Electrical Machines The armature voltage control is considered suitable for a DC motor driven at constant speed. power. torque. current. speed. power. torque. current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following DC motors has almost constant speed over their full load range? none of these. Series. Shunt. Compound (cummolative). none of these. Series. Shunt. Compound (cummolative). ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The noise resulting from vibrations of lamination set by magnetic forces, is termed as boo. hum. magnetostriction. zoom. boo. hum. magnetostriction. zoom. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In Ward-Leonard system, the lower limit of the speed imposed by Field resistance. Armature resistance. None of above. Residual magnetism of the generator. Field resistance. Armature resistance. None of above. Residual magnetism of the generator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the excitation is critical, the power factor of the alternator is lagging power factor. None of these leading power factor. unity power factor. lagging power factor. None of these leading power factor. unity power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 3 - Φ wound rotor induction motor the short circuit gear is used to short circuit the None of these starting resistance in the starter. stator phases of the motor. rotor at slip rings. None of these starting resistance in the starter. stator phases of the motor. rotor at slip rings. ANSWER DOWNLOAD EXAMIANS APP
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