What is the purpose of the brake test during pre-trip?

• A. To verify brakes respond properly and the parking brake holds.
• B. To test horn.
• C. To warm up the engine.
• D. To check seat cushions for wear.

Answer: (A)

The brake test during a pre-trip is all about making sure the vehicle can stop reliably and stay put when needed. It verifies that the service brakes respond promptly and smoothly to the driver's input, bringing the vehicle to a controlled stop. It also checks that the parking brake can hold the vehicle in place once applied, which is crucial for safety when you’re parked on uneven ground or a hill. If either part doesn’t work correctly, you could lose control or roll when you least expect it, so this test confirms both braking effectiveness and parking stability. The other activities listed—like testing the horn, warming up the engine, or checking seat cushions—aren’t part of the brake test and don’t assess braking performance.