Electrical Machines For the purpose of starting an induction motor, star/delta switch is an equivalent to auto transformer of ratio 57.7% 50% 66.3% 33.3% 57.7% 50% 66.3% 33.3% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To eliminate the 5th harmonic in the induced voltages their respective pitch factor angle should be 72° 18° 30° 36° 72° 18° 30° 36° ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following represents the pitch factor? Cos (α/2) Cos α Cos α² sin (α/2) Cos (α/2) Cos α Cos α² sin (α/2) ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Example of double excited machine is DC Shunt Motor Both are correct. Synchronous motor. None of these DC Shunt Motor Both are correct. Synchronous motor. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines which of the following type of brush and their application is/are correct All of these carbon brush → normal ratings electro graphite → large ratings copper graphite → low voltage high current density All of these carbon brush → normal ratings electro graphite → large ratings copper graphite → low voltage high current density ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In synchronous motor, the damper winding is generally used to prevent hunting and provide the starting torque. reduce noise level only. provide starting torque only. reduce the eddy currents. prevent hunting and provide the starting torque. reduce noise level only. provide starting torque only. reduce the eddy currents. ANSWER DOWNLOAD EXAMIANS APP
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