Electrical Machines The commutator segments of DC machines are made up of hard-drawn copper brass copper copper alloy hard-drawn copper brass copper copper alloy ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor has the highest power factor at full load? Resistance split phase Capacitor run Shaded pole Capacitor start Resistance split phase Capacitor run Shaded pole Capacitor start ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When a short circuit test on a transformer is performed at 25 V, 50 Hz, the drawn current is I1. If the test is performed by 25 V and 25 Hz and power drawn current is I2, then I1 < I2 I1 > I2 I1 = I2 None of these I1 < I2 I1 > I2 I1 = I2 None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A slip ring Induction motor runs at 290 rpm at full load, when connected to 50 Hz supply. Determine the number of poles and slip. P = 50, s = 4.43 %. P = 60, s = 0.96 %. P = 40, s = 5.79 %. P = 20, s = 3.33 %. P = 50, s = 4.43 %. P = 60, s = 0.96 %. P = 40, s = 5.79 %. P = 20, s = 3.33 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Field divertor method of speed control of a DC series motor gives speed above rated one due to reduction of Armature current. Line current. Field current. None of above. Armature current. Line current. Field current. None of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformer cooling and insulating oil must be of low resistivity. low BDV. high viscosity. low viscosity. low resistivity. low BDV. high viscosity. low viscosity. ANSWER DOWNLOAD EXAMIANS APP
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