Related InterviewSolutions

• The angles of asymptotes of the root loci of the equation s^3+5s^2+(K+2)s+K=0 are:(a) 0° and 270°(b) 0° and 180°(c) 90° and 270°(d) 90° and 180°I have been asked this question in a job interview.Question is taken from Construction of Root Loci in portion The Root Locus Technique of Control Systems
• The OLTF of a unity feedback system is K(s+2)(s+4)/(s+5)(s+6) the angle of arrival of the root loci as s =-2, and s =-4 respectively are:(a) 0°,180°(b) 180°,0°(c) 90°,180°(d) 180°, 90°This question was posed to me during an interview.My doubt is from Construction of Root Loci topic in division The Root Locus Technique of Control Systems
• The intersection of asymptotes of root loci of a system with open loop transfer function G(s)H(s) = K/s(s+1)(s+3) is(a) 1.44(b) 1.33(c) -1.44(d) -1.33The question was posed to me during a job interview.This intriguing question comes from Construction of Root Loci in division The Root Locus Technique of Control Systems
• The open loop transfer function of the feedback control system is given by G(s) =K(s+3)/s(s+4)^2(s+5)(s+6). The number of asymptotes and the centroid of asymptotes of the root loci of closed loop system is(a) 4 and (-4,0)(b) 3 and (-12,0)(c) -4 and (-4,0)(d) -3 and (-12,0)I got this question during an interview.This interesting question is from Construction of Root Loci topic in division The Root Locus Technique of Control Systems
• Number of roots of characteristic equation is equal to the number of ______________(a) Branches(b) Root(c) Stem(d) PolesI have been asked this question during a job interview.This key question is from The Root Locus Concepts in division The Root Locus Technique of Control Systems
• Consider the following statements regarding root loci:(a) All root loci start from the respective poles of G(s) H(s)(b) All root loci end at the respective zeros of G(s) H(s) or go to infinity(c) The root loci are symmetrical about the imaginary axis of the s-plane(d) All root loci start and end from the respective poles of G(s) H(s) or go to infinityI got this question during an interview.I'd like to ask this question from The Root Locus Concepts in chapter The Root Locus Technique of Control Systems
• The addition of open loop poles pulls the root locus towards:(a) The right and system becomes unstable(b) Imaginary axis and system becomes marginally stable(c) The left and system becomes unstable(d) The right and system becomes unstableThe question was asked in an online interview.Asked question is from The Root Locus Concepts topic in division The Root Locus Technique of Control Systems
• While increasing the value of gain K, the system becomes(a) Less stable(b) More stable(c) Unstable(d) Absolute stableThe question was posed to me in a job interview.This question is from The Root Locus Concepts in division The Root Locus Technique of Control Systems
• The main objective of drawing root locus plot is :(a) To obtain a clear picture about the open loop poles and zeroes of the system(b) To obtain a clear picture about the transient response of feedback system for various values of open loop gain K(c) To determine sufficient condition for the value of ‘K’ that will make the feedback system unstable(d) Both b and cI had been asked this question in exam.Question is taken from The Root Locus Concepts topic in chapter The Root Locus Technique of Control Systems
• Which one of the following statements is not correct?(a) Root loci can be used for analyzing stability and transient performance(b) Root loci provide insight into system stability and performance(c) Shape of the root locus gives idea of type of controller needed to meet design specification(d) Root locus can be used to handle more than one variable at a timeI have been asked this question in an online interview.This question is from The Root Locus Concepts in chapter The Root Locus Technique of Control Systems