CDL · Air brakes
Air brakes are really several braking systems combined. Which of these is NOT one of them?
Correct answer: The antilock braking system (ABS).
Answer options
- AThe service brake system
- BThe parking brake system
- CThe antilock braking system (ABS) Correct
Why
An air brake system has three parts: service brakes, parking brakes, and emergency brakes. ABS is an extra electronic control that helps keep the wheels from locking up, not one of those three braking systems.
About this question
Topic: Air brakes License: CDL
Part of these practice sets:
Where it applies: Asked in every state.
Practice the whole set
This question is part of How Air Brakes Work (18 questions). Take the full set and check your score.
Practice How Air Brakes WorkMore questions from How Air Brakes Work
- What is the purpose of an alcohol evaporator in an air brake system?
- On a vehicle with air brakes, what do the brake shoes and linings press against each time you brake?
- Which part of the vehicle drives the air compressor?
- If the air compressor springs a leak, which valve keeps the stored air from escaping?
- In an air brake system, what is the purpose of the air storage tanks?
- On an air brake system, what pressure does it normally take for the safety valve to open?
- Air-braked trucks and buses most often use which kind of brake at the wheels?
- Your air brake system's safety relief valve starts letting air escape. What does this tell you?
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