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ESE ME: Theory of Machines & Vibrations Champion Quiz 1

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Question 1

The lengths of the links of a 4-bar linkage with revolute pairs only are p,q,r and s units. Given that p < q < r < s. which of these links should be the fixed one, for obtaining a ‘double crank’ mechanism?

Question 2

Which of the following statements is INCORRECT?

Question 3

In a single degree-of-freedom, 4-link, revolute jointed Grashoff mechanism, ‘l’ is the longest link, ‘s’ is the shortest link and p, q are the two remaining links. These links may be in any order.
(a) If shortest link is fixed then the mechanism will be crank-crank type
(b) When link next to shortest link is being fixed, the mechanism will be crank-rocker type.
(c) When link opposite to shortest is fixed, mechanism will be rocker-rocker type.

Question 4

Consider the following statements:

Assertion (A): Link A experiences Coriolis acceleration relative to the fixed link.
Reason (R): Slotted link A is rotating with angular velocity w and Block B slides in the slot of A.

Question 5

In the figure given above, the link 2 rotates at an angular velocity of 2rad/s. what is the magnitude of Coriolis acceleration experienced by the link 4?

Question 6

Which of the following is a lower pair __________?

Question 7

In a certain slides-crank mechanism, lengths of crank aid commenting rod are equal. If the crank rotates with a uniform angular speed of 14 rad/s and the crank length is 300 mm, the maximum acceleration of the slider (in m/s²) is _______

Question 8

A pantograph is a device that reproduces a displacement __________.

Question 9

Assertion (A) : the cam in contact with a follower is a case of complete constraint.
Reason (R) : The pair, cam and follower, by itself does not guarantee continuity of contact all the time.

Question 10

The figure as shown below is a rigid body undergoing planar motion. The absolute tangential accelerations of the points R and S on the body are 150 mm/

and 300 mm/

respectively in the directions shown. What is the angular acceleration of the rigid body?

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ESE & GATE ME Theory of Machines & Vibrations

Aug 21ESE & GATE ME