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Theory of Machine

Theory of Machine
Scotch yoke mechanism is used to generate

Logarithms
Inversions
Sine functions
Square roots

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

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Theory of Machine
A spring controlled governor is said to be unstable when the controlling force

Increases as the radius of rotation increases
Decreases as the radius of rotation increases
Remains constant for all radii of rotation
Increases as the radius of rotation decreases

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Theory of Machine
A reed type tachometer use the principle of

Transverse vibration
Torsional vibration
Damped free vibration
Longitudinal vibration

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Theory of Machine
If the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then energy stored in the latter at the same speed will be

One and a half times the first one
Same as the first one
Four times the first one
One fourth of the first one

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Theory of Machine
To transmit power from one rotating shaft to another whose axes are neither parallel nor intersecting, use?

Worm gear
Spur gear
Bevel gear
Spiral gear

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