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Theory of Machine

Theory of Machine
Which of the following has sliding motion?

Cross-head
Connecting rod
Crank
Crank pin

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Theory of Machine
A reed type tachometer use the principle of

Transverse vibration
Damped free vibration
Longitudinal vibration
Torsional vibration

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Theory of Machine
In a ball bearing, ball and bearing forms a

Turning pair
Spherical pair
Screw pair
Rolling pair

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Theory of Machine
A mass of 1 kg is attached to the end of a spring with a stiffness of 0.7 N/mm. The critical damping coefficient of this system is

18.52 N-s/m
529.2 N-s/m
1.4 N-s/m
52.92 N-s/m

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Theory of Machine
A spring controlled governor is said to be unstable when the controlling force

Increases as the radius of rotation decreases
Increases as the radius of rotation increases
Remains constant for all radii of rotation
Decreases as the radius of rotation increases

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Theory of Machine
The critical speed of a shaft depends upon its

Stiffness
Stiffness and eccentricity
Mass and stiffness
Mass

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