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Theory of Machine

Theory of Machine
For an involute gear, the ratio of base circle radius and pitch circle radius is equal to

cosecφ
secφ
cosφ
sinφ

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Theory of Machine
The maximum value of the pressure angle in case of cam is kept as

30°
20°
10°
14°

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Theory of Machine
Throw of a cam is the maximum distance of the follower from

Base circle
Pitch circle
Prime circle
Root circle

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Theory of Machine
In a Hartnell governor, the compression of the spring is __________ the lift of the sleeve.

Less than
None of these
Equal to
Greater than

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Theory of Machine
The ratio of maximum fluctuation of energy to the work-done per cycle is called

None of these
Coefficient of fluctuation of energy
Fluctuation of energy
Maximum fluctuation of energy

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Theory of Machine
The acceleration of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by

ω². (r₁ + r₂). [(2 - cos² θ)/cos³ θ]
ω². (r₁ + r₂). (1 + cos² θ)
ω². (r₁ - r₂). (1 - sin² θ)
ω². (r₁ r₂). (1 - cos² θ)

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