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Theory of Machine

Theory of Machine
In a rigid link OA, velocity of 'A' w.r.t. 'O' will be

At 45° to OA
Perpendicular to OA
Along AO
Parallel to OA

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Theory of Machine
The retardation of a flat faced follower when it has contact at the apex of the nose of a circular arc cam, is given by (where OQ = Distance between the centre of circular flank and centre of nose)

ω² × OQ sinθ
ω² × OQ tanθ
ω² × OQ cosθ
ω² × OQ

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Theory of Machine
The example of lower pair is

All of these
Straight line motion mechanisms
Automobile steering gear
Shaft revolving in a bearing

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Theory of Machine
If the number of links in a mechanism is equal to l, then the numbers of possible inversions are equal to

l + 1
l
l - 1
l - 2

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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 minimum length of the coupler will be

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

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Theory of Machine
Coriolis component acts

None of these
Somewhere in between above two
Perpendicular to sliding surfaces
Along sliding surfaces

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