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Theory of Machine

Theory of Machine
The radial distance of a tooth from the pitch circle to the bottom of the tooth is called

Clearance
Working depth
Dedendum
Addendum

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Theory of Machine
The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity ω₁ rad/s in the clockwise direction and the link OB turns with angular velocity ω₂ rad/s in the clockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)

(ω₁ - ω₂)r
(ω₁ - ω₂)2r
(ω₁ + ω₂)r
ω₁.ω₂.r

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Theory of Machine
When the pitching of a ship is upward, the effect of gyroscopic couple acting on it will be

To move the ship towards port side
To raise the bow and lower the stern
To raise the stern and lower the bow
To move the ship towards starboard

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Theory of Machine
The maximum value of the pressure angle in case of cam is kept as

10°
30°
20°
14°

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Theory of Machine
With single Hooke's joint it is possible to connect two shafts, the axes of which have an angular misalignment up to

10°
40°
30°
20°

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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)

¾μWR
μwr
½μWR
²/₃ μWR

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