CWB - Mod 21, Part 1 question n answers rated A+ 2023/2024

CWB - Mod 21, Part 1The portion of the base metal that has not been melted but whose mechanical properties or micro structure have been altered by the heat of welding ? - correct answer Heat Affected Zone Deformation that remains after removal of the load that caused it - correct answer Plastic Deformation The ability of a material to resist the growth of a crack - correct answer Toughness Force per unit area - correct answer Stress The ability of a material to become permanently deformed without failure - correct answer Ductility Crystal Structure of Iron in temperature up to 910 Celcius ? - correct answer BCC Crystal Structure of Iron in temperature between 910 to 1390 Celcius? - correct answer FCC The solubility of carbon in the BCC form of iron is very small. The maximum solubility only about ________weight percent at 723 Celcius - correct answer 0.02 List major factors that affect HICC (Hydrogen Induced Cold Cracking) - correct answer 1. microstructure (hardness) 2. Stress 3. Hydrogen List Possible methods used to avoid HICC - correct answer a. Low Hydrogen consumables b. Preheat c. temper bead technique d. PWHT The prime function of the flux in SAW is to form a slag that protects the molten weld metal from the _____? - correct answer air