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Theory of Machine

Theory of Machine
The equation of free vibrations of a system is (d²x/dt²) +36 π²x, its natural frequency is

6 Hz
3π Hz
6π Hz
3 Hz

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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
If the opposite links of a four bar linkage are equal, the links will always form a

Parallelogram
Triangle
Pentagon
Rectangle

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

ω²r. n/(n - 1)
ω²r. (n - 1)/n
ω²r. n/(n + 1)
ω²r. (n + 1)/n

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Theory of Machine
To connect two parallel and coplanar shafts the following type of gearing is used

Bevel gear
Spiral gear
Spur gear
None of the listed here

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Theory of Machine
The stress induced in a body will be shear stress, when it is subjected to

None of these
Torsional vibrations
Longitudinal vibrations
Transverse vibrations

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