Final answer:
Tech A is correct that the surface of the battery can be cleaned with baking soda and water, while Tech B is correct that the electrolyte level should be below the top surface of the plates.
Step-by-step explanation:
Tech A is correct. The surface of the battery can be cleaned with baking soda and water. Baking soda, also known as sodium bicarbonate, can help neutralize any acid present on the battery surface, preventing corrosion. Mixing baking soda with water forms a mild abrasive paste that can be used to remove dirt and grime from the battery surface.
Tech B is also correct. The electrolyte level in a lead-acid battery should be below the top surface of the plates. This is because during the operation of the battery, some of the water in the electrolyte can be converted into hydrogen and oxygen gases through a process called electrolysis. If the electrolyte level is too high, there is a risk of the gases escaping, which can lead to loss of electrolyte and potential damage to the battery.