Electrical Machines The armature of a DC motor is laminated to reduce hysteresis loss. friction and windage loss. copper loss. eddy current loss. hysteresis loss. friction and windage loss. copper loss. eddy current loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum allowable acidity level of power transformer insulating oil is generally taken as 2 mg of KOH / gm. 0.3 mg of KOH / gm. 1 mg of KOH / gm. 0.5 mg of KOH / gm. 2 mg of KOH / gm. 0.3 mg of KOH / gm. 1 mg of KOH / gm. 0.5 mg of KOH / gm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt motor has external resistance Ra and Rf in the armature and field circuits respectively. Armature current at starting can be reduced by keeping Ra maximum and Rf minimum Rf maximum and Ra minimum Ra minimum and Rf minimum Ra maximum and Rf maximum Ra maximum and Rf minimum Rf maximum and Ra minimum Ra minimum and Rf minimum Ra maximum and Rf maximum ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To eliminate 5th harmonic in the induced voltage phase breadth should be 30° 36° 18° 72° 30° 36° 18° 72° ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A smaller air gap in a polyphase induction motor helps to reduce the chance of cogging. reduce the chance of crawling. increase the starting torque. reduce the magnetizing current. reduce the chance of cogging. reduce the chance of crawling. increase the starting torque. reduce the magnetizing current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC Shunt Motor has disadvantage(s) of less expensive. none of above. not suitable for rapidly changing loads. constant speed. less expensive. none of above. not suitable for rapidly changing loads. constant speed. ANSWER DOWNLOAD EXAMIANS APP
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