Which of the following is an example of vehicle failure?

• A. Brake failure
• B. Power supply failure
• C. Pressure leaks
• D. Worn-out bearings

Answer: (A)

The main concept here is recognizing a failure that disables a critical function needed to operate the vehicle safely. Brake failure directly removes your ability to slow down or stop the vehicle, which is essential for safe operation. When brakes don’t work, you can’t control speed or STOP effectively, making it the clearest example of a vehicle failure.

Other problems can compromise performance or safety in different ways—power supply issues can affect electrical systems, a pressure leak can reduce hydraulic force, and worn-out bearings can cause wear or noise—but none of these describe an immediate, fundamental loss of a primary safety function like braking does.