GMAW & FCAW (REVIEW QUESTIONS) WITH COMPLETE SOLUTIONS
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GMAW & FCAW
Institution
GMAW & FCAW
GMAW & FCAW (REVIEW QUESTIONS)
WITH COMPLETE SOLUTIONS
What happens to the weld pool if the travel speed is too fast during GMAW?
If the travel speed is too fast in GMAW, the weld pool may not have enough time to fill the
joint properly, leading to incomplete fusion and weak welds.
How doe...
GMAW & FCAW (REVIEW QUESTIONS)
WITH COMPLETE SOLUTIONS
What happens to the weld pool if the travel speed is too fast during GMAW?
✔✔If the travel speed is too fast in GMAW, the weld pool may not have enough time to fill the
joint properly, leading to incomplete fusion and weak welds.
How does the composition of the flux affect the welding process in FCAW?
✔✔The composition of the flux in FCAW can influence the arc stability, slag removal ease, and
the mechanical properties of the final weld.
What is the primary advantage of using dual-shield FCAW over self-shield FCAW?
✔✔The primary advantage of dual-shield FCAW is improved arc stability and reduced spatter
due to the combination of external shielding gas and flux.
What type of gas is commonly used for shielding in GMAW?
✔✔Argon and carbon dioxide are commonly used as shielding gases in GMAW, often in
mixtures to optimize weld quality.
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, Why is maintaining a consistent arc length crucial in FCAW?
✔✔Maintaining a consistent arc length in FCAW is crucial because it directly affects heat input,
penetration, and bead shape.
How does wire diameter influence the welding parameters in GMAW?
✔✔Larger wire diameters typically require higher voltage and amperage settings, whereas
smaller diameters allow for more precise control at lower settings.
What are some common defects that can arise from improper technique in FCAW?
✔✔Common defects in FCAW include slag inclusions, porosity, and undercutting, often
resulting from improper technique or settings.
How does the welding position impact the choice of FCAW or GMAW?
✔✔The welding position may dictate the choice of FCAW for vertical or overhead work, as
FCAW can provide better control of the molten weld pool in challenging positions.
What safety measure should always be taken to prevent electrical hazards in welding?
✔✔Always ensure that the welding machine is properly grounded to prevent electrical shocks
during the welding process.
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