Synchronous Motors The pull out torque of a synchronous motor is generally ______ times its full-load torque. 5 to 10 1.25 to 3.5 0.5 6 to 9 5 to 10 1.25 to 3.5 0.5 6 to 9 ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When the field of a synchronous motor is under-excited, the power factor will be zero lagging unity leading zero lagging unity leading ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor delivers reactive power when ______ Normally excited Over excited Under excited None of the listed here Normally excited Over excited Under excited None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors For reciprocating compressor, the synchronous motor is designed to have pull in torque of about ______ times the full load torque. 6 2 5 0.5 6 2 5 0.5 ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor connected to infinite bus-bars has at constant full load, 100% excitation and unity power factor. On changing the excitation only, the armature current will have leading power factor with under-excitation lagging power factor with over-excitation no change of power factor leading power factor with over-excitation leading power factor with under-excitation lagging power factor with over-excitation no change of power factor leading power factor with over-excitation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When a synchronous motor is pulled out of synchronism, the stator current ________ Is decreased too much Is increased too much Become zero Remains unchanged Is decreased too much Is increased too much Become zero Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS