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Theory of Machine

Theory of Machine
The size of cam depends upon

Pitch curve
Pitch circle
Base circle
Prime circle

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Theory of Machine
The unbalanced force due to revolving masses

Varies in magnitude and direction both
Constant in magnitude and direction both
Varies in magnitude but constant in direction
Varies in direction but constant in magnitude

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Theory of Machine
The radial distance from the top of a tooth to the bottom of a tooth in a meshing gear, is called

Working depth
Clearance
Addendum
Dedendum

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Theory of Machine
A Hartnell governor has its controlling force (Fc) given by Fc = ar + b, where r is the radius of rotation and a and b are constants. The governor becomes isochronous when

a is +ve and b is also +ve
a is +ve and b is -ve
a = 0 and b is +ve
a is +ve and b = 0

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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 tanθ
W cosecθ
W sinθ
W cosθ

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Theory of Machine
In order to double the period of a simple pendulum, the length of the string should be

Halved
Quadrupled
Doubled
None of these

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