Theory of Machine
In a multiple V-belt drive, if one of the belts is broken, then we should replace

The broken belt only
All the belts
The broken belt and the belts on either side of it
None of these

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Theory of Machine
The frictional torque transmitted in a flat collar bearing, considering uniform pressure, is (where r₁ and r₂ = External and internal radii of collar respectively)

(1/2). μ W [(r₁³ - r₂³)/(r₁² - r₂²)]
(2/3). μ W [(r₁³ - r₂³)/(r₁² - r₂²)]
(1/2). μ W (r₁ + r₂)
(2/3). μ W (r₁ + r₂)

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Theory of Machine
Angle of ascent of cam is defined as the angle

During which the follower returns to its initial position
Through which the cam rotates during the period in which the follower remains in highest position
Moved by the cam from the instant the follower begins to rise, till it reaches its highest position
Of rotation of the cam for a definite displacement of the follower

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