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Theory of Machine

Theory of Machine
Any point on a link connecting double slider crank chain will trace a

Straight line
Circle
Ellipse
Parabola

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Theory of Machine
In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if ω/ωn is

Greater than 2
Equal to 1
Equal to 2
Less than 2

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Theory of Machine
Transmission of power from the engine to the rear axle of an automobile is by means of

Hooke's joint
Compound gears
Worm and wheel method
Crown gear

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Theory of Machine
The frequency of oscillation at compared to earth will be

2.44 times more
6 times more
2.44 times less
6 times less

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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 a simple harmonic motion, the velocity vector with respect to displacement vector

Leads by 90°
Is in phase
Lags by 90°
Leads by 180°

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