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Theory of Machine

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 + 1
l - 2
l

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Theory of Machine
Cross head and guides form a

Turning pair
Higher pair
Sliding pair
Lower pair

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Theory of Machine
Shaft revolving in a bearing is the following type of pair

Cylindrical pair
Higher pair
Spherical pair
Lower pair

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Theory of Machine
A combination of kinematic pairs, joined in such a way that the relative motion between the links is completely constrained, is called a

Structure
Inversion
Mechanism
Kinematic chain

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Theory of Machine
Balancing of rotating and reciprocating parts of an engine is necessary when it runs at

Any one of these
Slow speed
Moderate speed
Highs peed

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Theory of Machine
The velocity of a particle moving with simple harmonic motion, at any instant is given by (where ω = Displacement of the particle from mean position)

ω √(r² - x²)
ω √(x² - r²)
ω² √(x² - r²)
ω² √(r² - x²)

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