CAM and Follower

The size of a cam depends upon

• base circle

• pitch circle

• prime circle

• pitch curve

The cam follower generally used in automobile engines is

• knife edge follower

• flat faced follower

• spherical faced follower

• roller follower

In a radial cam, the follower moves

• in a direction perpendicular to the cam axis

• in a direction parallel to the cam axis

• in any direction irrespective of the cam axis

• along the cam axis

A radial follower is one

• that reciprocates in the guides

• that oscillates

• in which the follower translates along an axis passing through the cam centre of rotation.

• none of the mentioned

Offset is provided to a cam follower mechanism to

• minimise the side thrust

• accelerate

• avoid jerk

• none of the mentioned

For low and moderate speed engines, the cam follower should move with

• uniform velocity

• uniform acceleration and retardation

• simple harmonic motion

• None

For high speed engines, the cam follower should move with

• uniform velocity

• simple harmonic motion

• uniform acceleration and retardation

• cycloidal motion

Which of the following displacement diagrams should be chosen for better dynamic performance of a cam-follower mechanism ?

• simple hormonic motion

• parabolic motion

• cycloidal motion

• none

Angle of ascent of cam is defined as the angle

• during which the follower returns to its initial position

• of rotation of the cam for a definite displacement of the follower

• through which the cam rotates during the period in which the follower remains in highest position

• moved by the cam from the instant the follower begins to rise, till it reaches its highest position

Angle of action of cam is defined as the angle

• of rotation of the cam for a definite displacement of the follower

• through which the cam rotates during the period in which the follower remains in the highest position

• moved by the cam from the instant the follower begins to rise, till it reaches its highest position

• moved by the cam from beginning of ascent to the termination of descent