Theory-of-machines Questions Set 12:
The mechanism forms a structure when the number of degrees of freedom (n) is equal to:
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What type of joint is observed in all four joints of a coupling rod of a locomotive?
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What is the primary function of the fuel injector in a compression ignition (CI) engine?
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The mechanism in which two are turning pairs and two are sliding pairs is called a:
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Why is an offset provided for a cam follower mechanism?
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In a Whitworth quick return motion mechanism, which link is fixed in the slider crank chain?
Solution:
A Hooke's joint, commonly known as a Universal Joint, is used to connect two non-parallel and intersecting shafts.
Solution:
The cam rotates at 360 rpm and has a minimum radius of 5 cm. If the cam lifts the follower through 3.75 cm when the cam rotates by 90 degrees in simple harmonic motion, determine the maximum velocity of the follower during descent.
Solution:
Consider a 4-bar linkage with only revolute pairs, where the lengths of the links are A, B, C, and D units.
Given that:
A < B < C < D
A + D < B + C
Which link should be fixed to make a double-crank mechanism?
Solution:
A constant velocity follower has a velocity of 60 rad/s. The lift of the cam is 100 mm, and there is no dwell between the ascent and descent of the cam. Find the velocity of the follower at the mid-stroke during descent in m/s (Angle of descent is 120 degrees).
Solution:
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