CWB Level II Review Questions and Answers

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? Ionizing Name 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 Approx. how far could spatter travel when welding/cutting from 2.5m high? Possibly up to 6m What is the toxic component contained in some copper alloys? Beryllium Which welding process will likely have the highest fume generation rate? [SMAW / SAW / FCAW] FCAW What do the terms TLV and TWA stand for? TLV: Threshold limit value TWA: Time weighted average Is helium lighter or heavier than air? Lighter The action of UV light on oxygen produces which toxic gas? Ozone Which common fuel gas has the widest range where it can become flammable when mixed with air? Acetylene