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Theory of Machine

Theory of Machine
The critical speed of a shaft depends upon its

Mass and stiffness
Mass
Stiffness
Stiffness and eccentricity

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Theory of Machine
In a shaper mechanism, the Coriolis component of acceleration will

Depend on position of crank
Not exist
Exist
None of these

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Theory of Machine
Throw of a cam is the maximum distance of the follower from

Base circle
Pitch circle
Prime circle
Root circle

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Theory of Machine
A disturbing mass m₁ attached to the rotating shaft may be balanced by a single mass m₂ attached in the same plane of rotation as that of m₁, such that (where r₁ and r₂ are the radii of rotation of m₁ and m₂ respectively)

m₁ r₂ = m₂ r₁
m₁ r₁ = m₂ r₂
m₁ m₂ = r₁ r₂
None of these

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Theory of Machine
The acceleration of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by

ω² (R - r₁) sinθ
ω² (R - r₁) cosθ
ω² r₁ sinθ
ω² R cosθ

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Theory of Machine
The main disadvantage of the sliding pair is that it is

Difficult to manufacture
Wears rapidly
Both (A) and (B) above
Bulky

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