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Theory of Machine

Theory of Machine
A higher pair has__________.

No contact
None of these
Point contact
Surface contact

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Theory of Machine
The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity ω₁ rad/s in the clockwise direction and the link OB turns with angular velocity ω₂ rad/s in the clockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)

(ω₁ - ω₂)r
(ω₁ + ω₂)r
(ω₁ - ω₂)2r
ω₁.ω₂.r

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Theory of Machine
In vibration isolation system, if ω/ωn < 2, then for all values of damping factor, the transmissibility will be (where ω = Angular speed of the system, ωn = Natural frequency of vibration of the system)

Equal to unity
Less than unity
Greater than unity
Zero

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Theory of Machine
If the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then energy stored in the latter at the same speed will be

One fourth of the first one
One and a half times the first one
Four times the first one
Same as the first one

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Theory of Machine
Rectangular bar in a rectangular hole is the following type of pair

Incompletely constrained motion
Freely constrained motion
Completely constrained motion
Partially constrained motion

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Theory of Machine
Which gear train is used for higher velocity ratios in a small space?

Reverted gear train
Epicyclic gear train
Simple gear train
Compound gear train

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