Electrical control systems

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

Computer control system
Digital data system
Stochastic control system
Adaptive control system

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class="screen-reader-text">A 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

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class="read-more button" href="https://exam.pscnotes.com/mcq/the-phase-lag-produced-by-transportation-relays/#more-45471">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

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control system must be a function of" class="read-more button" href="https://exam.pscnotes.com/mcq/the-output-of-a-feedback-control-system-must-be-a-function-of/#more-45341">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

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class="screen-reader-text">Which 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

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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

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

head
liquid flow
liquid flow rate
none of the above

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to" class="read-more button" href="https://exam.pscnotes.com/mcq/in-liquid-level-and-electrical-system-analogy-voltage-is-considered-analogous-to/#more-45065">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

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48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube
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

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132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube it will behave as" class="read-more button" href="https://exam.pscnotes.com/mcq/if-the-gain-of-the-critical-damped-system-is-increased-it-will-behave-as/#more-44728">Detailed SolutionIf the gain of the critical damped system is increased it will behave as

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