Electrical Machines In DC machine shape of armature MMF wave is? Triangular and directed towards main pole. Saddle shape. Triangular and directed towards brush axis. Peaky in nature. Triangular and directed towards main pole. Saddle shape. Triangular and directed towards brush axis. Peaky in nature. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the no-voltage release in a DC motor starter fails to operate on failure of supply, on resumption of supply the motor will not start automatically. get damaged. start automatically without trouble. develop very low starting torque. not start automatically. get damaged. start automatically without trouble. develop very low starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following DC motors has got maximum relieving property? Series. Differentical compound. Cummulative compound. Shunt. Series. Differentical compound. Cummulative compound. Shunt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What does happen if tripled harmonics given to induction motor? Nothing will happen. Will results in open circuit. Fail to start. Will results in short circuit. Nothing will happen. Will results in open circuit. Fail to start. Will results in short circuit. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In above question, find rms line voltage for delta connection? 399 V. 50 V. 230.2 V. 100 V. 399 V. 50 V. 230.2 V. 100 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The following statements relate to compensating winding (CW) and interpole winding (IW) of a dc machine : 1. CW neutralizes the armature reaction under a pole pitch 2. IW is connected in series with armature circuit 3. IW produces mmf in the commutating zone only 4. CWmmf is directed along the brush axis 5. Mmf produced by IW is equal to armature mmf From these, the correct statements are 1, 3, 4, 5 2, 3, 4, 5 1, 2, 3, 4 and 5 2, 3, 4 1, 3, 4, 5 2, 3, 4, 5 1, 2, 3, 4 and 5 2, 3, 4 ANSWER DOWNLOAD EXAMIANS APP
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