UN No. 4 Introduction to Control Systems

Traffic signal used for controlling the traffic across cross road is a

• Closed loop control system

• System

• Open loop control system

• None of these

A person driving car and required to maintain speed the car at 60 km/hr is an example of

• Open loop system

• Closed loop system

• Automatic control system

• Discrete control system

In an open loop control system

• Output is independent of control input

• . Output is dependent on control input

• Only system parameters have effect on the control output

• None of the above

In closed loop control system, with positive value of feedback gain the overall gain of the system will

• decrease

• increase

• be unaffected

• any of the above

Which of the following is an open loop control system?

• Field controlled D.C. motor

• Ward leonard control

• Metadyne

• Stroboscope

An automatic toaster is a loop control system.

• open

• closed

• partially closed

• any of the above

For open control system which of the following statements is incorrect?

• Less expensive

• Recalibration is not required for maintaining the required quality of the output

• Construction is simple and maintenance easy

• Errors are caused by disturbances

A control system in which the control action is somehow dependent on the output isknown as

• Closed loop system

• Semi closed loop system

• Open system

• None of the above

In closed loop control system, with positive value of feedback gain the overall gain ofthe system will

• Decrease

• Increase

• be unaffected

• any of the above

Which of the following is an open loop control system?

• Field controlled D.C. motor

• Ward Leonard control

• Metadyne

• Stroboscope