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Theory of Machine

Theory of Machine
When a body moves with simple harmonic motion, the product of its periodic time and frequency is equal to

π/2
Zero
One
π

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Theory of Machine
In a spring controlled governor, when the controlling force ____ as the radius of rotation increases, it is said to be a stable governor.

Increases
Decreases
Remains constant
None of the listed here

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Theory of Machine
Whitworth quick return mechanism is obtained by inversion of

Five link mechanism
Roller cam mechanism
Slider crank mechanism
Kinematic chain

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Theory of Machine
The frictional torque transmitted in a flat pivot bearing, assuming uniform wear, is(Where μ = Coefficient of friction, W=Load over the bearing, R=Radius of bearing)

²/₃ μWR
μwr
½μWR
¾μWR

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Theory of Machine
The periodic time is given by (where ω = Angular velocity of the particle in rad/s)

ω × 2π
π/ω
ω/2π
2π/ω

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Theory of Machine
The minimum force required to slide a body of weight W on a rough horizontal plane is

W tanθ
W cosθ
W cosecθ
W sinθ

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