Computer Programming MCQs

5739 MCQs  (Page 298 of 574)

A.C. servomotor resembles_____________?
A. Two phase induction motor
B. Three phase induction motor
C. Direct current series motor
D. Universal motor
A control system with excessive noise, is likely to suffer from_______________?
A. Saturation in amplifying stages
B. Loss of gain
C. Vibrations
D. Oscillations
Regenerative feedback implies feedback with_______________?
A. Oscillations
B. Step input
C. Negative sign
D. Positive sign
increases the steady state accuracy?
A. Integrator
B. Differentiator
C. Phase lead compensator
D. Phase lag compensator
The second derivative input signals modify which of the following ?
A. The time constant of the system
B. Damping of the system
C. The gain of the system
D. The time constant and suppress the oscillations
Which of the following statements is correct for a system with gain margin close to unity or a phase margin close to zero ?
A. The system is relatively stable
B. The system is highly stable
C. The system is highly oscillatory
D. None of the above
The transient response, with feedback system_____________?
A. Rises slowly
B. Rises quickly
C. Decays slowly
D. Decays quickly
Which of the following statements is correct for any closed loop system ?
A. All the co-efficients can have zero value
B. All the co-efficients are always non-zero
C. Only one of the static error co-efficients has a finite non-zero value
D. None of the above