Theory of Machine
The arrangement is called bevel gearing, when two __________ are connected by gears.

Non-intersecting and non-coplanar shafts
Intersecting and coplanar shafts
Parallel and non-coplanar shafts
Parallel and coplanar shafts

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Theory of Machine
Open pairs are those which have

Surface contact between the two elements when in motion
Point or line contact between the two elements when in motion
Elements of pairs not held together mechanically
Two elements that permit relative motion

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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 is _________ when the crank OC and connecting rod PC are at right angles to each other.

Any -ve value
Zero
Infinity
Any +ve value

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