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Theory of Machine

Theory of Machine
With usual notations for different parameters involved, the maximum fluctuations of energy for a flywheel is given by

2ECS²
EC S/2
2E²CS
2ECS

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Theory of Machine
Tangential acceleration direction is

Along the angular velocity
May be any one of these
Opposite to angular velocity
Perpendicular to angular velocity

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

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Theory of Machine
For S.H.M. cam, the acceleration of the follower at the ends of the stroke and aimed stroke respectively, is

Maximum and zero
Zero and maximum
Minimum and maximum
Zero and minimum

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Theory of Machine
For the same lift and same angle of ascent, a smaller base circle will give

There is no such relation with pressure angle
Something else
A large value of pressure angle
A small value of pressure angle

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Theory of Machine
Efficiency of a screw jack is given by

tanα/tan (α - φ)
tan (α - φ)/tanα
tan (α + φ)/tanα
tanα/tan (α +φ)

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