What is the driver/operator frequently required to perform during routine checks?

The driver/operator is frequently required to perform service tests during routine checks. These tests are essential for ensuring that all systems on the vehicle operate correctly and safely. Conducting a service test helps identify any potential issues before they become serious problems, ensuring the vehicle is in optimal working condition.

Service tests typically involve checking various functions and systems, such as steering, brakes, and communication equipment. This proactive approach is vital for maintaining operational readiness and safety standards, aligning with the responsibilities of a driver/operator in the Department of Defense. The other options, while potentially relevant in certain contexts, do not specifically encapsulate the primary focus of routine checks. Vehicle maintenance can encompass various tasks beyond routine checks, hydraulic fluid refill is typically part of maintenance rather than an operational check, and safety drills are separate from the mechanical checks performed during routine vehicle assessments.