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When are warning triangles used and how far should you place them away from the obstruction?

  1. Used when refueling, placed 5m away

  2. Used when broken down, placed 45m (147 ft) away from obstruction

  3. Used during traffic stops, placed 20m away

  4. Used when loading, placed 10m away

The correct answer is: Used when broken down, placed 45m (147 ft) away from obstruction

Warning triangles are used when a vehicle is broken down or disabled and is obstructing the roadway. They are placed at a distance of 45 meters (147 feet) away from the obstruction to give ample warning to oncoming traffic and prevent accidents. The other options are incorrect because they do not properly address the scenario of a broken down or disabled vehicle on the road. Option A mentions refueling, which typically occurs at a gas station and not on the road. Option C mentions traffic stops, which are typically for law enforcement and not for a disabled vehicle. Option D mentions loading, which again, is not relevant to the scenario of a disabled vehicle obstructing traffic.