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Theory of Machine

Theory of Machine
If ω/ωn is very high for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach

360°
0°
180°
90°

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Theory of Machine
Minimum number of teeth for involute rack and pinion arrangement for pressure angle of 20° is

10
30
34
20

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Theory of Machine
A Porter governor is a

Dead weight governor
Pendulum type governor
Inertia governor
Spring loaded governor

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Theory of Machine
The secondary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is

None of these
Both (A) and (B)
0° and 90°
180° and 360°

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

L
L - 1
L + 2
L + 1

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

None of these
Quadrupled
Doubled
Halved

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