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Theory of Machine

Theory of Machine
Cam size depends upon

Pitch circle
Prime circle
Outer circle
Base circle

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Theory of Machine
Frequency of vibrations is usually expressed in

Number of cycles per minute
Number of cycles per second
Number of cycles per hour
None of these

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Theory of Machine
The acceleration of a particle at any instant has two components i.e. radial component and tangential component. These two components will be

Perpendicular to each other
Opposite to each other
Inclined at 45°
Parallel to each other

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Theory of Machine
The tractive force in a locomotive with two cylinders is given by (where c = Fraction of reciprocating parts per cylinder, m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, and θ = Angle of inclination of crank to the line of stroke)

m.ω².r cosθ
(1 - c).m.ω².r (cosθ - sinθ)
m.ω².r (cosθ - sinθ)
m.ω².r sinθ

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Theory of Machine
Scotch yoke mechanism is used to generate

Square roots
Logarithms
Sine functions
Inversions

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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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