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Theory of Machine

Theory of Machine
When a ship travels in a sea, which of the effect is more dangerous

Pitching
Rolling
Steering
All of these

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Theory of Machine
According to Kennedy's theorem, if three bodies move relatively to each other, their instantaneous centers will lie on a

Parabolic curve
Straight line
Rectangle
Triangle

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Theory of Machine
The direction of linear velocity of any point on a link with respect to another point on the same link is

None of the listed here
At 45° to the link joining the points
Parallel to the link joining the points
Perpendicular to the link joining the points

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Theory of Machine
In a drag link quick return mechanism, the shortest link is always fixed. The sum of the shortest and longest link is

Greater than sum of other two
There is no such relationship
Equal to sum of other two
Less than sum of other two

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

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Theory of Machine
Idler pulley is used

For increasing velocity ratio
For changing the direction of motion of the belt
All of the listed here
For applying tension

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