What is the purpose of an annual load test for an aerial device?

• A. To repaint the device.
• B. To verify structural integrity and hydraulic system performance under rated conditions.
• C. To calibrate the color indicators.
• D. To adjust steering alignment.

Answer: (B)

The annual load test is about proving the aerial device can safely carry its rated load and run the hydraulic system under those conditions. It checks structural integrity (no cracks, deflection, or weakness in the booms and joints) and hydraulic performance (proper pressure, smooth control operation, no leaks, and stable, predictable movement). This test is done every year to verify the device will perform safely in real-use situations and to catch developing fatigue or wear before a failure occurs.

Cosmetic work like repainting, calibrating color indicators, or adjusting steering alignment aren’t what this test is designed to verify. Repainting or indicator calibration can be part of routine maintenance, and steering alignment checks are separate maintenance tasks, but they aren’t the primary purpose of the annual load test, which focuses on the ability to support load and operate safely under those conditions.