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Theory of Machine

Theory of Machine
A Porter governor is a

Dead weight governor
Pendulum type governor
Inertia governor
Spring loaded governor

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Theory of Machine
Critical damping is a function of

Mass and stiffness
Mass and natural frequency
Damping coefficient and natural frequency
Mass and damping coefficient

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Theory of Machine
In order to double the period of a simple pendulum, the length of the string should be

None of these
Halved
Quadrupled
Doubled

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Theory of Machine
When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)

[(r² + R²) sinφ]/2
[(r² + R²) cosφ]/2
[(r + R) sinφ]/2
[(r + R) cosφ]/2

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Theory of Machine
Ackermann steering gear consists of

Rolling pairs
Turning pairs
Sliding pairs
Higher pairs

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Theory of Machine
The equation of motion for a single degree of freedom system with viscous damping is 4(dx²/dt²) + 9(dx/dt) + 16x. The damping ratio of the system is

44090
30195
9/128
44082

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