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Theory of Machine

Theory of Machine
A rigid body possesses ________degrees of freedom

Two
Four
One
Six

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Theory of Machine
A point B on a rigid link AB moves with respect to A with angular velocity ω rad/s. The radial component of the acceleration of B with respect to A, is (where vBA = Linear velocity of B with respect to A)

vBA /AB
v²BA
vBA × AB
v²BA /AB

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Theory of Machine
The number of centers in a crank driven slider crank mechanism is

6
2
4

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Theory of Machine
A universal joint is an example of

Lower pair
Rolling pair
Higher pair
Sliding pair

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Theory of Machine
The Whitworth quick return motion mechanism is formed in a slider crank chain when the

Coupler link is fixed
Smallest link is a fixed link
Slider is a fixed link
Longest link is a fixed link

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Theory of Machine
A Hartnell governor has its controlling force (Fc) given by Fc = ar + b, where r is the radius of rotation and a and b are constants. The governor becomes isochronous when

a is +ve and b is -ve
a is +ve and b = 0
a = 0 and b is +ve
a is +ve and b is also +ve

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