Related Questions

In steady state forced vibrations, the amplitude of vibrations at resonance is __________ damping coefficient.
A Equal to
B Directly proportional to
C Inversely proportional to
D Independent of
In a system subjected to damped forced vibrations, the ratio of maximum displacement to the static deflection is known as
A Critical damping ratio
B Damping factor
C Logarithmic decrement
D Magnification factor
If $$\frac{\omega }{{\omega {\text{n}}}}$$ is very high for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach
A 0°
B 90°
C 180°
D 360°
If $$\frac{\omega }{{\omega {\text{n}}}}$$ is very low for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach
A 0°
B 90°
C 180°
D 360°
When a shaking force is transmitted through the springs, damping becomes detrimental when the ratio of its frequency to the natural frequency is greater than
A 0.25
B 0.5
C 1
D 2
If the gain of the critical damped system is increased it will behave as
A Oscillatory
B Critically damped
C Overdamped
D Underdamped
If the transient response is under damped:
A steady-state will be reached faster than if the system is overdamped
B the value of the output will exceed the value of the input at times during the transient period
C the present overshoot is zero
D both a and b
E None of the above
The oscillations in a synchronous motor can be damped out by
A maintaining constant excitation
B running the motor on leading power factors
C providing damper bars in the rotor pole faces
D oscillations cannot be damped
A typical example of a physical system with under damped characteristic is a
A U-tube manometer
B Spring loaded diaphragm valve
C CSTR with first order reaction
D Thermocouple kept immersed in a liquid filled thermowell
When a mass of a critically damped single degree of freedom system is deflected from its equilibrium position and released, then it will
A Return to equilibrium position without oscillation
B Oscillate with increasing time period
C Oscillate with decreasing amplitude
D Oscillate with constant amplitude

Next steps