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Theory of Machine

Theory of Machine
The total number of instantaneous centers for a mechanism consisting of n links are

n
n(n - 1)/2
n/2
n - 1

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Theory of Machine
Tangential acceleration direction is

Perpendicular to angular velocity
Opposite to angular velocity
Along the angular velocity
May be any one of these

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Theory of Machine
If ‘D₁’ and ‘D₂’ be the diameters of driver and driven pulleys, then belt speed is proportional to

D₁
D₁.D₂
D₂/D₁
D₁/D₂

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Theory of Machine
The displacement of the D-slide valve is __________ the steam lap by a distance known as lead of the valve.

Equal to
None of these
Greater than
Less than

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Theory of Machine
A mass of 1 kg is attached to the end of a spring with a stiffness of 0.7 N/mm. The critical damping coefficient of this system is

529.2 N-s/m
52.92 N-s/m
1.4 N-s/m
18.52 N-s/m

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

6π Hz
3 Hz
3π Hz
6 Hz

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