What is an essential pre-operation step for a boom lift?

Filling out a safety inspection checklist is an essential pre-operation step for a boom lift because it ensures that the equipment is safe to use before operation begins. This checklist typically includes checking critical components such as the hydraulic system, outriggers, safety devices, and other operational features to confirm that they are functioning properly and free from defects. By following this step, operators can identify any potential issues that could cause accidents or malfunctions during use, thereby enhancing safety for both the operator and surrounding personnel.

The other options involve actions that compromise safety. Starting the engine without checks neglects the necessary precautions to ensure the machine is safe to operate. Adjusting controls randomly could lead to unsafe maneuvers, and operating without any checks completely disregards the essential safety procedures needed to prevent accidents.