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Theory of Machine

Theory of Machine
Minimum number of teeth for involute rack and pinion arrangement for pressure angle of 20° is

10
30
20
34

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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
l - 2
l - 1
l + 1

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Theory of Machine
Instantaneous center of rotation of a link in a four bar mechanism lies on

A point obtained by intersection on extending adjoining links
Can’t occur
Right side pivot of this link
Left side pivot of this link

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Theory of Machine
When a point moves along a straight line, its acceleration will have

Coriolis component only
Tangential component only
Radial and tangential components both
Radial component only

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Theory of Machine
The train value of a gear train is

Equal to velocity ratio of a gear train
Always less than unity
Reciprocal of velocity ratio of a gear train
Always greater than unity

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Theory of Machine
Which of the following is an inversion of a single slider crank chain?

All of these
Rotary internal combustion engine
Pendulum pump
Oscillating cylinder engine

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