Synchronous Motors A synchronous motor delivers reactive power when ______ Under excited Normally excited None of the listed here Over excited Under excited Normally excited None of the listed here Over excited ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a synchronous motor it the back e.m.f. generated in the armature at noload is approximately equal to the applied voltage, then the excitation is said to be zero per cent the torque generated is maximum the excitation is said to be hundred per cent the motor is said to be fully loaded the excitation is said to be zero per cent the torque generated is maximum the excitation is said to be hundred per cent the motor is said to be fully loaded ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a 3-phase synchronous motor, the negative phase sequence exists when the motor is under-loaded None of these over-loaded supplied with unbalanced voltage under-loaded None of these over-loaded supplied with unbalanced voltage ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The efficiency of a properly designed synchronous motor will usually fall in range 75 to 80% 60 to 70% 85 to 95% 99 to 99.5% 75 to 80% 60 to 70% 85 to 95% 99 to 99.5% ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor can develop synchronous torque when under loaded while over-excited only at synchronous speed below or above synchronous speed when under loaded while over-excited only at synchronous speed below or above synchronous speed ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors For power factor correction, synchronous motors operate at no-load and under-excited fields normal load with zero excitation no-load and greatly over-excited fields normal load with minimum excitation no-load and under-excited fields normal load with zero excitation no-load and greatly over-excited fields normal load with minimum excitation ANSWER DOWNLOAD EXAMIANS APP
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