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Control Systems - Test 1 - Electronics and Telecommunication EngineeringSolve these MCQs carefully and Click the "Check Out" button at the end of the question paper. It would let you know your marks with correct answer key and solutions. Best of Luck!QuestionsTop of Form1. Which of the following is an example of an open-loop system?A.Household refrigeratorB.Respiratory system of an animalC.Stabilisation of air pressure entering into a maskD.Execution of a program by a computer2. If the unti step response of a system is a unit impulse function, then the transfer function of such a system will beA.1B.1 / sC.sD.1 / s2(square)3. The error response of a second order system to a step input is obtained as: E(t) = 1.66 e-st sin (6t + 37). The damping ratio isA.0.4B.0.5C.0.8D.1.04. In a linear system, an input of 5 sin wt produces in output of 10 cos wt. The output corresponding to input 10 cos wt will be equal toA.+5 sin wtB.-5 sin wtC.+20 sin wtD.-20 sin wt5. As compared to a closed loop system an open loop system isA.more stale as well as more accurateB.less stable as well as less accurateC.more stable but less accurateD.less stable but more accurate6. For a gain constant K, the phase-lead compensatorA.reduces the slope of the magnitude curve in the entire range of frequency domainB.decreases the gain cross-over frequencyC.reduce the phase marginD.reduces the resonance peak Mp7. Consider the following properties attributed to stat emodel of a system: (1) State model is unique, (2) State model can be derived from the system transfer function (3) State model can be derived for time variant system. Of these statements:A.1, 2 and 3 are correctB.1 and 2 are correctC.2 and 3 are correctD.1 and 3 are correct8. The open loop transfer function of a unity negative feedback control system is given by G (s) = K (s + 2) / (s + 1) (s - 7). For K > 6, the stability characteristics of the open-loop and closed loop configurations of the system are respectivelyA.stable and stableB.unstable and stableC.stable and unstableD.unstable and unstable9. An electromechanical device which accurates a train of step angular movements in response to a train of input pulses on one to one basis isA.synchro control transformerB.LVDTC.Sstepper motorD.ac tachogenerator10. The correct sequence of steps needed to improve system stability isA.insert derivative action, use negative feedback reduce gainB.reduce gain, use negative feedback, insert derivation actionC.reduce gain, insert derivation action, use negative feedbackD.use negative feedback, reduce gain, insert derivation action

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Control Systems - Test 1 - Electronics and Telecommunication Engineeringpagal, Here is Your resultTotal questions : 10Max. points : 10Your score : 4Percent : 40%Time : 7 minutes, 25 secondsBack to main pageAnswers1. Which of the following is an example of an open-loop system?A.Household refrigeratorB.Respiratory system of an animalC.Stabilisation of air pressure entering into a maskD.Execution of a program by a computerCorrectD. Option D2. If the unti step response of a system is a unit impulse function, then the transfer function of such a system will beA.1WrongB.1 / sC.sD.1 / s2(square)C. Option C3. The error response of a second order system to a step input is obtained as: E(t) = 1.66 e-st sin (6t + 37). The damping ratio isA.0.4B.0.5WrongC.0.8D.1.0C. Option C4. In a linear system, an input of 5 sin wt produces in output of 10 cos wt. The output corresponding to input 10 cos wt will be equal toA.+5 sin wtB.-5 sin wtC.+20 sin wtWrongD.-20 sin wtD. Option D5. As compared to a closed loop system an open loop system isA.more stale as well as more accurateB.less stable as well as less accurateC.more stable but less accurateCorrectD.less stable but more accurateC. Option C6. For a gain constant K, the phase-lead compensatorA.reduces the slope of the magnitude curve in the entire range of frequency domainCorrectB.decreases the gain cross-over frequencyC.reduce the phase marginD.reduces the resonance peak MpA. Option A7. Consider the following properties attributed to stat emodel of a system: (1) State model is unique, (2) State model can be derived from the system transfer function (3) State model can be derived for time variant system. Of these statements:A.1, 2 and 3 are correctB.1 and 2 are correctWrongC.2 and 3 are correctD.1 and 3 are correctC. Option C8. The open loop transfer function of a unity negative feedback control system is given by G (s) = K (s + 2) / (s + 1) (s - 7). For K > 6, the stability characteristics of the open-loop and closed loop configurations of the system are respectivelyA.stable and stableB.unstable and stableC.stable and unstableWrongD.unstable and unstableB. Option B9. An electromechanical device which accurates a train of step angular movements in response to a train of input pulses on one to one basis isA.synchro control transformerWrongB.LVDTC.Sstepper motorD.ac tachogeneratorC. Option C10. The correct sequence of steps needed to improve system stability isA.insert derivative action, use negative feedback reduce gainB.reduce gain, use negative feedback, insert derivation actionC.reduce gain, insert derivation action, use negative feedbackD.use negative feedback, reduce gain, insert derivation actionCorrectD. Option DBack to main page