Cam and Follower MCQ

41. A circle drawn with centre as the cam centre and radius equal to the distance between the cam centre and the point on the pitch curve at which the pressure angle is maximum, is called

1. Base circle
2. Pitch circle
3. Prime circle
4. None of these

42. What does the term jump signifies in cam and follower?

1. Follower looses contact with cam surface when follower rotates beyond a particular speed due to gravitational forces
2. Follower looses contact with cam surface when follower rotates beyond a particular speed due to inertial forces
3. Follower gain contact with cam surface when cam rotates beyond a particular speed due to gravitational forces
4. Follower looses contact with cam surface when cam rotates beyond a particular speed due to inertial forces

43. For a Roller Follower the trace point is

1. at the centre point of cam
2. at the cam axis
3. at the roller diameter
4. at the centre point of roller

44. Which of the following cam follower has the highest wear rate?

1. Knife edge follower
2. Roller follower
3. Flat face follower
4. Spherical face follower

45. For a roller follower, pitch curve and cam surface are

1. identical
2. separated by the radius of the roller
3. separated by the diameter of the roller
4. separated by one and half times the radius of the roller

46. Choose the INCORRECT statement about Cam and Follower mechanism.

1. Cams can provide unusual and irregular motions that may be impossible with other types of mechanisms
2. Cam makes a higher kinematic pair with follower
3. The Cams are usually rotated at uniform speed by a shaft, but the follower motion is predetermined and will be according to the shape of the cam
4. Manufacturing of Cams is cheap, and Cams don’t have a wear effect

47. During the dwell period of the cam, the follower

1. remains at rest
2. moves in a straight line
3. moves with uniform speed
4. does simple harmonic motion

48. In radial cams the angle between the direction of motion of follower to the normal to the pitch curve is called

1. Cam angle
2. Critical angle
3. Pressure angle
4. None of the above

49. A cam-and-follower system with the follower having a constant velocity is not suitable in practice because

1. The cam rotates with a uniform angular velocity
2. The follower moves with constant velocity
3. Inertial forces are large at the beginning as well as at the end of follower motion

Which of the above statements is/are correct?

1. i only
2. ii only
3. iii only
4. i, ii and iii

50. A radial follower is one which

1. reciprocates in the guides
2. oscillates
3. translates along an axis passing through the cam centre of rotation
4. none of these