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Theory of Machine

Theory of Machine
Scotch yoke mechanism is used to generate

Inversions
Logarithms
Square roots
Sine functions

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Theory of Machine
Cylindrical cams can be classified as

None of these
Reciprocating
Tangent
Circular

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Theory of Machine
Sense of tangential acceleration of a link

Is opposite to that of velocity
Is perpendicular to that of velocity
Could be either same or opposite to velocity
Is same as that of velocity

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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)r
ω₁.ω₂.r
(ω₁ - ω₂)2r

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Theory of Machine
A fixed gear having 200 teeth is in mesh with another gear having 50 teeth. The two gears are connected by an arm. The number of turns made by the smaller gear for one revolution of arm about the centre of bigger gear is

2
3
5
4

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Theory of Machine
In S.H.M., the velocity vector w.r.t. displacement vector

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

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