13. Shielded Metal Arc Welding (SMAW) and Gas Metal Arc Welding (GMAW) use consumable electrodes, with GMAW employing a ___ gas to protect the weld pool from contamination. (True/False) 14. Submerged Arc Welding (SAW) and Electroslag Welding (ESW) are methods that use a granular flux to cover the weld, which helps in preventing ___ and improving the quality of the weld. (True/False) 15. Oxy Acetylene and Oxy Hydrogen welding are gas welding techniques that use a flame produced by combining oxygen with _ or _, respectively, to melt the base material and filler rod to form a weld. (True/False) 16. Corrosion-resistant coatings on springs can inadvertently increase the spring's weight and significantly impact its dynamic performance. (True/False)