Machine Design
Which of the following statement is correct, for two shafts connected in parallel?

Torsional stiffness of each shaft is the same
Torque in each shaft is the same
Angle of twist of each shaft is the same
Shear stress in each shaft is the same

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Machine Design
Spring index is

Its capability of storing energy
Ratio of coil diameter to wire diameter
Load required to produce unit deflection
Indication of quality of spring

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