53. To ensure complete penetration in a V-groove weld when prevented from welding on the back side, you should use a: a. Small-diameter electrode; b. Closer joint fit; c. Higher welding current; d. Backing strip. 54. In the 3F position for welding plate, the weld must be deposited: 55. The circle used in a welding symbol means that welding is to be: 56. The small flag in a welding symbol means the weld is to be made in:
PDHonline Course M564©2015 Jurandir Primo Page 100 of 12157. PAW –Plasma Arc Welding is similar to: a. SMAW; b. GTAW; c. FCAW; d. SAW. 58. How is called the thickness of thin sheet metals and how they are measured? 59. What is the essential single method to prevent the occurrence of cold cracking? 60. Which of the following defects is not classified as welding discontinuity? 61. Give the meaning designations of an E7018 electrode. a. “E” means material elongation; “70” strength of the weld; “1”welding any position; “8” low hydrogen iron powder; b. “E” means covered electrode; “70” strength of the weld; “1”downhand position; “8” low hydrogen iron powder; c. “E” means covered electrode; “70” strength of the weld; “1”welding in any position; “8” low hydro-gen iron powder; d. None of the above. 62. According to ASME B31.1, PWHT of a P4 material is not mandatory when…
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