Caw Guides d'étude, Notes de cours & Résumés

Brief description of Basic Core wires - Answer-Have a limestone / Fluorspar flux core, arc transfer is globular Brief description of Rutile core wires - Answer-Good operational and positional capabilities, with easy slag removal Can DC straight polarity be used for FCAW? - Answer-Yes for some self shielded wires Describe DCRP: - Answer-Direct current reverse polarity Describe the two FCAW processes commonly used? - Answer-Gas shielded and self shielded Explain the 2/3's 1/3rd ratio in th...

During welding preparations, what should be set up around the welding area? - Answer-Flash shields For FCAW open V-groove welds on carbon steel, the bevel angle of the coupons should be - Answer-30 to 37-1/2 degrees If a hard hat is required during a welding operation, the hat should allow for the attachmentof - Answerrear deflector material In FCAW-S, the flux inside the wire core contains ingredients that - Answer-generate a shielding gas Increasing electrode extension in FCAW welding inc...

- when mixed with air or oxygen will ignite at much lower concentrations than any other fuel gas application and filler metal - polarity of the gun and workpiece leads is dependent upon what? arc length - determined by voltage before any welding procedure can take place - work area must be made ready, welding equipment must be properly set up, Metal to be welded must be prepared external shielding gas should never be used with? - FCAW-S FCAW in 1g position coupon with one of the tack welds...

Ear plugs are primarily worn by welders to protect their ears from ______. - Sparks Even a shielding gas can create a hazard if ______. - Enough is released to displace oxygen in the area For FCAW, the polarity of the gun and workpiece leads depends on the application and the ______. - Type of filler metal Higher welding heat, deeper penetration, and higher beads result from a higher ______. - Current In the FCAW-S process, agents for degassing the weld are contained in the ______. - Flux ...

______ are added to the flux core to produce desired chemical and mechanical properties in the deposited weld metal , such as hardness, strength, toughness, ductility, and corrosion resistance. - Answer-Alloying elements _______ equipment should be used to keep smoke and fumes from entering a welder's helmet. - Answer-Fume extraction A common gas mixture for FCAW-G is ______, which produces a spray transfer with small droplet size. - Answer-75% argon and 25% CO2 A gaseous shield created ...

Which of the following two sub-processes for FCAW can be used for field work? a. FCAW-G b. FCAW-S - b. FCAW-S The power source required for GMAW and FCAW is a : a. Constant Current Direct Current Machine b. Constant Current Alternating Current Machine c. Constant Voltage Direct Current Machine d. Constant Voltage Alternating Current Machine - c. Constant Voltage Direct Current Machine The recommended shielding gas for FCAW-S is: a. 75% Argon 25% CO2 b. 100% CO2 c. 90% Argon 10% CO2 d...

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What metals are often welded using FCAW? - Carbon, alloy steels, and stainless steels What does the term FCAW-G mean? - Externally supplied shielding gas is used What gas or gas mixtures are commonly used for FCAW? - C02 or a mixture of Argon C02 Describe the two FCAW processes commonly used? - Gas shielded and self shielded Which of the 2 above is the electrode stickout most important, why? - Self shielded. Can have an electrode stick out of 3" or more Which polarity is most often use wi...

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