What must be inspected during a pre-trip inspection of a trailer?

During a pre-trip inspection of a trailer, it is essential to assess tires, brakes, connections, and load security to ensure safe operation on the road.

Inspecting tires includes checking for appropriate inflation, tread depth, and overall condition to prevent blowouts or other tire-related issues during transit. Brake inspection is critical as well, ensuring that braking systems are functional, which directly impacts the ability to stop safely and effectively.

Connections involve checking the couplings and the secure attachment of the trailer to the towing vehicle, which is vital for stability and control while driving. Load security entails verifying that cargo is properly distributed and secured to prevent shifting during transport, which can affect handling and pose safety hazards.

Each of these components plays a crucial role in maintaining safety and regulatory compliance while operating a heavy trailer. The other answer choices may include relevant elements of a pre-trip inspection, but they do not encompass the comprehensive aspects necessary for thorough safety checks.