Electrical Machines Slot wedges in a dc machine is made up of cast iron. fibre. silicon steel. mild steel. cast iron. fibre. silicon steel. mild steel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following factors improve commutation in a dc machine ? 1. High contact resistance of brushes 2. High inductance of the coils undergoing commutation 3. Shifting of brushes in the direction of rotation for a generator and in the opposite direction For a motor 4. Narrow width for the commutation bars Select the correct answer using the codes given below : Codes : 1, 2 and 4 2, 3 and 4 1 and 3 1, 2, and 3 1, 2 and 4 2, 3 and 4 1 and 3 1, 2, and 3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Universal motors are used in traction food processing cranes All of these traction food processing cranes All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following relation is correct? Xd > Xq. Xd < Xq. None of these Xd = Xq. Xd > Xq. Xd < Xq. None of these Xd = Xq. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Open circuit in a transformer is prefered with high frequency supply rated transformer voltage rated transformer current direct current high frequency supply rated transformer voltage rated transformer current direct current ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If starting current of a 3 - Φ induction motor is 5 times the rated current, while rated slip is 4 %, then ratio of starting torque to full load torque is 1. 0.8. 0.4. 0.6. 1. 0.8. 0.4. 0.6. ANSWER DOWNLOAD EXAMIANS APP
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