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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
3 Hz
6π Hz

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Theory of Machine
Which gear is used for connecting two coplanar and intersecting shafts?

Spur gear
Bevel gear
Helical gear
None of these

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Theory of Machine
The Coriolis component of acceleration acts

Along the sliding surface
Parallel to the sliding surface
Perpendicular to the sliding surface
At 45° to the sliding surface

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Theory of Machine
A combination of kinematic pairs, joined in such a way that the relative motion between the links is completely constrained, is called a

Structure
Mechanism
Kinematic chain
Inversion

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Theory of Machine
The secondary unbalanced force is maximum __________ in one revolution of the crank.

Sixteen times
Eight times
Two times
Four times

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Theory of Machine
The natural frequency of free longitudinal vibrations is equal to (where m = Mass of the body, s = Stiffness of the body, and δ = Static deflection of the body)

0.4985/√δ
1/2π × √(s/m)
Any one of the listed here
1/2π × √(g/δ)

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