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SSC-JE ME || Theory of Machines 7

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Question 1

The angular displacement of the cam during outstroke is θ_o. If the time required for the return stroke is 1.5 sec then the time required for the follower during the outstroke will be given by.

Question 2

For the following cam profile as shown in the figure below a rotating cam with uniform angular velocity of w. what is the nature of the displacement of the follower. Where

is the angle of rotation of the cam with vertical axis.

Question 3

Cam mechanism is used in various machines to obtain complicated motions needed. Thus such mechanism are used in;

Question 4

Why offset is provided in a cam follower mechanism?

Question 5

Consider the following statements regarding the base circle of cam with roller follower:

1) It is the smallest circle centered on cam rotation axis and tangent to pitch curve.

2) It is the smallest circle centered on Cam rotation axis and tangent to the Cam surface.

3) It decides the overall size of Cam.

Which of the following statements is/are correct?

Question 6

While designing a cam, pressure angle is one of the most important parameters which is inversely proportional to

Question 7

As we know Pitch Circle is one of the characteristic dimension of Gear Design, similarly one of the characteristic dimension of CAM is_______

Question 8

The Cam and follower are used to function in a reciprocating machine. They are connected to frame to form a kinematic pair. The Cam & Follower will form a :

Question 9

In the mechanism given below, if the angular velocity of the eccentric circular disc is 1 rad/s, the angular velocity (rad/s) of the follower link for the instant shown in the figure is

Note: All dimensions are in mm.

Question 10

In a cam design, the rise motion is given by a simple harmonic motion (SHM)

where h is total rise, θ is camshaft angle, β is the total angle of the rise interval. The jerk is given by

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