Any externally introduced signal affecting the controlled output is called a______________?

Related Mcqs:

1. signal will become zero when the feedback signal and reference signs are equal?

   A. Input
   B. Actuating
   C. Feedback
   D. Reference

2. A signal other than the reference input that tends to affect the value of controlled variable is known as_________________?

   A. disturbance
   B. command
   C. control element
   D. reference input

3. Static error coefficients are used as a measure of the effectiveness of closed loop systems for specified ___________ input signal?

   A. acceleration
   B. velocity
   C. position
   D. all of the above

4. A control system in which the control action is somehow dependent on the output is known as____________?

   A. Closed loop system
   B. Semiclosed loop system
   C. Open system
   D. None of the above

5. The initial response when tne output is not equal to input is called_____________?

   A. Transient response
   B. Error response
   C. Dynamic response
   D. Either of the above

6. The output of a feedback control system must be a function of_________________?

   A. reference and output
   B. reference and input
   F. input and feedback signal
   D. output and feedback signal

7. In a control system the output of the controller is given to_____________?

   A. final control element
   B. amplifier
   C. comparator
   D. sensor
   F. none of the above

8. Which of the following is the output of a thermocouple ?

   A. Alternating current
   B. Direct current
   C. A.C. voltage
   D. D.C. voltage
   F. None of the above

9. If a step function is applied to the input of a system and the output remains below a certain level for all the time, the system is_____________?

   A. not necessarily stable
   B. stable
   C. unstable
   D. always unstable
   F. any of the above

10. A.C. servomotor resembles_____________?

    A. two phase induction motor
    B. Three phase induction motor
    C. direct current series motor
    D. universal motor