Fuel Handlers Course Practice Test 2025 - Free Fuel Handlers Practice Questions and Study Guide

The pressure differential gauge is a crucial instrument in fuel handling operations, as it indicates the differential pressure between the tank and the surrounding environment. A reading that falls within the green range signifies that the pressure difference is within acceptable limits, indicating that it is safe to proceed with refueling operations. This ensures that fuel is being transferred efficiently and safely without risk of leakage or other issues that could arise from abnormal pressure conditions. The green zone typically represents a state of normal operation, allowing workers to continue their tasks without interruption or risk.