Automatic Control Systems Which of the following features is not associated with Nichols chart? (0 dB, -180°) point on Nichols chart represent critical Point (-1, 0) M loci are centred about (0 dB, -180°) point The frequency at intersection of G(j?) locus and M = +3 dB locus gives bandwidth of closed loop system It is symmetric about -180° (0 dB, -180°) point on Nichols chart represent critical Point (-1, 0) M loci are centred about (0 dB, -180°) point The frequency at intersection of G(j?) locus and M = +3 dB locus gives bandwidth of closed loop system It is symmetric about -180° ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems Which of the following can be used as a rotating amplifier in a control system? 1. Amplidyne 2. Separately excited dc generator 3. Synchro 4. Self excited dc generator 3 and 4 All 1, 2 and 3 1 and 2 3 and 4 All 1, 2 and 3 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems The complicated shapes in the polar plots are only due to time constants in the numerator of transfer functions. True False True False ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems In a two phasor servomotor, the direction of rotation of the rotating field depends on Phase relation of voltages applied to the two stator windings Magnitudes of voltages applied to the two stator windings None of these Both magnitude and phase relationship of voltages applied to the two stator windings Phase relation of voltages applied to the two stator windings Magnitudes of voltages applied to the two stator windings None of these Both magnitude and phase relationship of voltages applied to the two stator windings ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems Which control action can never be used alone? Both (b) and (c) Derivative Integral Proportional Both (b) and (c) Derivative Integral Proportional ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems Nichols chart consists of Constant magnitude loci Magnitude and phase angle loci in log-magnitude versus phase diagram None of these Constant phase angle loci Constant magnitude loci Magnitude and phase angle loci in log-magnitude versus phase diagram None of these Constant phase angle loci ANSWER DOWNLOAD EXAMIANS APP
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