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Theory of Machine

Theory of Machine
The frequency of damped vibrations with viscous damping is ________ the frequency of undamped vibrations.

Less than
More than
Same as
None of these

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Theory of Machine
The ratio of the number of teeth to the pitch circle diameter in millimeters, is called

None of these
Circular pitch
Diametral pitch
Module

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Theory of Machine
Which gear train is used for higher velocity ratios in a small space?

Compound gear train
Epicyclic gear train
Reverted gear train
Simple gear train

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Theory of Machine
A mass of 1 kg is attached to the end of a spring with a stiffness of 0.7 N/mm. The critical damping coefficient of this system is

529.2 N-s/m
1.4 N-s/m
52.92 N-s/m
18.52 N-s/m

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Theory of Machine
Coriolis component acts

None of these
Perpendicular to sliding surfaces
Somewhere in between above two
Along sliding surfaces

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Theory of Machine
The Kutzbach criterion for determining the number of degrees of freedom (n) is (where l = number of links, j = number of joints and h = number of higher pairs)

n = 3(l - 1) - 3j - h
n = 2(l - 1) - 2j - h
n = 3(l - 1) - 2j - h
n = 2(l - 1) - 3j - h

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