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Theory of Machine

Theory of Machine
If the opposite links of a four bar linkage are equal, the links will always form a

Pentagon
Parallelogram
Rectangle
Triangle

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Theory of Machine
Which gear is used for connecting two coplanar and intersecting shafts?

Spur gear
None of these
Helical gear
Bevel gear

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Theory of Machine
The natural frequency of free longitudinal vibrations is equal to (where m = Mass of the body, s = Stiffness of the body, and δ = Static deflection of the body)

1/2π × √(s/m)
0.4985/√δ
1/2π × √(g/δ)
Any one of the listed here

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Theory of Machine
In involute gears, the pressure angle is

Dependent on the size of gears
Always constant
Always variable
Dependent on the size of teeth

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Theory of Machine
The relation between the controlling force (Fc) and radius of rotation (r) for a stable spring controlled governor is

Fc = ar + b
Fc = ar - b
Fc = ar
Fc = a/r + b

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Theory of Machine
A point B on a rigid link AB moves with respect to A with angular velocity ω rad/s. The radial component of the acceleration of B with respect to A, is (where vBA = Linear velocity of B with respect to A)

v²BA
vBA × AB
vBA /AB
v²BA /AB

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