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Theory of Machine

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
cosβ
sinβ
secβ

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Theory of Machine
The example of completely constrained motion is a

Motion of a piston in the cylinder of a steam engine
All of these
Motion of a shaft with collars at each end in a circular hole
Motion of a square bar in a square hole

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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

sinφ
cosφ
secφ
cosecφ

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Theory of Machine
The Ackermann steering mechanism is preferred to the Davis type in automobiles because

The former is most economical
The former is most rigid
The former is mathematically accurate
The former is having turning pair

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Theory of Machine
The fundamental equation for correct steering is (where φ and α = Angle through which the axis of the outer wheel and inner wheel turns respectively, c = Distance between the pivots of the front axles, and d = Wheel base)

cotφ - cotα = c/b
sinφ + sinα = b/c
tanφ + cotα = b/c
cosφ - sinα = c/b

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