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Theory of Machine

Theory of Machine
If the number of links in a mechanism is equal to l, then the numbers of possible inversions are equal to

l
l + 1
l - 1
l - 2

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Theory of Machine
The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction)

α = 45° + φ/2
α = 45° - φ/2
α = 90° + φ
α = 90° - φ

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Theory of Machine
Scotch yoke mechanism is used to generate

Inversions
Sine functions
Square roots
Logarithms

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Theory of Machine
If the radius of gyration of a compound pendulum about an axis through e.g. is more, then its frequency of oscillation will be

More
Less
Same
Data are insufficient to determine same

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Theory of Machine
Which of the following is an example of a higher pair?

Toothed gearing
Ball and roller bearing
Belt and rope drive
All of the listed here

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Theory of Machine
When the nature of contact between the elements of a pair is such that one element can turn about the other by screw threads, the pair is known as a

Spherical pair
Screw pair
Turning pair
Sliding pair

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