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Theory of Machine

Theory of Machine
The periodic time of one oscillation for a simple pendulum is

(1/2π). √(l/g)
(1/2π). √(g/l)
2π. √(l/g)
2π. √(g/l)

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Theory of Machine
In a simple harmonic motion, the velocity vector with respect to displacement vector

Leads by 90°
Lags by 90°
Leads by 180°
Is in phase

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Theory of Machine
A Hartnell governor is a

Spring loaded governor
Dead weight governor
Pendulum type governor
Inertia governor

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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)

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

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Theory of Machine
The distance by which the __________ of the D-slide valve overlaps the steam port is called exhaust lap.

Outer edge
Inner edge
Corners
None of these

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Theory of Machine
In considering friction of a V-thread, the virtual coefficient of friction (μ₁) is given by

μ₁ = μ cos β
μ₁ = μ sin β
μ₁ = μ/cos β
μ₁ = μ/sin β

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