Theory of Machine
Which one of the following can completely balance several masses revolving in different planes on a shaft?

Two equal masses in any two planes
A single mass in one of the planes of the revolving masses
Two masses in any two planes
A single mass in different planes

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Theory of Machine
The frictional torque transmitted in a truncated conical pivot bearing, considering uniform wear, is

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

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Theory of Machine
The maximum fluctuation of speed is the

Difference of the maximum and minimum speeds
Variations of speed above and below the mean resisting torque line
Difference of minimum fluctuation of speed and the mean speed
Sum of maximum and minimum speeds

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