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Theory of Machine

Theory of Machine
In its simplest form, a cam mechanism consists of following number of links

1
4
2
3

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Theory of Machine
When the crank is at the inner dead center, in a reciprocating steam engine, then the acceleration of the piston will be

ω²r. n/(n + 1)
ω²r. (n + 1)/n
ω²r. (n - 1)/n
ω²r. n/(n - 1)

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Theory of Machine
To connect two parallel and coplanar shafts the following type of gearing is used

None of the listed here
Spur gear
Bevel gear
Spiral gear

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Theory of Machine
If there are L number of links in a mechanism, then number of possible inversions is equal to

L - 1
L
L + 1
L + 2

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Theory of Machine
The condition for correct steering of a Davis steering gear is (where α = Angle of inclination of the links to the vertical)

tanα = c/2b
cotα = c/2b
sinα = b/c
cosα = c/b

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Theory of Machine
The cam and follower is an example of

Sliding pair
Rolling pair
Higher pair
Lower pair

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