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Theory

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Procedure

Simulation

Posttest

References

Contributors

Feedback

Forging hammer as 2DOF system - Free Vibration

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When a vehicle moves on the road, the resonant frequency depends on:

a: Mass, stiffness of the suspension spring, speed Explanation

Explanation

b: Speed of the vehicle only Explanation

Explanation

c: Speed of the vehicle and the stiffness of the suspension spring Explanation

Explanation

d: Amplitude of the undulations Explanation

Explanation

It is not safe to operate a machine:

a: Below natural frequency Explanation

Explanation

b: Above natural frequency Explanation

Explanation

c: At natural frequency Explanation

Explanation

d: None of the above Explanation

Explanation

For free vibration, at t=0 deflection of cantilever beam is

a: Zero Explanation

Explanation

b: Maximum Explanation

Explanation

c: Minimum Explanation

Explanation

d: None of the above Explanation

Explanation

For an undamped system, the amplitude does not change with time

a: True Explanation

Explanation

b: False Explanation

Explanation

A forging system should have a heavy base:

a: To shift natural frequency from excitation frequency Explanation

Explanation

b: As all modes are excited from the impact Explanation

Explanation

c: If not the final workpiece will deform Explanation

Explanation

d: All the above Explanation

Explanation

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