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Theory of Machine

Theory of Machine
The maximum value of the pressure angle in case of cam is kept as

30°
20°
10°
14°

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Theory of Machine
A single degree of freedom system is given by, m × (d²x/dt²) + c × (dx/dt) + sx = F.cosω.t with usual notations. It represents

Forced vibration without damping
Forced vibration with damping
Free vibration with damping
Free vibration without damping

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Theory of Machine
In its simplest form, a cam mechanism consists of following number of links

3
4
2
1

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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
Less than sum of other two
Equal to sum of other two

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

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

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Theory of Machine
When the crank is at the inner dead center, in a reciprocating steam engine, then the acceleration of the piston will be

ω²r. (n - 1)/n
ω²r. n/(n + 1)
ω²r. n/(n - 1)
ω²r. (n + 1)/n

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