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ASNT LEVEL II EXAM NEWEST 2025 ACTUAL
EXAM COMPLETE 200 QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+
Describe how orbital welding works. - ANSWER-Same as TIG, but machine has tungsten inside and head revolves around pipe and fuses metal together. It DOES NOT use a filler metal
What is OFW? - ANSWER-Oxy Fuel Welding; the first and most basic type of welding
What is the set up for OFW - ANSWER-acetylene, oxygen (separate tanks), and a torch
Describe the process of OFW - ANSWER-Acetylene and oxygen come from their separate tanks and blend in the mixing chamber of the torch and create a flame
What is another function of OFW and describe the process - ANSWER-cutting; this requires a different torch with an extra 1 / 4
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handle for the cutting oxygen (higher pressure than flame oxygen) blow the melted metal away from material being cut
How is filler wire labeled? - ANSWER-by what the metal is
What is the breakdown of filler wire labels?In ER70S-6
ER= ___ 70= ___S= ____6 = ___
if it was E70T-6 the T = ___ - ANSWER-ER= electrode rod; 70= tensile strength (ksi); S= solid rod; 6 = chemical composition if it was E70T-6 the T = tubular for flux core wire
What does the filler wire label tell us about stainless steels? - ANSWER-Type of stainless, Ex. ER316L or ER304L
What does the L in stainless steel names mean? - ANSWER- Low-carbon
What are the 400 series stainless steels? - ANSWER-duplex stainless; they have a higher iron content and are magnetic
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What elements give stainless steels their corrosion resistant properties? - ANSWER-Chromium and nickel that create an oxide layer on the surface of the stainless steel
What molecule is formed on the outer layer of stainless steels? - ANSWER-chromium oxide from the air
What element can ruin the protective layer on the outside of stainless steels? Why? - ANSWER-carbon because it binds with chromium to create chromium-carbides that are less resistant to chemical attack
When chromium-carbides form on the outer layer of stainless steels what chemicals will cause the material to corrode? - ANSWER-chlorides and acids (think stress corrosion cracking)
Why should gloves be worn when handling stainless steel? - ANSWER-Oils on your hands can cause contamination and if it is in a weld zone it can burn and cause discoloration of the tubing
How much chromium is in stainless steels to provide the protective layer? - ANSWER-10.5 - 12 wt% 3 / 4
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What are the five basic types of stainless steels? - ANSWER- 200-300 = austenitic some 400s = ferritic balance of 400s = martensitic duplex precipitation hardening
How are austenitic, ferritic, and martensitic stainless steels determined? - ANSWER-their metallurigcal structure at room temperature
300 stainless steels are known for - ANSWER-their nonmagnetic, good toughness and ductility at elevated and low temps, they have the best general corrosion resistance of all SS
what are ferritic stainless steels knows for - ANSWER-better resistance to stress-corrosion cracking, pitting, and crevice corrosion than austenitic, also ferro-magnetic, has a BCC structure; less resistant to corrosion
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