MEE 311(Theory of Machines) CBT PRACTICE

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

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

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

4. 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?

5. __________ 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.

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

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

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

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

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

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

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

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

14. In a centrifugal clutch, what is ω?

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

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

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

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

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

20. __________ 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.

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

22. In a centrifugal clutch, what is ω?

23. 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°.

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

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

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

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

28. 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 ________________

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

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

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

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

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

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

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

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

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

38. 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 ____________________

39. Bevel gears are equivalent to rolling

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

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