Marine Electrical Systems USCG Q#223 (Set 8)

What should be done when correcting specific gravity readings of a lead-acid battery for existing temperature conditions?

Official USCG Answer & Rule Citation

Correct Answer: Option A — add 4 correction points for each 10°F the battery temperature is above 80°F

Standard temperature correction adds approximately four points (0.004 specific gravity) for every 10°F the electrolyte temperature exceeds the 80°F baseline, compensating for fluid expansion and density reduction.

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