Bevel gears are equivalent to rolling

29. Which of the following mechanism is an approximately straight-line motion mechanism?

30. If Grashof’s law is not satisfied, no link will make a complete revolution relative to one another. True or False?

31. What type of mechanism is shown in the diagram below?

32. If the link opposite to the shortest link is fixed, what type of mechanism is obtained?

33. What is the working depth of the gear and the pinion of the bevel gears?

34. In a multi plate clutch, the formula for T is given by ______

35. In a conical clutch, the mean radius of the bearing surface is 300 mm whereas the breadth is 20 mm. Find the inner and outer radii. The semi cone angle is 30°.

36. __________ mechanism is a crossed four bar chain mechanism in early steam engines to guide the piston rod in a cylinder to have an approximate straight line motion.

37. The ratio of angle of action to the pitch angle is called ___________

38. In a centrifugal clutch, what is ω?

39. Velocity of sliding at the pitch point = (ωp + ωg) x _____________

40. The distance measured along the circumference of the pitch circle from a point on one tooth to the same point on the adjacent tooth is called ________________

41. For a Whitworth quick return motion mechanism β = 110°. Find the ratio of time of cutting stroke to time of return stroke.