Marine Electrical Systems USCG Question #225 (Set 8)

What statement is true concerning the specific gravity of the electrolyte solution in a lead acid battery?

Official USCG Answer & Rule Citation

Correct Answer: Option C — the specific gravity gives an indication of the state of charge of the battery

During discharge, sulfate ions bond to the plates, reducing electrolyte density. During charge, they return to solution, making specific gravity the definitive metric for assessing remaining battery capacity.

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