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Theory of Machine

Theory of Machine
The secondary unbalanced force is __________ the primary unbalanced force.

1/n times
Two-third
n times
One-half

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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) 2r
ω₁.ω₂.r

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Theory of Machine
Cam size depends upon

Pitch circle
Prime circle
Base circle
Outer circle

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Theory of Machine
In vibration isolation system, if ω/ωn > 1, then the phase difference between the transmitted force and the disturbing force is

90°
270°
180°
0°

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

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

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Theory of Machine
In full depth involute system, the smallest number of teeth in a pinion which meshes with rack without interference is

25
16
32
12

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