Control Systems mcq questions answers part1

Q1. In order to increase the damping of a badly underdamped system which of following compensators may be used ?
(A) Phase-lead
(B) Phase-lag
(C) Both a and b
(D) None of these

Q2. Addition of zeros in transfer function causes
(A) Lead-compensation
(B) Lag-compensation
(C) Lead-lag compensation
(D) None of the above

Q3. Phase margin of a system is used to specify
(A) Frequency response
(B) Absolute stability
(C) Relative stability
(D) Time response

Q4. Which of the following is the best method for determining the stability and transient response?
(A) Root locus
(B) Bode plot
(C) Nyquist plot
(D) None of these

Q5. Velocity error constant of a system is measured when the input to the system is unit.
(A) parabolic
(B) ramp
(C) impulse
(D) step

Q6. The position and velocity errors of a type-2 system are
(A) constant, constant
(B) constant, infinity
(C) zero, constant
(D) zero, zero

Q7. From which of the following transfer function can be obtained?
(A) Signal flow graph
(B) Output input ratio
(C) output signal
(D) None of the above

Q8. The transfer function is applicable to which of the following ?
(A) Linear and time-in variant systems
(B) Linear and time-variant systems
(C) time-variant systems
(D) Non-linear systems

Q9. The transient response of a system is mainly due to
(A) inertia forces
(B) internal forces
(C) stored energy
(D) friction

Q10. Which of the following is true regarding the band width of a feedback amplifier?
(A) remains unaffected
(B) decreases by the same amount as the gain increase
(C) increases by the same amount as the gain decrease
(D) decreases by the same amount as the gain decrease

Q11. In Regenerative feedback , the feedback has
(A) oscillations
(B) negative sign
(C) positive sign
(D) Any sign

Q12. In negative feedback controller, which of the following factor does not decrease ?
(A) Band width
(B) Overall gain
(C) Distortion
(D) Instability

Q13. In negative feedback closed loop control system,the overall gain of the system will
(A) decrease
(B) increase
(C) be unaffected
(D) any of these

Q14. A control system in which the control action is depend on the output is known as
(A) Closed loop system
(B) Semi-closed loop system
(C) Open loop system
(D) Closed or open loop system

Q15. A closed loop system is different from open loop system by which of the following
(A) Feedback
(B) Output pattern
(C) Input pattern
(D) None of these

Q16. The type 0 system has
(A) No pole at origin
(B) Single pole at origin
(C) Two poles at origin
(D) Three poles at origin

Q17. Error constants of system are measure of
(A) Steady state response
(B) Transient response
(C) Relative stability
(D) Absolute stability

Q18. In a stable control system saturation can cause which of the following ?
(A) Low-level oscillations
(B) High-level oscillations
(C) Conditional stability
(D) Overdamping

Q19. In a feed back system the transient response
(A) Decays slowly
(B) Get magnified
(C) Decays more quickly
(D) Grows slowly

Q20. The sensitivity of a closed loop system to gain changes and load disturbances depend upon
(A) Forward gain
(B) Loop gain
(C) Frequency
(D) All of these