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Theory of Machine

Theory of Machine
If there are L number of links in a mechanism, then number of possible inversions is equal to

L - 1
L
L + 1
L + 2

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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 - 1)/n
ω²r. n/(n + 1)

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Theory of Machine
The mechanism forms a structure, when the number of degrees of freedom (n) is equal to

1
2
-1

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Theory of Machine
The maximum or minimum value of the swaying couple is

± a (1 - c) m.ω².r
± 2a (1 - c) m.ω².r
± c.m.ω².r
± (a/√2) (1 - c) m.ω².r

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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
Data are insufficient to determine same
Same
Less

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Theory of Machine
A Hartnell governor has its controlling force (Fc) given by Fc = ar + b, where r is the radius of rotation and a and b are constants. The governor becomes isochronous when

a is +ve and b is -ve
a is +ve and b is also +ve
a = 0 and b is +ve
a is +ve and b = 0

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MORE MCQ ON Theory of Machine

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