Plasma arc - Study guides, Class notes & Summaries

Gas In PAC, plasma is created by ___________? Faster & Efficient In most cases, PAC is ___________ & more ____________ than other cutting methods. A full leather hood Which PPE is considered optional in PAC? Gas Never carry matches or _________ filled lighters in your pockets. Compressed air The simplest PAC units use filtered __________? 3" thick Industrial plasma cutting units can cut carbon steel up to ________ " thick? Pilot arc Most common ...

Welding - Answer-the joining of metals at their molecular level; manipulating heat Pulse welding - Answer-by forming one droplet of molten metal at the end of the electrode Then, just the right amount of current is added to push that one droplet across the arc and into the puddle. The transfer of these droplets occurs through the arc, one droplet at a time 4 Components of a Weld - Answer-Metal, Heat Source, Filler Metal, Shield from Air 4 ARC Welding Processes - Answer-stick, mig, tig, plas...

CWB Level 2 Closed Book EXAM 2023 with all the correct answers(Actual test 100% verified) An arc plasma consists of - CORRECT ANSWER free electrons and positive ions. Which of the following welding processes is the most commonly used? - CORRECT ANSWER Arc Welding The most arc efficient welding process is the _______ process. - CORRECT ANSWER SAW Which two areas represent the largest voltage drop in a welding arc? - CORRECT ANSWER Cathode drop zone and Anode drop zone The pinch forc...

CWB Level II Exam 2024/2025 (100%Verified Answers) Latest Update. What is the term used to describe the following condition of lost corrosion resistance? "When certain stainless steels are heated between 500-850° C, carbides form at the grain boundaries and cause a local depletion of chromium." (A) Oxidization (B) Increased toughness (C) Solution heat treatment (D) Sensitization - Correct Answer-(D) Sensitization Note: Also known as "carbide precipitation" -- Chromium binds to carbi...

CWB Level II Exam 2024/2025 (100%Verified Answers) Latest Update. What is the term used to describe the following condition of lost corrosion resistance? "When certain stainless steels are heated between 500-850° C, carbides form at the grain boundaries and cause a local depletion of chromium." (A) Oxidization (B) Increased toughness (C) Solution heat treatment (D) Sensitization - Correct Answer-(D) Sensitization Note: Also known as "carbide precipitation" -- Chromium binds to carbi...

True or False? "Electric current is readily conducted in metal (low resistance) because of the many free electrons" - Answer-True True or False? "Conventional current flow is from negative to positive." - Answer-False Materials that have a high resistance to current flow are called: A) Semi-conductors B) Conductors C) Insulators - Answer-C) Insulators True or False? "A gas can only conduct electricity when the gas has been ionized (a plasma has formed)." - Answer-Tru...

True or False? "Electric current is readily conducted in metal (low resistance) because of the many free electrons" - Answer-True True or False? "Conventional current flow is from negative to positive." - Answer-False Materials that have a high resistance to current flow are called: A) Semi-conductors B) Conductors C) Insulators - Answer-C) Insulators True or False? "A gas can only conduct electricity when the gas has been ionized (a plasma has formed)." - Answer-Tru...

True or False? "Electric current is readily conducted in metal (low resistance) because of the many free electrons" - Answer-True True or False? "Conventional current flow is from negative to positive." - Answer-False Materials that have a high resistance to current flow are called: A) Semi-conductors B) Conductors C) Insulators - Answer-C) Insulators True or False? "A gas can only conduct electricity when the gas has been ionized (a plasma has formed)." - Answer-Tru...

CWB Level II Exam 2024/2025 (100%Verified Answers) Latest Update. What is the term used to describe the following condition of lost corrosion resistance? "When certain stainless steels are heated between 500-850° C, carbides form at the grain boundaries and cause a local depletion of chromium." (A) Oxidization (B) Increased toughness (C) Solution heat treatment (D) Sensitization - Correct Answer-(D) Sensitization Note: Also known as "carbide precipitation" -- Chromium binds to carbi...

CWB QUESTIONS AND ANSWERS RATED A+ 1.To measure the strength of a welded joint what mechanical test would you prescribe? a) A transverse weld tension test b) A charpy test. c) A CTOD test. d) An all weld metal tension test. e) A side bend test. a) A transverse weld tension test 2. Select the cutting process that would provide the narrowest heat affected zone when cutting 12.5 mm (0.5 in) thick carbon steel. a) Oxy-acetylene cutting. b) Air-carbon arc cutting. c) Oxy-propane cutting. d) ...