Acid battery hydrometer is used to measure the specific gravity of an acid. Is this statement True or False(A) True(B) False

Answer: (A) True
An acid battery hydrometer is a device specifically designed to measure the specific gravity (or relative density) of the electrolyte solution in lead-acid batteries.
Key Details:
1. Specific Gravity:
o Specific gravity is the ratio of the density of a substance to the density of water. For a lead-acid battery, the electrolyte is a solution of sulfuric acid and water.
o The specific gravity of the electrolyte provides crucial information about the battery's charge level.
2. How the Hydrometer Works:
o The hydrometer typically consists of a glass or plastic tube with a float inside that rises or sinks depending on the density of the solution.
o When the battery is fully charged, the sulfuric acid concentration is higher, and the specific gravity is typically around 1.265–1.285.
o When the battery discharges, sulfuric acid is consumed, and water is formed, reducing the specific gravity of the solution.
3. Importance in Battery Maintenance:
o Measuring the specific gravity allows technicians to determine the state of charge or health of the battery.
o It helps detect issues such as overcharging, undercharging, or electrolyte imbalance.
Since an acid battery hydrometer measures the specific gravity of the electrolyte in a lead-acid battery, the statement is True.