Electrical Machines Transformer cooling and insulating oil must be of low viscosity. low BDV. low resistivity. high viscosity. low viscosity. low BDV. low resistivity. high viscosity. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The principle of operation of a 3 - Φ induction motor is almost similar to that of transformer with secondary short circuited. capacitor start induction motor. repulsion start induction motor. synchronous motor. transformer with secondary short circuited. capacitor start induction motor. repulsion start induction motor. synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The no load and full load speed of DC motor are 1400 rpm and 1200 rpm respectively. What is the percentage speed regulation of the motor ? 16.67%. 15.30%. 18.25%. 14.28%. 16.67%. 15.30%. 18.25%. 14.28%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The back emf produced in a dc motor depends on Z. P and Z. P. none of these. Z. P and Z. P. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Unbalance 3 - Φ stator currents cause heating of rotor. vibrations. double frequency currents in the rotor. All of these heating of rotor. vibrations. double frequency currents in the rotor. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines 1 KVA, 230 V, 50 Hz, single phase transformer has an eddy current loss of 30 watts. The eddy current loss when the transformer is excited by a dc source of same voltage will be 30 W more than 30 W zero watt less than 30 W 30 W more than 30 W zero watt less than 30 W ANSWER DOWNLOAD EXAMIANS APP
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