CWB Level II question n answers graded A+

CWB Level II (D) Sensitization Note: Also known as "carbide precipitation" -- Chromium binds to carbides, and "sweats out" at the grain boundaries - correct answer 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 (B) dark - correct answer On a radiograph, undercut appears as a _________ line. (A) light (B) dark CSA W117.2 - correct answer What is the Canadian Standard for safety in welding? 600V - correct answer What is the typical three-phase input voltage in most Canadian welding shops? False. The correct term is the "work lead". - correct answer True or False: The cable from the workpiece back to the welding machine is called the "ground lead". Ionizing - correct answer What is the type of radiation that can damage living cells? X-rays and Gamma rays - correct answer Name two examples of ionizing radiation. Shade 10 - correct answer What is the minimum suggested shade for a welding helmet when using 5/32 SMAW electrode at 150 A? Possibly up to 6m - correct answer Approx. how far could spatter travel when welding/cutting from 2.5m high? Beryllium - correct answer What is the toxic component contained in some copper alloys? FCAW - correct answer Which welding process will likely have the highest fume generation rate? [SMAW / SAW / FCAW] TLV: Threshold limit value TWA: Time weighted average - correct answer What do the terms TLV and TWA stand for? Lighter - correct answer Is helium lighter or heavier than air? Ozone - correct answer The action of UV light on oxygen produces which toxic gas? Acetylene - correct answer Which common fuel gas has the widest range where it can become flammable when mixed with air? Oil or grease - correct answer What substance should you NEVER apply to a stiff pressure-adjusting screw on an oxygen regulator? 103 kPa (15 psi) - correct answer What is the maximum gauge pressure that acetylene should be used? (kPa/psi) Phosgene gas - correct answer Which toxic gas is produced when welding on surfaces with chlorinated hydrocarbon solvents? 80 V - correct answer What is the typical max. OCV of an AC welding machine? 30° - correct answer In an isometric drawing, the lines (for width, length and depth) are inclined at an angle of how many degrees? 6 - correct answer What are the maximum number of views in an orthographic drawing? Perspective and Isometric - correct answer What are the two general classes of picture drawings? 1) Butt 2) Corner 3) T 4) Lap 5) Edge - correct answer What are the 5 basic joints? 1) Groove 2) Fillet 3) Plug/Slot 4) Surfacing 5) Edge - correct answer What are the 5 basic weld types? 30,000 - correct answer Plasma cutting torch temp can reach temperatures of __________ ° Celsius. True - correct answer True or False: All plasma arc cutting equipment is operated using DCEN.