Chapter 12 51 Copyright Goodheart-Willcox Co., Inc. May not be reproduced or posted to a publicly accessible website. Name ________________________________________________________________ 19. When arc welding, what must be done to prevent slag from one weld bead from mixing with weld beads that are later? _created __________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________ 20. _____ The correct welding arc length is about _____. A. 1/8″ (3 mm) B. 3/16″ (5 mm) C. 5/32″ (4 mm) D. less than 1/8″ ( 3 mm) E. equal to the diameter of the electrode 21. If parts cleaned with _____ are not thoroughly dried before they are welded, a poisonous gas called phosgene can created. _be _________________________________________________________________________________________________________________ 22. _____ To counteract forward arc blow, place the workpiece lead _____. A. near the start of the weld joint B. near the middle of the weld joint C. near the end of the weld joint For questions 23–25, refer to the following illustration. GFEDCBA Goodheart-Willcox Publisher 23. _____ How would you correct weld bead E? A. Increase the amperage. B. Increase the travel speed. C. Decrease the amperage. D. Decrease the arc length. E. Decrease the travel speed. 24. Which weld bead was made with too much amperage? _ _________________________________________________________________________________________________________________ 25. Which weld bead was made with a travel speed that was too fast? _ _________________________________________________________________________________________________________________