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Theory of Machine

Theory of Machine
The radial distance of a tooth from the pitch circle to the bottom of the tooth is called

Working depth
Addendum
Clearance
Dedendum

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Theory of Machine
The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity ω₁ rad/s in the clockwise direction and the link OB turns with angular velocity ω₂ rad/s in the anticlockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)

(ω₁ - ω₂) 2r
(ω₁ + ω₂) r
(ω₁ - ω₂) r
ω₁.ω₂.r

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Theory of Machine
Torsional vibrations are said to occur when the particles of a body moves

None of these
Parallel to its axis
Perpendicular to its axis
In a circle about its axis

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Theory of Machine
The type of gears used to connect two non parallel and non intersecting shafts is

Bevel gear
Helical gear
Spur gear
Spiral gear

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Theory of Machine
The danger of breakage and vibration is maximum

Above the critical speed
Below the critical speed
None of these
Near the critical speed

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Theory of Machine
Hart mechanism has

Eight links
Six links
Four links
Twelve links

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