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Theory of Machine

Theory of Machine
If there are L number of links in a mechanism, then number of possible inversions is equal to

L - 1
L + 2
L
L + 1

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Theory of Machine
Which of the following is a lower pair?

Both (A) and (B) above
Piston and cylinder
Ball and socket i
Cam and follower

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Theory of Machine
The displacement of a flat faced follower when it has contact with the flank of a circular arc cam, is given by (where R = Radius of flank, r₁ = Minimum radius of the cam, and θ = Angle turned through by the cam)

R (1 - cosθ)
R (1 - sinθ)
(R - r₁) (1 - sinθ)
(R - r₁) (1 - cosθ)

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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)2r
(ω₁ - ω₂)r

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Theory of Machine
Bifilar suspension method is used to find the

Angular acceleration of the body
Frequency of vibration of the body
Moment of inertia of the body
Periodic time of the body

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Theory of Machine
Throw of a cam is the maximum distance of the follower from

Prime circle
Pitch circle
Root circle
Base circle

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MORE MCQ ON Theory of Machine

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