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Theory of Machine

Theory of Machine
A ball and a socket forms a

Turning pair
Screw pair
Rolling pair
Spherical pair

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Theory of Machine
Under logarithmic decrement, the amplitude of successive vibrations are

In logarithmic progression
In geometric progression
In arithmetic progression
Constant

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Theory of Machine
The cam follower generally used in aircraft engines is

Spherical faced follower
Flat faced follower
Knife edge follower
Roller follower

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Theory of Machine
In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The distance between fixed pivots of crank and followers is

95 mm
45 mm
Slightly less than 95 mm
Slightly more than 95 mm

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Theory of Machine
A Hartnell governor is a

Spring loaded governor
Inertia governor
Dead weight governor
Pendulum type governor

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Theory of Machine
The ratio of height of Porter governor (when length of arms and links are equal) to the height of Watt's governor is (where m = Mass of the ball, and M = Mass on the sleeve)

M/(m + M)
(m + M)/M
m/(m + M)
(m + M)/m

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