What is the effect of temperature on the specific gravity of lead acid batteries?

Correct Answer: Option D — Higher temperature results in a lower specific gravity reading.

Electrolyte density is temperature-dependent. As temperature increases, the electrolyte expands, reducing its density and resulting in a lower specific gravity reading. Conversely, lower temperatures cause the electrolyte to contract, increasing density. Hydrometer readings must be temperature-corrected to obtain an accurate assessment of the battery's state of charge.