2024 OH CDL Practice Test: Double and Triples - Test 2 Based on 2024 OH CDL Handbook 10. Shut-off valves are sometimes called ______. A Cut-out cocks. B Trolley valve. C The closer lever. D Johnson bar. Next More 10/27 Progress 0 Errors Restart Next Next Double and Triples - Test 2 Back to Test List Double and Triples - Test Double and Triples - Test 3 Challenge Library 12 More OH CDL Practice Tests 26 Double and Triples - Test 3 27 Double and Triples - Test 4 28 Double and Triples - Test 5 29 Tank - Test 30 Tank - Test 2 31 Tank - Test 3 32 Tank - Test 4 33 Tank - Test 5 34 Air Brakes - Test 35 All - Test