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Practice quizzes / Illinois CDL Doubles and Triples Practice Questions - Illinois CDL Doubles and Triples Endorsement Test Exam / Question 100219
Practice question

After charging trailer brakes, what should be checked at the rear of the second trailer?

  1. Air at the rear emergency line shut-off
  2. Engine oil level
  3. Fifth-wheel grease color
  4. Steering wheel free play

Answer: A — Air at the rear emergency line shut-off

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

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