Theory of Machine
The ratio of maximum fluctuation of speed to the mean speed is called

Maximum fluctuation of speed
Fluctuation of speed
Coefficient of fluctuation of speed
None of these

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Theory of Machine
The secondary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, θ = Angle of inclination of crank with the line of stroke, and n = Ratio of the length of connecting rod to radius of crank)

m.ω².r cosθ
m.ω².r (sin 2θ/n)
m.ω².r sinθ
m.ω².r (cos 2θ/n)

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Theory of Machine
The maximum fluctuation of speed is the

Difference of minimum fluctuation of speed and the mean speed
Difference of the maximum and minimum speeds
Variations of speed above and below the mean resisting torque line
Sum of maximum and minimum speeds

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