CWB Level II Exam Questions and Correct Answers

CWB Level II Exam Questions and Correct Answers 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 - Correct Answer (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 - Correct Answer (B) dark What is the Canadian Standard for safety in welding? - Correct Answer CSA W117.2 What is the typical three-phase input voltage in most Canadian welding shops? - Correct Answer 600V True or False: The cable from the workpiece back to the welding machine is called the "ground lead". - Correct Answer False. The correct term is the "work lead". What is the type of radiation that can damage living cells? - Correct Answer Ionizing