Electrical Machines Cogging of induction motor occurs at low voltage and when stator and rotor poles are not equal. high voltage and when stator and rotor poles are equal. low voltage and when stator and rotor poles are equal. high voltage and when stator and rotor poles are not equal. low voltage and when stator and rotor poles are not equal. high voltage and when stator and rotor poles are equal. low voltage and when stator and rotor poles are equal. high voltage and when stator and rotor poles are not equal. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In escalator which motor is used? 1 - φ IM. DC shunt motor. 3 - φ IM. Universal motor. 1 - φ IM. DC shunt motor. 3 - φ IM. Universal motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the shunt resistance component equivalent circuit obtained by no load test of an induction motor representative of ? both 1 and 2 windage and friction loss Copper loss core loss only both 1 and 2 windage and friction loss Copper loss core loss only ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor is more expensive for same KW output rating ? Synchronous motor. DC Shunt Motor AC single phase motor. Induction motor. Synchronous motor. DC Shunt Motor AC single phase motor. Induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Unbalance 3 - Φ stator currents cause vibrations. All of these double frequency currents in the rotor. heating of rotor. vibrations. All of these double frequency currents in the rotor. heating of rotor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Interpoles in a DC motor must be Shunt excited and should have the same polarity as that of the behind main pole in the direction of rotation of armature. Series excited and should have the same polarity as that of the ahead main pole in the direction of rotation of armature. Shunt excited and should have the same polarity as that of the ahead main pole in the direction of rotation of armature. Series excited and should have the same polarity as that of the behind main pole in the direction of rotation of armature. Shunt excited and should have the same polarity as that of the behind main pole in the direction of rotation of armature. Series excited and should have the same polarity as that of the ahead main pole in the direction of rotation of armature. Shunt excited and should have the same polarity as that of the ahead main pole in the direction of rotation of armature. Series excited and should have the same polarity as that of the behind main pole in the direction of rotation of armature. ANSWER DOWNLOAD EXAMIANS APP
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