Practice question

For the Kentucky CDL Combination Vehicles test, which statement is correct about service line?

  1. The service line carries controlled air for trailer brake application.
  2. Skip the visual coupling inspection after a successful tug test.
  3. Drive at regular speed and fix the issue after the trip.
  4. Back under the trailer at an angle to save space.

Answer: A — The service line carries controlled air for trailer brake application.

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