| Many drivers don`t look far enough ahead when driving | |
| All of these are true | |
| At highway speeds you should look ahead one-quarter mile | |
| Good drivers shift their attention from side to side and near to far |
| Rear of front trailer open, rear of back trailer open | |
| Rear of front trailer closed, rear of back trailer closed | |
| Rear of back trailer open, rear of front trailer closed | |
| Rear of front trailer open, rear of back trailer closed |
| Open the shut off valves of the first trailer and close the shut off valves of the second trailer | |
| Open the shut off valves of the second trailer and close the shut off valves of the first trailer | |
| Open the shut off valves of both trailers | |
| Close the shut off valves of both trailers |