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Theory of Machine

Theory of Machine
Rectilinear motion of piston is converted into rotary by

Gudgeon pin
Connecting rod
Slider crank
Cross head

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Theory of Machine
The radius of a friction circle for a shaft rotating inside a bearing is (where r = Radius of shaft, and tan φ = Coefficient of friction between the shaft and bearing)

r sinφ
(r/2) cosφ
r cosφ
r tanφ

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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
The frequency of damped vibrations with viscous damping is ________ the frequency of undamped vibrations.

More than
Same as
None of these
Less than

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Theory of Machine
A mechanism consisting of four links is called a __________ mechanism.

Simple
None of these
Compound
Binary

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Theory of Machine
In a steam engine, the distance by which the outer edge of the D-slide valve overlaps the steam port is called

None of these
Lead
Exhaust lap
Steam lap

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