Electrical Machines Brushes are always placed on--------------- , in order to achieve sparkles commutation? either GNA or MNA GNA None of these MNA either GNA or MNA GNA None of these MNA ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase induction motor, the starting torque developed is proportional to supply voltage V 1/V V² 1/V² supply voltage V 1/V V² 1/V² ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If field current is decreased in shunt dc motor, the speed of the motor decreases. None of these increases. remains same. decreases. None of these increases. remains same. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two of supply terminals to a 3 - Φ induction motor get interchanged during re-connection after normal maintenance. When switched on the supply, the motor will not start at all. rotate in the same direction as before maintenance. rotate in direction opposite to that before maintenance. get heated and damaged. not start at all. rotate in the same direction as before maintenance. rotate in direction opposite to that before maintenance. get heated and damaged. 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 and 2 1 alone 1 and 3 2 and 3 1 and 2 1 alone 1 and 3 2 and 3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous machine, if the field flux axis is ahead of the armature field axis in the direction of rotation, the machine operating is synchronous motor. asynchronous motor. synchronous generator. asynchronous generator. synchronous motor. asynchronous motor. synchronous generator. asynchronous generator. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS