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Theory of Machine

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

30
15
28
8

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Theory of Machine
The velocity of a body moving with simple harmonic motion is __________ at the mean position.

Minimum
None of these
Zero
Maximum

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Theory of Machine
In under damped vibrating system, the amplitude of vibration

Decreases exponentially with time
Increases exponentially with time
Increases linearly with time
Decreases linearly with time

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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

Hunt
Isochronous
Unstable
Stable

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Theory of Machine
The velocity of any point in mechanism relative to any other point on the mechanism on velocity polygon is represented by the line

Joining the corresponding points
At 45° to line as per (A)
Not possible to determine with these data
Perpendicular to line as per (A)

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Theory of Machine
The Scott-Russell mechanism consists of

Sliding and rotary pairs
Turning and rotary pairs
Sliding pairs only
Sliding and turning pairs

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