Which of the following is NOT safety equipment that should be present on a passenger transport vehicle?

The presence of safety equipment on a passenger transport vehicle is crucial for ensuring the safety and well-being of passengers and the driver. A fire extinguisher, first aid kit, and reflective triangles are essential safety items. Each serves a specific purpose: the fire extinguisher is for suppressing fires that may occur during transit, the first aid kit is for addressing medical emergencies, and reflective triangles are used to alert other drivers if the vehicle becomes disabled or has an issue on the road, helping to prevent further accidents.

In contrast, carpet cleaning supplies do not serve a safety function and are therefore not considered essential safety equipment. While maintaining a clean environment is important for passenger comfort and vehicle upkeep, it does not directly contribute to the immediate safety of those on board, making it the item that should not be categorized alongside the critical safety gear listed earlier.