Automatic Control Systems A conditionally stable system is stable for the value of gain between two critical values. It is unstable if None of these The gain is decreased below lower critical value The gain is increased beyond upper critical value Both A and B None of these The gain is decreased below lower critical value The gain is increased beyond upper critical value Both A and B ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems M circles are symmetrical with respect to Real and imaginary axis M = 1 straight line and real axis M = 1 straight line and imaginary axis M = 1 straight line Real and imaginary axis M = 1 straight line and real axis M = 1 straight line and imaginary axis M = 1 straight line ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems Nichol’s chart is symmetric about – 180° axis. False True False True ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems A system is highly oscillatory if Gain margin is high and phase margin is 180° Gain margin is high Gain margin is close to 1 or phase margin is zero Gain margin is close to 1 Gain margin is high and phase margin is 180° Gain margin is high Gain margin is close to 1 or phase margin is zero Gain margin is close to 1 ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems If any term in the first column of a Routh array becomes zero, then Routh criterion can be used by substituting a big positive number for zero and completing the array Routh criterion cannot be used to determine stability Routh criterion can be used by substituting a small positive number for zero and completing the array Routh criterion can be used by substituting a small negative number for zero and complet-ing the array Routh criterion can be used by substituting a big positive number for zero and completing the array Routh criterion cannot be used to determine stability Routh criterion can be used by substituting a small positive number for zero and completing the array Routh criterion can be used by substituting a small negative number for zero and complet-ing the array ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems Which control action can never be used alone? Integral Both (b) and (c) Proportional Derivative Integral Both (b) and (c) Proportional Derivative ANSWER DOWNLOAD EXAMIANS APP
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