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Theory of Machine

Theory of Machine
The number of centers in a crank driven slider crank mechanism is

4
2
6

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Theory of Machine
The absolute acceleration of any point ‘P’ in a link about center of rotation ‘O’ is

Perpendicular to PO
Along PO
None of the listed here
At 45° to PO

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Theory of Machine
The velocity of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by (where ω = Angular velocity of the cam shaft)

ω (r₁ + r₂) cosθ cosec2θ
ω (r₁ r₂) cosθ
ω (r₁ r₂) sinθ
ω (r₁ + r₂) sinθ sec2θ

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Theory of Machine
In automobiles the power is transmitted from gear box to differential through

Hooke's joint
Knuckle joint
Universal joint
Bevel gear

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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

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

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Theory of Machine
The power transmitted by a belt is maximum when the maximum tension in the belt is _________ of centrifugal tension.

Two-third
One-third
Three times
Double

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