Which of the following is a responsibility of the PIC during an engine run-up?

The responsibility of directing prop wash away from personnel during an engine run-up is crucial for ensuring safety. When an aircraft's engines are running at higher power settings, especially during a run-up, the propeller produces significant airflow, which can create a strong prop wash. This airflow can potentially disturb loose objects on the ground, as well as pose a risk to individuals nearby, such as ground crew or other personnel. By managing and directing the prop wash, the Pilot in Command (PIC) helps to maintain a safe environment, protecting both people and equipment from the dangers associated with the high-speed airflow generated by the running engines.

Monitoring fuel levels, conducting maintenance checks, or calibrating navigation equipment, while all important aspects of aircraft operation and management, are not specific responsibilities during the actual engine run-up process. These tasks are typically handled at different stages of flight preparation or maintenance. The procedure of the engine run-up focuses primarily on ensuring the engine's operational readiness and safety checks while actively managing the environment around the aircraft.