Electrical control systems Archives - Page 3 of 10 - MCQ and Quiz for Exams

21. A control system working under unknown random actions is called

Computer control system

Digital data system

Stochastic control system

Adaptive control system

Detailed SolutionA control system working under unknown random actions is called

22. The phase lag produced by transportation relays

Is independent of frequency

Is inversely proportional to frequency

Increases linearly with frequency

Decreases linearly with frequency

Detailed SolutionThe phase lag produced by transportation relays

23. The output of a feedback control system must be a function of

reference and output

reference and input

input and feedback signal

output and feedback signal

Detailed SolutionThe output of a feedback control system must be a function of

24. Which of the following devices are commonly used as error detectors in instruments ?

Vernistats

Microsyns

Resolvers

Any of the above

Detailed SolutionWhich of the following devices are commonly used as error detectors in instruments ?

25. A control system with excessive noise, is likely to suffer from

saturation in amplifying stages

loss of gain

vibrations

oscillations

Detailed SolutionA control system with excessive noise, is likely to suffer from

26. In open loop system

the control action depends on the size of the system

the control action depends on system variables

the control action depends on the input signal

the control action is independent of the output

Detailed SolutionIn open loop system

27. An automatic toaster is a ______ loop control system.

open

closed

partially closed

any of the above

Detailed SolutionAn automatic toaster is a ______ loop control system.

28. In liquid level and electrical system analogy, voltage is considered analogous to

head

liquid flow

liquid flow rate

none of the above

Detailed SolutionIn liquid level and electrical system analogy, voltage is considered analogous to

29. Is not a final control element.

Control valve

Potentiometer

Electropneumatic converter

Servomotor

Detailed SolutionIs not a final control element.

30. If the gain of the critical damped system is increased it will behave as

oscillatory

critically damped

overdamped

underdamped E. none of the above

Detailed SolutionIf the gain of the critical damped system is increased it will behave as

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