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Theory of Machine

Theory of Machine
In a shaper mechanism, the Coriolis component of acceleration will

Depend on position of crank
Not exist
None of these
Exist

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Theory of Machine
In gramophones for adjusting the speed of the turntable, the following type of governor is commonly employed

Pickering governor
Wilson Hartnell governor
Inertia governor
Hartung governor

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Theory of Machine
The Coriolis component of acceleration leads the sliding velocity by

90°
135°
180°
45°

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Theory of Machine
If ω/ωn is very high for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach

0°
180°
90°
360°

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Theory of Machine
A single degree of freedom system is given by, m × (d²x/dt²) + c × (dx/dt) + sx = F.cosω.t with usual notations. It represents

Free vibration with damping
Forced vibration without damping
Free vibration without damping
Forced vibration with damping

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Theory of Machine
The radius of a friction circle for a shaft rotating inside a bearing is (where r = Radius of shaft, and tan φ = Coefficient of friction between the shaft and bearing)

(r/2) cosφ
r tanφ
r cosφ
r sinφ

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