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Theory of Machine

Theory of Machine
In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to

0.6
0.4
0.2
0.8

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Theory of Machine
Which of the following would constitute a link?

Piston, piston rod and cross head
Piston, crank pin and crank shaft
Piston and piston rod
Piston rod and cross head

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Theory of Machine
In a shaper mechanism, the Coriolis component of acceleration will

Not exist
Depend on position of crank
None of these
Exist

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Theory of Machine
Tangential acceleration direction is

Opposite to angular velocity
May be any one of these
Along the angular velocity
Perpendicular to angular velocity

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Theory of Machine
An eccentric sheave pivoted at one point rotates and transmits oscillatory motion to a link whose one end is pivoted and other end is connected to it. This mechanism has

4 links
2 links
5 links
3 links

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Theory of Machine
A spring controlled governor is said to be isochronous when the controlling force

Decreases as the radius of rotation increases
Remain constant for all radii of rotation
Increases as the radius of rotation decreases
Increases as the radius of rotation increases

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