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Theory of Machine

Theory of Machine
The critical speed of a shaft depends upon its

Mass
Mass and stiffness
Stiffness and eccentricity
Stiffness

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Theory of Machine
The example of lower pair is

Automobile steering gear
Shaft revolving in a bearing
Straight line motion mechanisms
All of these

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Theory of Machine
A Porter governor is a

Spring loaded governor
Inertia governor
Pendulum type governor
Dead weight governor

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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 clockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)

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

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Theory of Machine
Which type of gearing is used in steering system of an automobile?

Worm and wheel
Spiral gears
None of the listed here
Rack and pinion

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Theory of Machine
When the speed of the engine fluctuates continuously above and below the mean speed, the governor is said to be

Stable
Unstable
Isochronous
Hunt

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MORE MCQ ON Theory of Machine

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