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Theory of Machine

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

8
30
15
28

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Theory of Machine
In a reciprocating steam engine, which of the following forms a kinematic link?

Cylinder and piston
Piston rod and connecting rod
Crankshaft and flywheel
Flywheel and engine frame

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Theory of Machine
The instantaneous center of a rigid thin disc rolling on a plane rigid surface is located at

An infinite distance on the plane surface
The point on the circumference situated vertically opposite to the contact point
The point of contact
The center of the disc

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Theory of Machine
The values of velocity and acceleration of piston at near dead center for a slider-crank mechanism will be

0, and more than co2r
0, and less than coV
0, 0
cor, 0

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

Spur gears
Bevel gears
Hooke's joint
Worm and worm wheel

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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 anticlockwise 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) r
(ω₁ - ω₂) 2r

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