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Theory of Machine

Theory of Machine
At the nodal point in a shaft, the amplitude for torsional vibration will be

Minimum
Maximum
Zero
Infinity

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Theory of Machine
A cam mechanism imparts following motion

Rotating
Reciprocating
Oscillating
All of these

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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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Theory of Machine
Typewriter constitutes

Inversion
Machine
Structure
Mechanism

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Theory of Machine
The primary unbalanced force is maximum _________ in one revolution of the crank.

Four times
Eight times
Sixteen times
Twice

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Theory of Machine
In locomotives, the ratio of the connecting rod length to me crank radius is kept very large in order to

Minimize the effect of secondary forces
Minimize the effect of primary forces
Have perfect balancing
To start the locomotive quickly

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