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SSC JE 2019 - 20 Theory of Machine Part 9

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Question 1

In free vibration if a spring having stiffness (s), is divided by 2:3 ratio. Then stiffness for each part respectively

Question 2

Maximum efficiency of worm gear is given by:

Question 3

For the kinematic chain as shown in the figure, the degree of freedom will be:

Question 4

A four-bar linkage is shown in the figure. The length of RS is twice as that of PQ. If the angular velocity of RS is given as shown, what will be the angular velocity of PQ?

Question 5

A bike is moving on a curved flat road of radius 200 m with a speed of 25 m/s. The combined moment of inertia of the rotating masses is 16 kg-m2. Consider rotating masses of the engine have an angular speed of 50 rad/s in clockwise direction when viewed from the front of the bike. Find the magnitude of the gyroscopic moment ________.

Question 6

Which of the following is the higher pair?

Question 7

A mass of 10kg is attached between two spring having stiffness  15kN/m & 10kN/m respectively.The frequency of the system is (in Hertz)

Question 8

The number of links and instantaneous centres in a hart’s mechanism are

Question 9

If a more stiff spring is used in Hartnell governor, then the governor will be ____.

Question 10

For SHM motion of cam & follower, the maximum velocity of the follower is, where , h= rise of follower, = angle turned by crank, ф= crank rotation for maximum follower displacement.
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