Automatic Control Systems Which of the following features is not associated with Nichols chart? M loci are centred about (0 dB, -180°) point It is symmetric about -180° The frequency at intersection of G(j?) locus and M = +3 dB locus gives bandwidth of closed loop system (0 dB, -180°) point on Nichols chart represent critical Point (-1, 0) M loci are centred about (0 dB, -180°) point It is symmetric about -180° The frequency at intersection of G(j?) locus and M = +3 dB locus gives bandwidth of closed loop system (0 dB, -180°) point on Nichols chart represent critical Point (-1, 0) ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems A conditionally stable system is stable for the value of gain between two critical values. It is unstable if The gain is increased beyond upper critical value The gain is decreased below lower critical value None of these Both A and B The gain is increased beyond upper critical value The gain is decreased below lower critical value None of these Both A and B ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems The addition of a pole to the open loop transfer function pulls the root locus Towards right or left depending on the position of new pole To the left and making the system more stable To the right None of these Towards right or left depending on the position of new pole To the left and making the system more stable To the right None of these ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems Which control action can never be used alone? Derivative Both (b) and (c) Integral Proportional Derivative Both (b) and (c) Integral Proportional ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems For a stable system having two or more gain crossover frequencies the phase margin is measured at the highest crossover frequency. False True False True ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems Which of the following is used to obtain output position in a position control system? Strain gauge Load cell Thermistor Synchro Strain gauge Load cell Thermistor Synchro ANSWER DOWNLOAD EXAMIANS APP
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