Theory of Machine
A torsional system with discs of moment of inertia I₁ and I₂ as shown in the below figure, is gear driven such that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft B at the speed of shaft A is equal to

G².I₂
G.I₂
I₂/G
I₂/G²

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Theory of Machine
The maximum fluctuation of energy is the

Ratio of the mean resisting torque to the work-done per cycle
Sum of the maximum and minimum energies
Variations of energy above and below the mean resisting torque line
Difference between the maximum and minimum energies

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Theory of Machine
Which of the following statement is correct for involute gears?

A convex flank is always in contact with concave flank.
The interference is inherently absent.
The pressure angle is constant throughout the teeth engagement.
The variation in centre distance of shafts increases radial force.

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Theory of Machine
Lower pairs are those which have

Elements of pairs not held together mechanically
Surface contact between the two elements when in motion
Point or line contact between the two elements when in motion
Two elements that permit relative motion

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Theory of Machine
In a four bar chain or quadric cycle chain

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

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