Question 336Electricity & Electronics - Assistant Engineer

The correct answer is A) The initial charging rate should be no greater than 100% of the battery amp-hour rating. This is correct because the charging rate for a lead-acid battery should not exceed the battery's amp-hour rating. Exceeding this rate can damage the battery and cause safety issues. Charging at a rate higher than 100% of the battery's amp-hour rating is not recommended, as it can lead to overheating, gassing, and potentially even an explosion. The other options are incorrect because: B) The source of power should be 12.6-13.8 volts per 12V battery, not 2 volts per cell; C) 100 amps for one hour would be an excessively high rate for a 100 amp-hour battery; and D) 90°F is too high for the electrolyte temperature, which should be kept below 120°F during charging.