This quiz has no questions yet.
Practice question

An Anti-Lock Braking System (ABS):

  1. Allows wheels to lock up.
  2. Prevents wheels from locking up.
  3. Makes it easier to turn a large vehicle.
  4. Assists with the operation of brake lights.

Answer: B — Prevents wheels from locking up.

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: Pennsylvania CDL Combination Test 2 →