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Theory of Machine

Theory of Machine
An automobile steering gear is an example of

Lower pair
Rolling pair
Higher pair
Sliding pair

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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) r
ω₁.ω₂.r
(ω₁ + ω₂) r
(ω₁ - ω₂) 2r

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Theory of Machine
The retardation of a flat faced follower when it has contact at the apex of the nose of a circular arc cam, is given by (where OQ = Distance between the centre of circular flank and centre of nose)

ω² × OQ sinθ
ω² × OQ tanθ
ω² × OQ
ω² × OQ cosθ

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Theory of Machine
The example of higher pair is

All of these
Ball and roller bearings
Belt, rope and chain drives
Gears, cams

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Theory of Machine
Coriolis component is encountered in

Quick return mechanism of shaper
Four bar chain mechanism
Both (A) and (C) above
Slider crank mechanism

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Theory of Machine
An eccentric sheave pivoted at one point rotates and transmits oscillatory motion to a link whose one end is pivoted and other end is connected to it. This mechanism has

2 links
5 links
3 links
4 links

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MORE MCQ ON Theory of Machine

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