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Theory of Machine

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

Valve and valve gears
Pantograph
Gyroscope
All of these

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Theory of Machine
The height of a Watt's governor (in meters) is equal to (where N = Speed of the arm and ball about the spindle axis)

8.95/N²
8950/N²
89.5/N²
895/N²

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Theory of Machine
The pressure angle of a cam is the angle between the direction of the follower motion and a normal to the

Base circle
Prime circle
Pitch curve
Pitch circle

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Theory of Machine
Peaucellier’s mechanism has

Eight links
Six links
Twelve links
Four links

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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 mm
2.50 mm
2.22 mm

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Theory of Machine
The number of links in pantograph mechanism is equal to

5
4
3
2

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