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Theory of Machine

Theory of Machine
Any point on a link connecting double slider crank chain will trace a

Ellipse
Circle
Parabola
Straight line

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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.

None of these
Complex conjugate
Real
Equal

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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
A disc is a spinning with an angular velocity ω rad/s about the axis of spin. The couple applied to the disc causing precession will be (where I = Mass moment of inertia of the disc, and ωP = Angular velocity of precession of the axis of spin)

Iω²
I ω ωP
(1/2). I ω ωP
(1/2).Iω²

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Theory of Machine
The ratio of the maximum displacement of the forced vibration to the deflection due to the static force, is known as

Magnification factor
Logarithmic decrement
Damping coefficient
Damping factor

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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

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

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