Synchronous Motors Power factor of a synchronous motor is unity when The armature current is zero None of the listed here The armature current is maximum The armature current is minimum The armature current is zero None of the listed here The armature current is maximum The armature current is minimum ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a synchronous motor, the forced vibrations will be maximum when driving A centrifugal blower Any of the listed here A centrifugal pump A reciprocating air compressor A centrifugal blower Any of the listed here A centrifugal pump A reciprocating air compressor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When a synchronous motor is on no load, the torque angle is about ________ 0° electrical 90° electrical 45° electrical 30° electrical 0° electrical 90° electrical 45° electrical 30° electrical ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous capacitor is an over excited motor running at ________ No load Full load Half full load None of the listed here No load Full load Half full load None of the listed here 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 leading power factor with over-excitation no change of power factor leading power factor with under-excitation lagging power factor with over-excitation leading power factor with over-excitation no change of power factor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor runs at only one speed because it ______ Is a doubly fed machine Has a damper winding Has no losses None of the listed here Is a doubly fed machine Has a damper winding Has no losses None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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