19 20 21 When using inert-gas metal arc welding, the use of chlorinated organic solvents such as (1,1,1, Tri-Chloro-ethane) shall be kept at least -------------- away from the welding area, unless shielded to avoid the formation of Phosgene toxic gas: A 200 feet (60 meters) B 250 feet (76 meters) C D When working near overhead power lines: A Stay at least ten feet from the lines B Stay at least fifteen feet from the lines Stay at least twenty feet from the lines Only qualified persons can work near overhead lines D 35 feet (11 meters) 20 feet (6 meters) Ergonomics is: A Finding a person who fits the environment. Changing the job to make the equipment work easier Arranging the environment to fit the person. D Exercising the person so the job becomes easier. BUO C