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Theory of Machine

Theory of Machine
With single Hooke's joint it is possible to connect two shafts, the axes of which have an angular misalignment up to

40°
30°
10°
20°

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

Ellipse
Circle
Straight line
Parabola

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Theory of Machine
The ratio of maximum fluctuation of speed to the mean speed is called

Coefficient of fluctuation of speed
None of these
Maximum fluctuation of speed
Fluctuation of speed

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Theory of Machine
The example of spherical pair is

Lead screw of a lathe
Ball bearing and roller bearing
Ball and socket joint
Bolt and nut

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Theory of Machine
The critical speed of a shaft with a disc supported in between is equal to the natural frequency of the system in

All of these
Torsional vibrations
Transverse vibrations
Longitudinal vibrations

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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)2r
(ω₁ - ω₂)r
ω₁.ω₂.r

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