Question Header boards: Answers Should never be used. Protect the driver from being hit by cargo. Protect the driver's head when entering the cab of a truck. Explanation Front-end header boards, also known as "headache racks," protect the driver from cargo moving in the event of a crash or emergency stop. Take a FREE Practice Test Now This questions appears in the following tests: Nevada Knowledge Test Class A , New Mexico Knowledge Test Class A , Utah Knowledge Test Class A ,