Electrical Machines If the field winding connection of DC shunt motor is changed motor will not run. It will run in same direction. It will run in opposite direction. motor will become slow. motor will not run. It will run in same direction. It will run in opposite direction. motor will become slow. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following statements is/are correct ? Both A and B. None of these Inter pole winding will act in interpolar region. Compensating winding will act under the pole. Both A and B. None of these Inter pole winding will act in interpolar region. Compensating winding will act under the pole. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The use of higher flux density in the transformer design reduces the weigh per KVA None of these has no relation with the weight of transformer increases the weigh per KVA reduces the weigh per KVA None of these has no relation with the weight of transformer increases the weigh per KVA ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Oil is provided in an oil filled transformer for both cooling and insulation. lubrication. cooling. insulating. both cooling and insulation. lubrication. cooling. insulating. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 6 pole, 50 Hz IM has a rotor speed of 987 rpm find rotor frequency? 0.65 Hz. 0.75 Hz. 60 Hz. 0.70 Hz. 0.65 Hz. 0.75 Hz. 60 Hz. 0.70 Hz. 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 3 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 ANSWER DOWNLOAD EXAMIANS APP
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