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Theory of Machine

Theory of Machine
A cam with a roller follower would constitute following type of pair

Higher pair
Lower pair
Close pair
Open pair

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Theory of Machine
The swaying couple is maximum or minimum when the angle of inclination of the crank to the line of stroke (θ) is equal to

45° and 225°
90° and 180°
180° and 270°
270° and 360°

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Theory of Machine
The type of coupling used to join two shafts whose axes are neither in same straight line nor parallel, but intersect is

Universal coupling
Oldham's coupling
Flexible coupling
Chain coupling

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Theory of Machine
The secondary unbalanced force is __________ the primary unbalanced force.

n times
Two-third
1/n times
One-half

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Theory of Machine
The example of spherical pair is

Lead screw of a lathe
Ball and socket joint
Ball bearing and roller bearing
Bolt and nut

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Theory of Machine
In the below figure, PC is the connecting rod and OC is the crank making an angle θ with the line of stroke PO and rotates with uniform angular velocity at ω rad/s. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral CQNO. The acceleration of the piston P with respect to the crank-pin C is given by

ω² × CN
ω² × NO
ω² × CO
ω² × QN

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