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Theory of Machine

Theory of Machine
The number of links in pantograph mechanism is equal to

2
4
3
5

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Theory of Machine
The arrangement is called bevel gearing, when two __________ are connected by gears.

Parallel and coplanar shafts
Parallel and non-coplanar shafts
Non-intersecting and non-coplanar shafts
Intersecting and coplanar shafts

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Theory of Machine
________ is an inversion of Double slider crank chain.

Reciprocating engine
Hand pump
Scotch yoke mechanism
Coupling rod of a locomotive

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

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Theory of Machine
Two systems shall be dynamically equivalent when

All of these
M.I. of two about an axis through e.g. is equal
The mass of two are same
G. of two coincides

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Theory of Machine
The dynamic friction is the friction experienced by a body, when the body

None of these
Just begins to slide over the surface of the other body
Is in motion
Is at rest

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