MEE 311(Theory of Machines) CBT PRACTICE

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

2. 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 ________________

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

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

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

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

7. __________ 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.

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

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

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

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

12. 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 ____________________

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

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

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

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

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

18. Bevel gears are equivalent to rolling

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

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

21. In a centrifugal clutch, what is ω?

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

23. In a centrifugal clutch, what is ω?

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

25. __________ 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.

26. 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?

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

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

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

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

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

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

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

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

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

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

37. 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°.

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

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

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

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