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Theory of Machine

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

15
28
30
8

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Theory of Machine
The equation of motion for a vibrating system with viscous damping is (d²x/dt²) + (c/m).(dx/dt) + (s/m).x = 0, if the roots of the equation are __________ then the system will be under damped.

Equal
None of these
Complex conjugate
Real

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Theory of Machine
The instantaneous centers which vary with the configuration of mechanism are called

Fixed instantaneous centers
Permanent instantaneous centers
None of these
Neither fixed nor permanent instantaneous centers

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Theory of Machine
In higher pair, the relative motion is

Purely rotary
Combination of sliding and turning
Purely turning
Purely sliding

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Theory of Machine
In a locomotive, the maximum magnitude of the unbalanced force along the perpendicular to the line of stroke, is known as

Tractive force
None of these
Hammer blow
Swaying couple

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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

Zero
Maximum
Minimum
None of these

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