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Theory of Machine

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

34
20
10
30

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Theory of Machine
A watt's governor can work satisfactorily at speeds from

100 to 200 r.p.m.
60 to 80 r.p.m.
200 to 300 r.p.m.
80 to 100 r.p.m.

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Theory of Machine
Klein's construction is useful to determine

Angular acceleration of various parts
Displacement of various parts
Acceleration of various parts
Velocity of various parts

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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

2.50 mm
3.0 mm
2 mm
2.22 mm

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Theory of Machine
When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the ________ pulley must be taken into consideration.

Larger
Smaller
None of the listed here
Smaller OR Larger

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Theory of Machine
A rigid body possesses ________degrees of freedom

One
Two
Four
Six

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