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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

3 Hz
3π Hz
6π Hz
6 Hz

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Theory of Machine
A reed type tachometer use the principle of

Longitudinal vibration
Torsional vibration
Transverse vibration
Damped free vibration

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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

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

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Theory of Machine
Which of the following would constitute a link?

Piston rod and cross head
Piston, crank pin and crank shaft
Piston, piston rod and cross head
Piston and piston rod

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Theory of Machine
In a turning moment diagram, the variations of energy above and below the mean resisting torque line is called

Maximum fluctuation of energy
Fluctuation of energy
None of the listed here
Coefficient of fluctuation of energy

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Theory of Machine
In a screw jack, the effort required to lower the load W is given by

P = W tan(α + φ)
P = W tan(φ - α)
P = W tan(α - φ)
P = W cos(α + φ)

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