Theory of Machine
The secondary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is

180° and 360°
0° and 90°
Both (A) and (B)
None of these

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Theory of Machine
When a mass of a critically damped single degree of freedom system is deflected from its equilibrium position and released, then it will

Oscillate with increasing time period
Oscillate with constant amplitude
Return to equilibrium position without oscillation
Oscillate with decreasing amplitude

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Theory of Machine
In a single slider crank chain

Two are turning pairs and two are sliding pairs
One is a turning pair and three are sliding pairs
Each of the four pairs is a turning pair
Three are turning pairs and one is a sliding pair

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

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