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Theory of Machine

Theory of Machine
If ‘D₁’ and ‘D₂’ be the diameters of driver and driven pulleys, then belt speed is proportional to

D₁
D₂/D₁
D₁/D₂
D₁.D₂

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Theory of Machine
When the crank is at the inner dead centre, in a reciprocating steam engine, then the velocity of the piston will be

Maximum
Minimum
None of these
Zero

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Theory of Machine
When the speed of the engine fluctuates continuously above and below the mean speed, the governor is said to be

Isochronous
Hunt
Stable
Unstable

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Theory of Machine
The example of completely constrained motion is a

Motion of a square bar in a square hole
All of these
Motion of a shaft with collars at each end in a circular hole
Motion of a piston in the cylinder of a steam engine

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Theory of Machine
Ackermann steering gear consists of

Sliding pairs
Rolling pairs
Higher pairs
Turning pairs

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Theory of Machine
The acceleration of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by

ω² (R - r₁) cosθ
ω² (R - r₁) sinθ
ω² r₁ sinθ
ω² R cosθ

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