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1. Which of the following methods is not used for starting an induction motor? a) Adding a resistance in the axillary winding b) Adding a capacitor in the axillary winding c) Shaded pole d) Adding a resistor to the rotor winding

1. Which of the following methods is not used for starting an induction motor? a) Adding a resistance in the axillary winding b) Adding a capacitor in the axillary winding c) Shaded pole d) Adding a resistor to the rotor winding

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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1. Which of the following methods is not used for starting an induction motor? a) Adding a resistance in the axillary winding b) Adding a capacitor in the axillary winding c) Shaded pole d) Adding a resistor to the rotor winding 2. Which of the following motors can run the fastest? a) Three-phase induction motor b) Brushless DC motor c) Synchronous motor d) Universal motor 3. one should be done? To change the operation mode of a three-phase induction motor to generator, which a) Decrease the rotor speed b) Increase the terminal voltage from its initial value c) Decrease the synchronous speed below the motor speed d) Increase the synchronous speed above pull-over torque e) Swap two phases of the three phases 4. Which of the following rotary machines is the most powerful one? a) Switch reluctance machines b) Three-phase induction machines c) Series DC machines d) Synchronous machines e) Universal motors 5. Which of the following machines has the highest efficiency? a) Transformers b) Synchronous machines c) Three-phase induction motors d) Single-phase induction motors e) Universal motors
Transcribed Image Text:1. Which of the following methods is not used for starting an induction motor? a) Adding a resistance in the axillary winding b) Adding a capacitor in the axillary winding c) Shaded pole d) Adding a resistor to the rotor winding 2. Which of the following motors can run the fastest? a) Three-phase induction motor b) Brushless DC motor c) Synchronous motor d) Universal motor 3. one should be done? To change the operation mode of a three-phase induction motor to generator, which a) Decrease the rotor speed b) Increase the terminal voltage from its initial value c) Decrease the synchronous speed below the motor speed d) Increase the synchronous speed above pull-over torque e) Swap two phases of the three phases 4. Which of the following rotary machines is the most powerful one? a) Switch reluctance machines b) Three-phase induction machines c) Series DC machines d) Synchronous machines e) Universal motors 5. Which of the following machines has the highest efficiency? a) Transformers b) Synchronous machines c) Three-phase induction motors d) Single-phase induction motors e) Universal motors
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