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Theory of Machine

Theory of Machine
Shaft revolving in a bearing is the following type of pair

Spherical pair
Cylindrical pair
Lower pair
Higher pair

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Theory of Machine
Relationship between the number of links (L) and number of pairs (P) is

P = 2L - 2
P = 2L + 4
P = 2L - 4
P = 2L + 2

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Theory of Machine
The swaying couple is maximum or minimum when the angle of inclination of the crank to the line of stroke (θ) is equal to

90° and 180°
180° and 270°
270° and 360°
45° and 225°

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Theory of Machine
The periodic time of one oscillation for a simple pendulum is

(1/2π). √(g/l)
2π. √(l/g)
2π. √(g/l)
(1/2π). √(l/g)

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Theory of Machine
The ratio of the driving tensions for V-belts is __________ times that of flat belts.(Where β = Semi-angle of the groove)

cosecβ
sinβ
cosβ
secβ

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Theory of Machine
In S.H.M., the velocity vector w.r.t. displacement vector

Are in phase
Lags by 90°
Leads by 180°
Leads by 90°

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