Red Seal Agricultural Equipment Technician Practice Exam

What may indicate that an agricultural battery needs replacement?

1. Physical swelling and corrosion

2. Long warranty period

3. High voltage output

4. Consistent charging

The correct answer is: Physical swelling and corrosion

A battery that shows physical swelling and corrosion is a strong indicator that it may need replacement. Swelling typically occurs due to gas build-up inside the battery, which can happen due to overcharging, excessive heat, or internal failure. This physical change can compromise the integrity of the battery, potentially leading to leaks and diminished performance. Corrosion, often visible around terminals and connectors, suggests a chemical reaction that can impair the battery's ability to hold charge and deliver power effectively. In contrast, a long warranty period does not directly signify the current condition of a battery; it primarily reflects the manufacturer's confidence in their product. High voltage output could suggest that the battery is functioning well at the moment, but it does not guarantee long-term reliability or performance. Likewise, consistent charging may indicate normal operation but is not an absolute sign of battery health. Thus, physical signs like swelling and corrosion are critical indicators that a battery should be evaluated for replacement.