During a routine inspection, what is crucial to check regarding the fuel system?

Checking for the presence of leaks in the fuel lines is crucial during a routine inspection of the fuel system because leaks can pose significant safety hazards and lead to environmental contamination. Fuel leaks can cause fires or explosions, putting both the vehicle operator and others at risk. Additionally, leaks can result in the loss of fuel, which contributes to decreased efficiency and increased operational costs. Identifying and addressing any leaks promptly ensures that the system functions properly and complies with safety regulations. It is an essential part of maintaining the integrity of the fuel system and ensuring safe vehicle operation.