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Theory of Machine

Theory of Machine
A rotary internal combustion engine has __________ cylinders.

Seven
Six
Five
Four

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Theory of Machine
The angle of inclination of the plane, at which the body begins to move down the plane is called

None of these
Angle of repose
Angle of friction
Angle of projection

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Theory of Machine
The train value of a gear train is

Equal to velocity ratio of a gear train
Reciprocal of velocity ratio of a gear train
Always greater than unity
Always less than unity

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

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Theory of Machine
For S.H.M. cam, the acceleration of the follower at the ends of the stroke and aimed stroke respectively, is

Zero and minimum
Minimum and maximum
Maximum and zero
Zero and maximum

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Theory of Machine
For an involute gear, the ratio of base circle radius and pitch circle radius is equal to

cosφ
sinφ
cosecφ
secφ

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