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Theory of Machine

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

Quadrupled
Halved
Doubled
None of these

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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

0°
360°
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

30
10
20
34

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Theory of Machine
Which of the following mechanism is obtained from lower pair?

Valve and valve gears
Pantograph
All of these
Gyroscope

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Theory of Machine
The total number of instantaneous centers for a mechanism consisting of n links are

n
n(n - 1)/2
n - 1
n/2

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Theory of Machine
The coefficient of fluctuation of speed is __________ of maximum fluctuation of speed and the mean speed.

Sum
Difference
Ratio
Product

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