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 1 and 2 3 and 4 1, 2 and 3 All 1 and 2 3 and 4 1, 2 and 3 All ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems In root locus analysis the breakaway and break in points None of these lie on the real axis Always occur in complex conjugate pairs Either lie on the real axis or occur in complex conjugate pairs None of these lie on the real axis Always occur in complex conjugate pairs Either lie on the real axis or occur in complex conjugate pairs ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems The sensor generally used in incremental optical encoder is LCD Photodiode LED Either (a) or (b) LCD Photodiode LED Either (a) or (b) ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems Magnetic amplifier is used for Power amplification Current amplification Frequency amplification Voltage amplification Power amplification Current amplification Frequency amplification Voltage amplification 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 None of these The gain is increased beyond upper critical value The gain is decreased below lower critical value Both A and B None of these The gain is increased beyond upper critical value The gain is decreased below lower critical value Both A and B ANSWER DOWNLOAD EXAMIANS APP
Automatic Control Systems If any term in the first column of a Routh array becomes zero, then Routh criterion cannot be used to determine stability 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 small positive number for zero and completing 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 negative number for zero and complet-ing the array 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 big positive number for zero and completing the array ANSWER DOWNLOAD EXAMIANS APP
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