In a set of triples, the shut-off valves at the rear of the middle trailer should be: Do you currently have car insurance? Insurance is mandatory to drive in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question In a set of triples, the shut-off valves at the rear of the middle trailer should be: Answers Removed. Closed. Open. Explanation When operating a double or triple, the shut-off valves at the rear of the last trailer should be closed. All other shut-off valves should be open.
