Cam and Follower MCQ

31. The choice of displacement diagram during the rise or return of a follower of a cam-follower mechanism is based on dynamic considerations. For high-speed cam, follower will have which one of the following?

1. Cycloidal motion
2. Simple harmonic motion
3. Parabolic or uniform acceleration motion
4. Uniform motion or constant velocity motion

32. Why offset is provided for a cam follower mechanism?

1. To avoid jerk
2. To accelerate
3. To decelerate
4. To minimize side thrust

33. For a given lift of the follower in a given angular motion of the cam, the acceleration/retardation of the follower will be least when the profile of the cam during the rise portion is

1. such that the follower motion is simple harmonic
2. such that the follower motion has a constant velocity from start to end
3. a straight line, the being a tangent cam
4. such that the follower velocity increases linearly for half the rise portion and then decreases linearly for the remaining half of the rise portion

34. The factor that decides the size of the cam is

1. Base circle
2. Prime circle
3. Pitch circle
4. Pitch curve

35. For high speed engines, the cam follower should move with

1. uniform velocity
2. simple harmonic motion
3. uniform acceleration and retardation
4. cycloidal motion

36. Cam size depends upon

1. Base circle
2. Prime circle
3. Pitch circle
4. Pitch curve

37. The cam and follower without a spring forms a

1. lower pair
2. higher pair
3. self closed pair
4. forced closed pair

38. Which of the following term defines the size of the cam?

1. Base circle
2. Prime circle
3. Pitch circle
4. Pitch curve

39. A cam in which the follower reciprocates or oscillates in a plane parallel to the axis of the cam is known as

1. circular cam
2. cylindrical cam
3. tangent cam
4. reciprocating cam

40. Which of the following options is correct about the motion of the follower?

1. Uniform velocity
2. Simple harmonic motion
3. Uniform acceleration
4. All option are correct