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Theory of Machine

Theory of Machine
What is the number of instantaneous centers for an eight link mechanism?

15
8
30
28

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Theory of Machine
In under damped vibrating system, if x₁ and x₂ are the successive values of the amplitude on the same side of the mean position, then the logarithmic decrement is equal to

log(x₁/x₂)
loge(x₁/x₂)
log(x₁.x₂)
x₁/x₂

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Theory of Machine
The factor which affects the critical speed of a shaft is

Eccentricity
Diameter of disc
Span of shaft
All of the listed here

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Theory of Machine
When the particles of a body moves perpendicular to its axis, then the body is said to have

None of these
Transverse vibration
Torsional vibration
Longitudinal vibration

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

ω(R - r₁) sinθ
ω(R - r₁) cosθ
ωr₁ sinθ
ωR cosθ

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Theory of Machine
In higher pair, the relative motion is

Purely turning
Purely rotary
Purely sliding
Combination of sliding and turning

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