Electrical Machines Hopkinson test is conducted under which of the following condition? half load no load full load any of the above half load no load full load any of the above ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum efficiency will occur, when copper loss is_______to iron loss? any of the above greater than equal to less than any of the above greater than equal to less than ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines φA 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 speed when running as a motor taking 40 A at 250 V. Armature reaction weakens the field by 4%. 920 RPM 940 RPM 960 RPM 970 RPM 920 RPM 940 RPM 960 RPM 970 RPM ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a resistance split phase motor, what is the range of torque angle? 70° to 85° 0° 25° to 30° 90° 70° to 85° 0° 25° to 30° 90° ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When excitation is increased (over excitation), the synchronous generator operates at any of the above. lagging power factor. unity power factor. leading power factor. any of the above. lagging power factor. unity power factor. leading power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Lamination of core are generally made of cast iron. stainless steel. silicon steel. carbon. cast iron. stainless steel. silicon steel. carbon. ANSWER DOWNLOAD EXAMIANS APP
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