Electrical Machines In shunt dc motor the direction of rotation of the motor will reversed. When either field terminals are reversed or armature terminals are reversed. only armature terminals are reversed. none of above. only field terminals are changed. either field terminals are reversed or armature terminals are reversed. only armature terminals are reversed. none of above. only field terminals are changed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generator, lap winding is used in where constant speed is required. high current and low voltage applications. where greater load is connected. high voltage and low current applications. where constant speed is required. high current and low voltage applications. where greater load is connected. high voltage and low current applications. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following load normally needs starting torque more than rated torque? Conveyers. Blowers. Centrifugal pumps. Air compressors. Conveyers. Blowers. Centrifugal pumps. Air compressors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are the methods to reduce the armature reaction and its effects? pole chamfering pole stacking compensating winding All of these pole chamfering pole stacking compensating winding All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If a transformer has turns ratio K, the primary and secondary current are I1 and I2 respectively and magnetizing current and core loss component of no load current Iμ and Iw respectively, then I1 = KI2 + Iμ. I1 = KI2 + Iw. I1 = KI2 + Iw + Iμ.ok I1 = KI2. I1 = KI2 + Iμ. I1 = KI2 + Iw. I1 = KI2 + Iw + Iμ.ok I1 = KI2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If starter is not used with large DC motor for starting, it will draw a starting current many times its rated full load current. provide execessive voltage drop in line. damage the armature and commutator. all of above. draw a starting current many times its rated full load current. provide execessive voltage drop in line. damage the armature and commutator. all of above. ANSWER DOWNLOAD EXAMIANS APP
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