Full access allows:
- Solve all tests online without limits;
- Remove all advertisements on website;
- Adding questions to favorite list;
- Save learning progress;
- Save results of practice exams;
- Watching all wrong answered questions.
- Homepage »
- Chief Engineer (Motor Plants (OSV)) »
- Q684 - Electrical, Electronic, & Control Engineering
165. As shown in the illustrated diagnostic setup for locating a shorted field coil of a ten-pole salient pole alternator, if 240 VAC/60 Hz is applied across the brushes, what would be the voltage drop across field coil No.4 if that field coil had shorted turns and the other field coils were free of shorts
A shorted field coil has lower impedance, resulting in a lower voltage drop than a healthy coil. With 240 VAC applied across ten coils, a healthy coil would normally drop 24 VAC. Therefore, a coil with shorted turns must exhibit a voltage drop less than 24 VAC, making 17 VAC the correct answer.
Comments (0)
There are no comments at the moment. If you found an error or think question is incorrect, tell everyone about it
Only signed in users can write comments
Signin