Which items are checked during a pre-use inspection of an aerial device?

• A. Structural integrity, pins/bolts/cotter pins, hydraulic hoses for leaks, level indicators, outriggers condition, platform rails, controls and alarms, and emergency lowering mechanism.
• B. Only visual check of the ladder and hoses
• C. Testing of all electrical circuits with a multimeter
• D. Refueling the hydraulic reservoir

Answer: (C)

A pre-use inspection focuses on safety-critical systems and the device’s ability to operate reliably. You systematically verify structural integrity and fasteners, ensuring pins, bolts, and cotter pins are in place and secure. You check the hydraulic hoses for leaks or wear, confirm the level indicators show proper levels, inspect outriggers for proper condition and locking, and review platform rails. You also test the controls and alarms and ensure the emergency lowering mechanism works. This thorough check catches issues that could lead to failure or hazards once the equipment is in use, which a quick visual glance or partial checks would miss.

Visual checks alone aren’t enough because many problems aren’t visible at a glance, and routine pre-use isn’t the time for comprehensive electrical testing with a multimeter, which is more part of maintenance or diagnostic procedures. Refueling the hydraulic reservoir isn’t a standard pre-use task either; fluid levels should be verified and topped per procedure, but simply refilling during a pre-use check isn’t the intended practice.