Control Systems mcq questions answers part3

Q1. Regenerative feedback implies feedback with
(A) oscillations
(B) step input
(C) negative sign
(D) positive sign

Q2. As a result of introduction of negative feedback which of the following will not decrease ?
(A) Band width
(B) Overall gain
(C) Distortion
(D) Instability

Q3. Which of the following increases the steady state accuracy?
(A) Integrator
(B) Differentiator
(C) Phase lead compensator
(D) Phase lag compensator

Q4. Which of the following should be done to make an unstable system stable?
(A) The gain of the system should be decreased
(B) The gain of the system should be increased
(C) The number of poles to the loop transfer function should be increased
(D) The number of zeros to the loop transfer function should be increased

Q5. Which of the following devices are commonly used as error detectors in instruments ?
(A) Vernistats
(B) Microsyns
(C) Resolvers
(D) All of these

Q6. Any externally introduced signal affecting the controlled output is called a
(A) feedback
(B) stimulus
(C) signal
(D) gain control

Q7. An automatic toaster is
(A) open loop control system.
(B) close loop control system.
(C) partially closed control system.
(D) any of the above

Q8. The type 2 system has a finite non zero value of
(A) Kp
(B) Kv
(C) Ka
(D) None of these

Q9. The type 1 system has a finite non zero value of
(A) Kp
(B) Kv
(C) Ka
(D) None of these

Q10. The type 0 system has a finite non zero value of
(A) Kp
(B) Kv
(C) Ka
(D) None of these

Q11. The transfer function of a intergral controller is of the type
(A) Kc
(B) Ts
(C) 1/Ts
(D) 1/(Ts+1)

Q12. A control system working under unknown random actions is called
(A) computer control system
(B) digital data system
(C) stochastic control system
(D) adaptive control system

Q13. The initial response when the output is not equal to input is called
(A) Transient response
(B) Error response
(C) Dynamic response
(D) Either of the above

Q14. A good control system has all the following features except
(A) good stability
(B) slow response
(C) good accuracy
(D) sufficient power handling capacity

Q15. In open loop system
(A) the control action depends on the size of the system
(B) the control action depends on system variables
(C) the control action depends on the input signal
(D) the control action is independent of the output

Q16. Which of the following statements is not necessarily correct for open control system ?
(A) Input command is the sole factor responsible for providing the control action
(B) Presence of non-linearities causes malfunctioning
(C) Less expensive
(D) Generally free from problems of non-linearities

Q17. For open control system which of the following statements is incorrect ?
(A) Less expensive
(B) Recalibration is not required for maintaining the required quality of the output
(C) Construction is simple and maintenance easy
(D) Errors are caused by disturbances

Q18. A control system in which the control action is somehow dependent on the output is known as
(A) open loop system
(B) closed loop system
(C) semi closed
(D) None of these

Q19. If one of the poles lies in the imaginary axis of s plane, the system is
(A) stable
(B) unstable
(C) marginary stable
(D) None of these

Q20. If all of the poles lies in the left half s plane, the system is
(A) stable
(B) unstable
(C) marginary stable
(D) None of these