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GATE 2019: Theory of Machine Quiz 2
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Question 1
Given figure shows a quick return mechanism. The crank OA rotates clockwise uniformly. OA = 2 cm, OO’ = 4 cm. The ratio of time for forward motion to that for return motion is_________.
Question 2
Two links have angular velocity of 20 rad/s and 15 rad/s both in opposite directions. If the radius of the pin at O is 10mm, O is point where two links are connected, determine the rubbing velocity at the joint____?
Question 3
A slider-crank mechanism with crank radius 60 mm and connecting rod length 240 mm is shown in figure. The crank is rotating with a uniform angular speed of 10 rad/s, counter clockwise. For the given configuration, the speed (in m/s) of the slider is____
Question 4
The figure shows a slider moving inwards on a rod with a velocity of 5 m/s when its distance from point O is 1 m. At this instant, velocity of slider is increasing at the rate of 10 m/s2. Rod has an angular velocity of 5 rad/s counter clockwise. The angle which the resultant absolute acceleration of slider makes with the line OR is
Question 5
A Rigid link PQ of length 2 m rotates about the pinned end Q with a constant angular acceleration of 12 rad/s2. When the angular velocity of the link is 4 rad/s, the magnitude of the resultant acceleration (in m/s2) of the end P is _________.
Question 6
A rigid link PQ is 2 m long and oriented at to the horizontal as shown in the figure. The magnitude and direction of velocity, and the direction of velocity, are given. The magnitude of (in m/s) at this instant is
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