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Theory of Machine

Theory of Machine
Cam size depends upon

Outer circle
Pitch circle
Prime circle
Base circle

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Theory of Machine
Scotch yoke mechanism is used to generate

Square roots
Inversions
Sine functions
Logarithms

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Theory of Machine
The maximum efficiency of spiral gears is (where θ = Shaft angle, and φ = Friction angle)

sin (θ + φ) + 1/ cos (θ - φ) + 1
cos (θ + φ) + 1/ cos (θ - φ) + 1
cos (θ - φ) + 1/ cos (θ + φ) + 1
cos (θ - φ) + 1/ sin (θ + φ) + 1

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Theory of Machine
When a point moves along a straight line, its acceleration will have

Radial component only
Coriolis component only
Tangential component only
Radial and tangential components both

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Theory of Machine
The tractive force is maximum or minimum when the angle of inclination of crank with the line of stroke (θ) is equal to

135° and 315°
270° and 360°
90° and 180°
0° and 90°

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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

Isochronous
None of these
Unstable
Stable

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MORE MCQ ON Theory of Machine

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