An automatic toaster is a ___________ loop control system?

Related Mcqs:

1. A closed loop system is distinguished from open loop system by which of the following ?

   A. Servomechanism
   B. Feedback
   C. Output pattern
   D. Input pattern

2. In an automatic control system which of the following elements is not used ?

   A. Error detector
   B. Final control element
   C. Sensor
   D. Oscillator

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. In an open loop control system____________?

   A. Output is independent of control input
   B. Output is dependent on control input
   C. Only system parameters have effect on the control output
   D. None of the above

5. Which of the following is an open loop control system ?

   A. Field controlled D.C. motor
   B. Ward leonard control
   C. Metadyne
   D. Stroboscope

6. 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

7. _______________is a closed loop system?

   A. Auto-pilot for an aircraft
   B. Direct current generator
   C. Car starter
   D. Electric switch

8. On which of the following factors does the sensitivity of a closed loop system to gain changes and load disturbances depend ?

   A. Frequency
   B. Loop gain
   C. Forward gain
   D. All of the above

9. _______________is an open loop control system?

   A. Ward Leonard control
   B. Field controlled D.C. motor
   C. Stroboscope
   D. Metadyne

10. 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