Practice question

The combination of which two trailer dash controls should you fully understand before driving?

  1. Wiper switch and cruise control
  2. Trailer air supply (red, 8-sided) and parking brake (yellow, diamond-shaped)
  3. Radio and HVAC
  4. Gear selector and turn signal

Answer: B — Trailer air supply (red, 8-sided) and parking brake (yellow, diamond-shaped)

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