CWB Module 6 ELECTRODES AND CONSUMABLES verified to pass 2023/2024

CWB Module 6 ELECTRODES AND CONSUMABLESEXAM PRACTICE Today, most mild steel electrodes have a wire core composed of? A) rimmed steel B)semi-killed steel c) fully killed steel d)cold-rolled steel - correct answer fully killed steel EXAM PRACTICE In medium coated electrodes, the percentage of the electrode weight derived from the coating is: a)10-25% b)20-35% c)25-40% d)25-55% - correct answer 20-35% EXAM PRACTICE The main function of slag do not include: a)slowing the critical cooling rate of the weld b)protecting the weld metal from contamination c)reducing the amount of oxygen and other impurities in the weld d) controlling the bead shape and smoothness - correct answer a) slowing the critical cooling rate of the weld EXAM PRACTICE An electrode that is to be used with DC electrode positive current only is: a)E4313 b)E4910 c)E4918 d)E4924 - correct answer b E4910 EXAM PRACTICE The addition of cellulose to an electrode coating will: a) improve the welds ductility b) reduce the weld's ductility c) produce small volumes of gases like CO2 and H2 d) produce a low-hydrogen type weld deposit - correct answer a) improves the welds ductility EXAM PRACTICE According to CSA W48, the minimum yield strength required by the as-welded deposit soild carbon steel filler metals for gas shielded arc welding is: a)340MPa b)400MPa c)430MPa d)490MPa - correct answer b)400MPa EXAM PRACTICE The impact toughness of the weld deposit required for the B-G 49A 3C G6 (ER49S-6) electrode is : a) not specified b) 27J at 0 Celsius c) 27J at -20 Celsius d) 27J at -30 Celsius - correct answer d) 27J at -30 Celsius EXAM PRACTICE The following is not a major category of gas shielding tubular electrodes: a) cellulose types b)rutile types c)basic types d)metal cored types - correct answer a) Cellulose types EXAM PRACTICE Generally, as the percentage of carbon dioxide in an argon gas mixture decreases, the final weld deposit will have: a) increased strength properties due to a higher manganese and silicone content b) increased strength properties due to a lower manganese and silicone content c) decreased strength properties due to a higher manganese and silicone content d)decreased strength properties due to a lower manganese and silicone content - correct answer a)increased strength properties due to a higher manganese and silicone content EXAM PRACTICE The result of increased nitrogen content in the final weld deposit will be a) cracking b) undercut c) poor bead appearance d) porosity - correct answer d)porosity EXAM PRACTICE The following electrode are not gas shielded: