Theory of Machine
The working depth of a gear is the radial distance from the

Top of a tooth to the bottom of a tooth
Addendum circle to the clearance circle
Pitch circle to the bottom of a tooth
Pitch circle to the top of a tooth

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Theory of Machine
A thin circular disc is rolling with a uniform linear speed, along a straight path on a plane surface. Which of the following statement is correct in this regard?

The point on the disc making contact with the plane surface has zero acceleration
The centre of the disc has zero acceleration
The centre of the disc has centrifugal acceleration
All points of the disc have the same velocity

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

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

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