Electrical Machines Number of slip rings in 3-phase synchronous motor will be 2 0 3 or 4 1 2 0 3 or 4 1 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A belt-driven cumulatively-compound dc generator is delivering power to the dc mains. If the Belt snaps then the machine will run as a cumulative compounded motor in the same direction cumulative compounded motor in opposite direction differentially compounded motor in the opposite direction differentially compounded motor in the same direction cumulative compounded motor in the same direction cumulative compounded motor in opposite direction differentially compounded motor in the opposite direction differentially compounded motor in the same direction ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Cogging of induction motor occurs at high 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. low voltage and when stator and rotor poles are not equal. high 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. low voltage and when stator and rotor poles are not equal. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Silicon content in steel lamination is kept within 5% as it makes the material brittle. Increases cost. All of these increases hysteresis loss. makes the material brittle. Increases cost. All of these increases hysteresis loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC shunt machine generates 250 V on open circuit at 1000 RPM. Armature resistance is 0.5 Ω, field resistance 250 Ω. When running as a motor takes 4 A at 250 V. Calculate the efficiency when running as a motor taking 40 A at 250 V. Armature reaction weakens the field by 4%. 72.5% 67.5% 82.5% 78.5% 72.5% 67.5% 82.5% 78.5% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor is running at rated speed without any additional resistance in series. If an additional resistance is placedin series, the speed of motor Remains unchanged. Increases. Decreases. Oscillates around the rated speed. Remains unchanged. Increases. Decreases. Oscillates around the rated speed. ANSWER DOWNLOAD EXAMIANS APP
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