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Theory of Machine

Theory of Machine
Cylindrical cams can be classified as

Reciprocating
None of these
Tangent
Circular

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Theory of Machine
When a rigid body is suspended vertically and it oscillates with a small amplitude under the action of the force of gravity, the body is known as

Second's pendulum
Compound pendulum
Torsional pendulum
Simple pendulum

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Theory of Machine
The natural frequency of free transverse vibrations due to a point load acting over a simply supported shaft is equal to (where δ = Static deflection of a simply supported shaft due to the point load)

0.4985/√δ
0.571/√δ
0.6253/√δ
0.5615/√δ

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Theory of Machine
In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if ω/ωn is

Greater than 2
Equal to 1
Equal to 2
Less than 2

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Theory of Machine
The transmissibility, for all values of damping factor, will be less than unity, if ω/ωn is

Less than 2
Equal to 1
Equal to 2
Greater than 2

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Theory of Machine
When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)

[(r + R) cosφ]/2
[(r² + R²) sinφ]/2
[(r + R) sinφ]/2
[(r² + R²) cosφ]/2

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