What should be confirmed about the DOT bumper?

The correct choice confirms that the DOT bumper must be securely attached, with all fasteners in place. This is critical for safety, as a properly secured bumper can help protect the vehicle's structure and ensure that it meets regulatory standards set by the Department of Transportation (DOT). A secure bumper also plays a vital role in absorbing impact during collisions, helping to minimize damage to the trailer and reduce the risk of injury in an accident.

When performing a pre-trip inspection, ensuring that the DOT bumper is firmly in place prevents dangerous situations on the road, such as the bumper detaching while driving, which could pose a risk to other road users. This highlights the importance of maintenance and compliance with safety regulations in the trucking industry, emphasizing that fasteners must not only be present but also tightly secured to fulfill their intended protective role effectively.