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Theory of Machine

Theory of Machine
If there are L number of links in a mechanism, then number of possible inversions is equal to

L + 2
L
L + 1
L - 1

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Theory of Machine
Which of the following is an inversion of a single slider crank chain?

All of these
Rotary internal combustion engine
Oscillating cylinder engine
Pendulum pump

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Theory of Machine
In railway axle boxes, the bearing used is

Cylindrical roller bearing
Deep groove ball bearing
Double row self aligning ball bearing
Double row spherical roller bearing

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Theory of Machine
The main disadvantage of the sliding pair is that it is

Both (A) and (B) above
Wears rapidly
Difficult to manufacture
Bulky

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Theory of Machine
The displacement of a flat faced follower when it has contact with the flank of a circular arc cam, is given by (where R = Radius of flank, r₁ = Minimum radius of the cam, and θ = Angle turned through by the cam)

R (1 - sinθ)
R (1 - cosθ)
(R - r₁) (1 - sinθ)
(R - r₁) (1 - cosθ)

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Theory of Machine
The magnitude of linear velocity of a point B on a link AB relative to point A is, (Where ω = Angular velocity of the link AB)

ω × AB
ω × (AB)²
ω² × AB
(ω × AB)²

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