ABYC Diesel Practice Exam

Fueling valves in multiple engine and/or tank diesel fuel systems must be labeled according to their function and position. This labeling is essential for safety and efficiency, as it allows operators to quickly identify the purpose of each valve and its orientation. Proper identification helps prevent potential hazards that may arise from misoperation, ensuring that fuel is directed correctly and reducing the risk of spills or contamination during operations. Accurate labeling also aids in maintenance and troubleshooting, as technicians can easily locate the appropriate valves when conducting repairs or inspections.

While labeling valves by engine model and manufacturer, fuel type and grade, or installation date and technician could provide useful information, function and position are the most crucial aspects for the safe and effective operation of the fueling system. This focus on clarity in function and position reduces confusion, particularly in complex systems with multiple engines or tanks.