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Theory of Machine

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

8
30
28
15

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Theory of Machine
The displacement of the D-slide valve is __________ the steam lap by a distance known as lead of the valve.

Less than
Equal to
None of these
Greater than

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Theory of Machine
Bifilar suspension method is used to find the

Moment of inertia of the body
Angular acceleration of the body
Periodic time of the body
Frequency of vibration of the body

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Theory of Machine
A shaft has an attached disc at the centre of its length. The disc has its centre of gravity located at a distance of 2 mm from the axis of the shaft. When the shaft is allowed to vibrate in its natural bow-shaped mode, it has a frequency of vibration of 10 rad/s. When the shaft is rotated at 300 r.p.m., it will whirl with a radius of

3.0 mm
2.22 mm
2 mm
2.50 mm

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Theory of Machine
The periodic time of one oscillation for a simple pendulum is

(1/2π). √(g/l)
2π. √(g/l)
2π. √(l/g)
(1/2π). √(l/g)

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Theory of Machine
The main disadvantage of the sliding pair is that it is

Difficult to manufacture
Wears rapidly
Bulky
Both (A) and (B) above

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