Anti-Lock Braking Systems — CDL School Bus Practice Test
22 questions in this topic · 22 drawn at random this round
What happens when your steering wheels lock up versus when your other wheels lock up?
Session Progress
This CDL School Bus Anti-Lock Braking Systems practice set has 22 practice questions based on the official exam materials, each with an instant explanation. You need 80% on the real CDL School Bus knowledge test to pass.
Sample questions
Three questions from the Anti-Lock Braking Systems bank with the correct answer and an explanation. The practice quiz above draws 22 questions at random from the same bank.
On which air-brake school buses and other air-brake vehicles does the U.S. DOT require Anti-Lock Braking Systems (ABS)?
- Air-brake vehicles built on or after March 1, 1998 — Correct answer
- Air-brake vehicles built on or after March 1, 1999
- Only air-brake vehicles built on or after March 1, 2000
- All air-brake vehicles regardless of build date
Explanation: The U.S. DOT requires ABS on air-brake vehicles (trucks, buses, trailers, and converter dollies) built on or after March 1, 1998. English term: Anti-Lock Braking System, ABS (防抱死制动系统 / sistema de frenos antibloqueo).
Handbook: Section 10: School Buses — Antilock Braking Systems
On which hydraulic-braked trucks and buses does the U.S. DOT require ABS?
- Hydraulic-braked trucks and buses of 10,000 lbs GVWR or more built on or after March 1, 1999 — Correct answer
- Hydraulic-braked trucks and buses of 10,000 lbs GVWR or more built on or after March 1, 1998
- Hydraulic-braked vehicles of 26,000 lbs GVWR or more built on or after March 1, 1999
- All hydraulic-braked vehicles regardless of weight or build date
Explanation: ABS is required on hydraulic-braked trucks and buses with a GVWR of 10,000 pounds or more built on or after March 1, 1999. English term: GVWR, Gross Vehicle Weight Rating (车辆总重额定值 / peso bruto vehicular).
Handbook: Section 10: School Buses — Antilock Braking Systems
What is true of many buses that were built BEFORE the ABS requirement dates?
- Many of them have been voluntarily equipped with ABS — Correct answer
- They are legally prohibited from having ABS installed
- None of them can ever have ABS
- All of them were recalled and rebuilt with ABS
Explanation: Many buses built before the required dates have been voluntarily equipped with ABS, so an older bus may still have it. English term: voluntarily equipped (自愿加装 / equipado voluntariamente).
Handbook: Section 10: School Buses — Antilock Braking Systems