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Theory of Machine

Theory of Machine
With single Hooke's joint it is possible to connect two shafts, the axes of which have an angular misalignment up to

40°
10°
20°
30°

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Theory of Machine
What is the number of instantaneous centers for an eight link mechanism?

30
8
28
15

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

ω² r {(n + 1)/n}
ω² r {n/(n + 1)}
ω² r {(n - 1)/n}
ω² r {n/(n - 1)}

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

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Theory of Machine
In order to double the period of a simple pendulum, the length of the string should be

Quadrupled
None of these
Doubled
Halved

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Theory of Machine
A mechanism is an assemblage of

Two links
Three links
Four or more than four links
All of these

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