What does the low air pressure warning indicate?

• A. The engine is overheating.
• B. The braking system may not have enough air pressure to operate safely.
• C. The fuel level is low.
• D. The tires are flat.

Answer: (B)

The main idea is that this warning shows the air brake system isn’t pressurized enough to operate safely. In vehicles with air brakes, braking power comes from compressed air, so when the pressure drops too low, brakes may not apply properly, increasing stopping distance or leading to loss of braking power. The right action is to stop as safely as you can and inspect the system for leaks or other issues (like moisture in lines or compressor problems). The other options aren’t indicated by a low air pressure warning—the signals aren’t about engine overheating, fuel level, or tire condition.