Electrical Machines A small air gap in poly phase induction motor helps to reduce chance of cogging. reduce magnetizing current. reduce chance of crawling. increase starting torque. reduce chance of cogging. reduce magnetizing current. reduce chance of crawling. increase starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformer cooling and insulating oil must be of low resistivity. low viscosity. high viscosity. low BDV. low resistivity. low viscosity. high viscosity. low BDV. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A shunt generator is running at 1000 rpm. If flux is reduced by half, then what is the new speed? 0. 2000. 1000. 500. 0. 2000. 1000. 500. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For pure resistive load what is the armature reaction? demagnetization magnetization All of these cross magnetization demagnetization magnetization All of these cross magnetization ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature of DC machine is made of silicon steel. insulating material. conducting material. non-ferrous material. silicon steel. insulating material. conducting material. non-ferrous material. 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 Decreases. Remains unchanged. Increases. Oscillates around the rated speed. Decreases. Remains unchanged. Increases. Oscillates around the rated speed. ANSWER DOWNLOAD EXAMIANS APP
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