Marine Electrical Systems USCG Question #1051 (Set 35)

Referring to the illustration of possible brush holder mounting configurations, which figure is the correct method of configuring the brushholders on a DC generator? EL-0057

USCG Exam Illustration EL-0057
USCG Examination Diagram: Illustration EL-0057
Official USCG Answer & Rule Citation

Correct Answer: Option C — C

Figure C correctly illustrates the staggered brush holder arrangement on marine DC generators. This design ensures that brushes track across overlapping paths on the commutator surface, preventing uneven wear grooves and maintaining optimal electrical contact.

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