Electrical Machines The slot edges in a DC machine are made of Mild steel. Cast iron. Silicon steel. Fibre. Mild steel. Cast iron. Silicon steel. Fibre. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following generators are used in arc welding? cumulative compound generators shunt generators differential compound generators series generators cumulative compound generators shunt generators differential compound generators series generators ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machines, the interpoles are provided to counteract the reactance voltage and the cross-magnetizi to counteract demagnetizing effect of armature mmf in commutating zone. to make commutation spark less. both (B) and (C). to counteract the reactance voltage and the cross-magnetizi to counteract demagnetizing effect of armature mmf in commutating zone. to make commutation spark less. both (B) and (C). ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines It is advisable to start a DC series motor with some load to Limit the current. Limit the speed. Avoid sparking. Limit the flux. Limit the current. Limit the speed. Avoid sparking. Limit the flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements : 1. interpole windings are connected in series with armature windings 2. polarity of interpoles must be the same as that of the main poles in advance 3. distortion of the main field under the pole shoes is not affected by the use of interpoles From above, the correct answer is 1 alone 2 and 3 1 and 3 1 and 2 1 alone 2 and 3 1 and 3 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 3-phase induction motor, if the supply voltage and frequency are reduced by the same ratio, then slip at which maximum torque occurs is less and maximum torque increases less and maximum torque decreases more and maximum torque remains constant more and maximum torque decreases less and maximum torque increases less and maximum torque decreases more and maximum torque remains constant more and maximum torque decreases ANSWER DOWNLOAD EXAMIANS APP
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