According to NFPA standards, how often should aerial apparatus be tested?

The correct answer is based on NFPA 1911, which establishes the standards for the maintenance, testing, and inspection of fire department aerial apparatus. According to these standards, aerial apparatus must undergo a thorough inspection and test annually to ensure they are functioning properly and are safe for use in emergency situations. This annual testing helps identify any potential issues that could affect the performance of the apparatus, thus ensuring the safety of both fire department personnel and the communities they serve. Regular annual inspections are critical in maintaining the reliability and readiness of aerial equipment.