CWB LEVEL II KEY REVIEW POINTS- MODULES 1 TO 22 2024 QUESTIONS WITH VERIFIED SOLUTIONS ALREADY PASSED A+

CWB LEVEL II KEY REVIEW POINTS- MODULES 1 TO 22 2024 QUESTIONS WITH VERIFIED SOLUTIONS ALREADY PASSED A+ 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 CWB LEVEL II KEY REVIEW POINTS- MODULES 1 TO 22 2024 QUESTIONS WITH VERIFIED SOLUTIONS ALREADY PASSED A+ 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 Name two examples of ionizing radiation. - CORRECT ANSWER X-rays and Gamma rays What is the minimum suggested shade for a welding helmet when using 5/32 SMAW electrode at 150 A? - CORRECT ANSWER Shade 10 Approx. how far could spatter travel when welding/cutting from 2.5m high? - CORRECT ANSWER Possibly up to 6m What is the toxic component contained in some copper alloys? - CORRECT ANSWER Beryllium Which welding process will likely have the highest fume generation rate? [SMAW / SAW / FCAW] - CORRECT ANSWER FCAW What do the terms TLV and TWA stand for? - CORRECT ANSWER TLV: Threshold limit value CWB LEVEL II KEY REVIEW POINTS- MODULES 1 TO 22 2024 QUESTIONS WITH VERIFIED SOLUTIONS ALREADY PASSED A+ TWA: Time weighted average Is helium lighter or heavier than air? - CORRECT ANSWER Lighter The action of UV light on oxygen produces which toxic gas? - CORRECT ANSWER Ozone Which common fuel gas has the widest range where it can become flammable when mixed with air? - CORRECT ANSWER Acetylene What substance should you NEVER apply to a stiff pressure-adjusting screw on an oxygen regulator? - CORRECT ANSWER Oil or grease What is the maximum gauge pressure that acetylene should be used? (kPa/psi) - CORRECT ANSWER 103 kPa (15 psi) Which toxic gas is produced when welding on surfaces with chlorinated hydrocarbon solvents? - CORRECT ANSWER Phosgene gas What is the typical max. OCV of an AC welding machine? - CORRECT ANSWER 80 V