Theory of Machine
In a disc clutch, if there are n₁ number of discs on the driving shaft and n₂ number of discs on the driven shaft, then the number of pairs of contact surfaces will be

n₁ + n₂ + 1
n₁ + n₂ - 1
n₁ + n₂
n₁ + n₂ - 2

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Theory of Machine
A body in motion will be subjected to Coriolis acceleration when that body is

Restrained to rotate while sliding over another body
In plane motion which is a resultant of plane translation and rotation
In plane rotation with variable velocity
In plane translation with variable velocity

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Theory of Machine
In order to give a complete secondary balance of a multi-cylinder inline engine,

None of these
The algebraic sum of the secondary forces must be equal to zero
The algebraic sum of the couples about any point in the plane of the secondary forces must be equal to zero
Both (A) and (B)

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