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Theory of Machine

Theory of Machine
Cam size depends upon

Base circle
Outer circle
Prime circle
Pitch circle

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Theory of Machine
When a body is subjected to transverse vibrations, the stress induced in a body will be

Bending stress
Shear stress
Tensile stress
Compressive stress

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Theory of Machine
If ‘D₁’ and ‘D₂’ be the diameters of driver and driven pulleys, then belt speed is proportional to

D₁/D₂
D₁
D₁.D₂
D₂/D₁

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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 anticlockwise 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) 2r
(ω₁ - ω₂) r

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Theory of Machine
The minimum force required to slide a body of weight W on a rough horizontal plane is

W cosθ
W cosecθ
W tanθ
W sinθ

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Theory of Machine
When the relation between the controlling force (Fc) and radius of rotation (r) for a spring controlled governor is Fc = ar + b, then the governor will be

Stable
Isochronous
Unstable
None of these

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