How can you identify a fuel leak?

Identifying a fuel leak is primarily done by looking for signs of fuel pooling on the ground or detecting the smell of gasoline. When a fuel leak occurs, gasoline may escape from the fuel system and collect on the ground beneath the vehicle. This pooling can be visually observed during a pre-trip inspection, especially if the vehicle has been parked in the same spot for a while. Additionally, the strong odor of gasoline can indicate a leak, even if there are no visible pools. These signs are critical for ensuring safety and preventing fire hazards.

The other options, while important for vehicle maintenance, do not directly relate to identifying fuel leaks. Checking coolant levels, for instance, is vital for engine overheating issues but does not provide information about fuel integrity. Inspecting the air filter focuses on the engine's air intake system and does not help detect fuel issues. Monitoring oil levels is essential for engine lubrication and performance but is unrelated to fuel leakage. Thus, option B is the most relevant choice for identifying a fuel leak effectively.