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Theory of Machine

Theory of Machine
The Coriolis component of acceleration leads the sliding velocity by

90°
45°
180°
135°

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Theory of Machine
When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the other, the pair formed is known as a

Self-closed pair
Force-closed pair
Higher pair
Lower pair

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Theory of Machine
The secondary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is

180° and 360°
Both (A) and (B)
0° and 90°
None of these

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Theory of Machine
The maximum or minimum value of the swaying couple is

± a (1 - c) m.ω².r
± 2a (1 - c) m.ω².r
± (a/√2) (1 - c) m.ω².r
± c.m.ω².r

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Theory of Machine
A typewriter mechanism has 7 numbers of binary joints, six links and none of higher pairs. The mechanism is

Data is not sufficient to determine same
Kinematically sound
Not sound
Soundness would depend upon which link is kept fixed

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

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