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Theory of Machine

Theory of Machine
The radial distance from the top of a tooth to the bottom of a tooth in a meshing gear, is called

Addendum
Working depth
Clearance
Dedendum

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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

Damping factor
Damping coefficient
Magnification factor
Logarithmic decrement

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Theory of Machine
The velocity of a particle moving with simple harmonic motion, at any instant is given by (where ω = Displacement of the particle from mean position)

ω √(x² - r²)
ω² √(x² - r²)
ω √(r² - x²)
ω² √(r² - x²)

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Theory of Machine
In a flat collar pivot bearing, the moment due to friction is proportional to

(r₁² - r₂²)/(r₁ - r₂)
(r₁³ - r₂³)/(r₁² - r₂²)
(r₁³ - r₂³)/(r₁ - r₂)
(r₁² - r₂²)/(r₁ + r₂)

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

Roller cam mechanism
Slider crank mechanism
Five link mechanism
Kinematic chain

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Theory of Machine
When the sleeve of a Porter governor moves downwards, the governor speed

Decreases
First increases and then decreases
Remain unaffected
Increases

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