Where are the shut-off valves located on a trailer?

The correct location for shut-off valves on a trailer is at the back of trailers that are used to tow other trailers. This is critical for safety when multiple trailers are connected. The shut-off valves control the flow of various fluids, such as air for the brakes or hydraulic fluid, and are strategically placed for easy access by operators during trailer setup and disconnect.

Positioning the shut-off valves at the rear of a trailer allows the driver to manage the connections conveniently while ensuring that they can quickly access them without unnecessary obstructions. This enhances operational efficiency and safety, as the driver can quickly shut off fluid flow in case of an emergency or maintenance requirement.

The other choices do not provide correct placements for shut-off valves. Valves are not typically located on the front of the trailer, under the trailer axle, or inside a storage compartment because these locations would impede access and operational efficiency when towing or maneuvering the trailer combination.