CWB Level II | 203 Questions and Answers with complete solution

What is the term used to describe the following condition of lost corrosion resistance? "When certain stainless steels are heated between 500-850° C, carbides form at the grain boundaries and cause a local depletion of chromium." (A) Oxidization (B) Increased toughness (C) Solution heat treatment (D) Sensitization - (D) Sensitization Note: Also known as "carbide precipitation" -- Chromium binds to carbides, and "sweats out" at the grain boundaries On a radiograph, undercut appears as a _________ line. (A) light (B) dark - (B) dark What is the Canadian Standard for safety in welding? - CSA W117.2 What is the typical three-phase input voltage in most Canadian welding shops? - 600V True or False: The cable from the workpiece back to the welding machine is called the "ground lead". - False. The correct term is the "work lead". What is the type of radiation that can damage living cells? - IonizingName two examples of ionizing radiation. - X-rays and Gamma rays What is the minimum suggested shade for a welding helmet when using 5/32 SMAW electrode at 150 A? - Shade 10