NOCTI Study Guide: Basic Welding & Equipment, Exams of Welding Inspection Technologies

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NOCTI Study Guide: Basic Welding &

Equipment

Preheating - ** VERIFIED ANSWERS **✔✔Under bead cracking is often eliminated by Duty Cycle - ** VERIFIED ANSWERS **✔✔Welding machines are rated according to the... Porosity - ** VERIFIED ANSWERS **✔✔Too short an arc in SMAW will cause. .. Porosity - ** VERIFIED ANSWERS **✔✔One of the major problems in welding galvanized steel is Ultrasonic - ** VERIFIED ANSWERS **✔✔Type of weld test that is useful in detecting internal defects. A poorly-shielded arc - ** VERIFIED ANSWERS **✔✔Windy or draft conditions may cause what type of problem? Are stress risers - ** VERIFIED ANSWERS **✔✔Holes, notches, and sharp corners in metals are? The metal to be joined - ** VERIFIED ANSWERS **✔✔In welding applications the term base metal refers to... nonmetallic inclusion - ** VERIFIED ANSWERS **✔✔Slag trapped in a weld is an example of...

Heat Affected Zone (HAZ) - ** VERIFIED ANSWERS **✔✔The portion of the base metal that is not melted during welding, but whose structure and properties are altered, is the? Completely Dry - ** VERIFIED ANSWERS **✔✔In the PAC process, compressed air must be... neutral - ** VERIFIED ANSWERS **✔✔When silver brazing, adjust the flame to... Repair and maintenance - ** VERIFIED ANSWERS **✔✔In which of the following work areas is braze welding of greatest use? Shield the weld - ** VERIFIED ANSWERS **✔✔The primary function of shielding gas in GTAW is to... 6,000 *F - ** VERIFIED ANSWERS *✔✔The temperature of a shielded metal electrical arc is? 180 - ** VERIFIED ANSWERS **✔✔A guided bend test specimen for mild steel is bent at an angle of _____________ degrees. Undercut - ** VERIFIED ANSWERS **✔✔A groove melted into the base metal adjacent to the toe or root of a weld and left unfilled by weld is... High voltage/low amperage - ** VERIFIED ANSWERS **✔✔Spray-arc transfer requires which voltage and amperage relationship? Argon - ** VERIFIED ANSWERS **✔✔Which is the most common shielding gas used with GMAW on steel? Using alternating current - ** VERIFIED ANSWERS **✔✔What is not a cause of arc blow?

Ultrasonic - ** VERIFIED ANSWERS **✔✔The weld test method most useful in detecting internal defects? clamp, fixture, or jig - ** VERIFIED ANSWERS **✔✔Devices used to hold materials in position while welding. transformer, rectifier, generator - ** VERIFIED ANSWERS **✔✔Three pieces of equipment used to supply power during arc-welding. consumable - ** VERIFIED ANSWERS **✔✔The electrode for GMAW and SMAW is?