What should a driver do if they suspect an air leak in the brake system?

Answer: B — Consult a mechanic before further driving

If a driver suspects an air leak in the brake system, it is essential to consult a mechanic before further driving. Air leaks can significantly compromise the effectiveness of the braking system, which is critical for safe vehicle operation. The air brake system relies on pressurized air to function properly, and any leak can affect the ability to stop the vehicle safely. By consulting a mechanic, the driver ensures that the issue is assessed and resolved professionally, preventing potential brake failure or an accident. Ignoring the leak or continuing to operate the vehicle without addressing the issue poses serious safety risks, both to the driver and others on the road. Attempting to fix the leak on the road without the proper tools or knowledge could lead to further complications or accidents. Therefore, seeking professional help is the safest course of action when an air leak is suspected in a brake system.