🔍 Key Concepts

• Specific gravity and state of charge of lead-acid batteries • Effect of temperature on hydrometer readings • Proper testing procedure after adding water to cells

💭 Think About

• Think about what happens to the electrolyte density when a battery is charged versus discharged. Does the float go higher or lower? • If you add water to a cell and immediately test, has the electrolyte fully mixed? Would that make your reading more or less reliable? • How does temperature generally affect density readings of liquids, and why might that matter for hydrometers?

✅ Before You Answer

• Identify which options confuse high float vs low float with charged/discharged conditions • Check which statement ignores the need for mixing time after adding water • Consider which choice recognizes that temperature corrections are often required for accurate instrument readings