Related InterviewSolutions

• The constant M circle for M=1 is the(a) straight line x=-1/2(b) critical point (-1j0)(c) circle with r= 0.33(d) circle with r=0.67I had been asked this question during an interview for a job.Query is from Polar Plots topic in portion Frequency Response Analysis of Control Systems
• Assertion (A): All the systems which exhibit overshoot in transient response will also exhibit resonance peak in frequency response.Reason (R): Large resonance peak in frequency response corresponds to a large overshoot in transient response.(a) Both A and R are true and R is the correct explanation of A(b) Both A and R are true and R is not the correct explanation of A(c) A is true but R is false(d) A is false but R is trueI got this question during an internship interview.The origin of the question is Correlation between Time and Frequency Response in portion Frequency Response Analysis of Control Systems
• Scientist Nyquist have contribution in:(a) Asymptotic plots(b) Polar plots(c) Root locus technique(d) Constant M and n circleI got this question in an interview.I need to ask this question from Frequency Response in section Frequency Response Analysis of Control Systems
• OLTF contains one zero in right half of s-plane then(a) Open loop system is unstable(b) Close loop system is unstable(c) Close loop system is unstable for higher gain(d) Close loop system is stableI have been asked this question in an online quiz.My enquiry is from Bode Plots topic in division Frequency Response Analysis of Control Systems
• The transfer function of a phase-lead controller is given by(a) (1+aTs)/(1+Ts) , a>1 T>0(b) (1+aTs)/(1+Ts) , a0(c) (1-aTs)/(1+Ts) , a>1 T>0(d) (1±Ts)/(1+Ts) , a0This question was posed to me in unit test.Enquiry is from Experimentation of Transfer Function in division Frequency Response Analysis of Control Systems
• Which one of the following statements is correct for gain margin and phase margin of two closed-loop systems having loop functions G(s) H(s) and exp(-s) G(s) H(s)?(a) Both gain and phase margins of the two systems will be identical(b) Both gain and phase margins of G(s) H(s) will be more(c) Gain margins of the two systems are the same but phase margins of G(s) H(s) will be more(d) Phase margins of the two systems are the same but gain margin of G(s) H(s) will be lessI had been asked this question in examination.This interesting question is from Correlation between Time and Frequency Response in division Frequency Response Analysis of Control Systems
• The unit circle of the Nyquist plot transforms into 0dB line of the amplitude plot of the Bode diagram at(a) 0 frequency(b) Low frequency(c) High frequency(d) Any frequencyThis question was posed to me in an interview.My doubt stems from Polar Plots topic in section Frequency Response Analysis of Control Systems
• For all-pass systems:(a) Poles must lie on right of the s-plane(b) Zeroes must lie on the left of s-plane(c) Poles must lie on the left and zeroes on the mirror image of the pole can be on the right(d) None of the mentionedThis question was posed to me during an interview.Enquiry is from All-pass and Minimum-phase Systems in chapter Frequency Response Analysis of Control Systems
• For a stable closed loop system, the gain at phase crossover frequency should always be:(a) < 20 dB(b) < 6 dB(c) > 6 dB(d) > 0 dBThis question was posed to me in unit test.The origin of the question is Frequency Response topic in portion Frequency Response Analysis of Control Systems
• The gain margin in dBs of a unity feedback control system whose open loop transfer function, G(s) H(s) =1/s(s+1) is(a) 0(b) 1(c) -1(d) ∞I have been asked this question by my school teacher while I was bunking the class.I'd like to ask this question from Correlation between Time and Frequency Response topic in division Frequency Response Analysis of Control Systems