Related Questions

Vibrating screens are used for handling large tonnages of materials. The vibrating motion is imparted to the screening surface by means of
A Electromagnets
B Cams or eccentric shafts
C Unblanced fly wheels
D Either A, B or C
Overmodulation (amplitude) occurs when signal amplitude is ___________ carrier amplitude
A Equal to
B Greater than
C Less than
D None of the above
When there is a reduction in amplitude over every cycle of vibration, then the body is said to have
A free vibration
B forced vibration
C damped vibration
D none of the mentioned
The amplitude of vibration is always __________ the radius of the circle.
A Equal to
B Less than
C Greater than
D None of these
At the nodal point in a shaft, the amplitude for torsional vibration will be
A Minimum
B Maximum
C Zero
D Infinity
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
In a second order under damped system, the
A Time required for the response of first reach its ultimate value is called the response time
B Overshoot (which is a measure of how much the response exceeds the ultimate value) increase with the decrease of damping co-efficient e
C Decay ratio (which is the ratio of the sizes of successive peaks) is equal to the reciprocal of overshoot
D None of these
What is the ratio of output amplitude to input amplitude for a sinusoidal forcing function in a first order system?
A 1
B >1
C None of these
If the damping factor for a vibrating system is unity, then the system will be
A Over damped
B Under damped
C Critically damped
D Without vibrations
If the gain of the critical damped system is increased it will behave as
A Oscillatory
B Critically damped
C Overdamped
D Underdamped

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