CWB 2 Visual Weld Inspector Exam Questions And Answers. Verified And Updated.
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Course
CWB 2
Institution
CWB 2
CWB 2 Visual Weld Inspector Exam
Questions And Answers. Verified And
Updated.
A consumable electrode is: - answerAN electrode which melts and provides metal to fill the
joint
The weld heat affected zone is: - answerthe portion of the base metal adjacent to the weld
metal whose properties have...
EXAM STUDY MATERIALS July 25, 2024 1:06 PM CWB 2 Visual Weld Inspector Exam Questions And Answers. Verified And Updated. A consumable electrode is: - answer✔✔AN electrode which melts and provides metal to fill the joint The weld heat affected zone is: - answer✔✔the portion of the base metal adjacent to the weld metal whose properties have been changed due to the heat of welding When an arc is formed between two electrodes - answer✔✔electricity flows from negative cathode to positive anode The magnetic pinch force helps in the process of the detaching the molten metal drops from the electrode tip. The magnetic force - answer✔✔increases as the square of the current causing smaller and smaller droplets to be detached The electric current for welding must be transformed from - answer✔✔High voltage, low amperage to lo w voltage, high amperage The major advantage of electron beam welding process is - answer✔✔full penetration welds on thick material in one pass The progress of welding with Electroslag welding process is - answer✔✔Vertical up Explosion welding - answer✔✔is solid state process in which coalescence is produced through high speed impacting of two or more materials by controlled detonation A typical application for thermite welding is - answer✔✔joining of rails Welding without filler metal with GTAW process is referred to as - answer✔✔autogenous welding A typical weld flaw associated with GTAW process is - answer✔✔porosity SMAW power sources typically have a volt -ampere curve that is - answer✔✔drooping Once a box of E49XX low hydrogen electrodes has been opened the electrodes may remain at ambient temperature for up to a maximum of - answer✔✔4 hours EXAM STUDY MATERIALS July 25, 2024 1:06 PM Shielded Metal ARC Welding (SMAW) process - answer✔✔establishes an arc between the end of a covered electrode and the work piece. The spray mode of metal transfer is achieved with - answer✔✔high amperage, high voltage and argon -rich shielding gas digital wire feeders - answer✔✔have feedback systems to maintain the preset wire feed speed wire designated by CSA standard W48 as an E491T -9MJ-H8 - answer✔✔Results in weld deposit with a maximum of 8 ml diffusible hydrogen per 100 g of weld metal Self shield flux cored wires are - answer✔✔better able to tolerate air currents The AWS classes meta l cored wire along with - answer✔✔solid wires SAW Fluxes that significantly influence the composition of the weld metal through slag/metal reactions are called - answer✔✔active Resistance welding of aluminum - answer✔✔Can be done but with greater difficult y due to its low resistivity The plasma arc welding process is similar to what other welding process in principles of operation - answer✔✔GTAW For a flat weld profile and good penetration profile using the MCAW process - answer✔✔15 degree travel angle usin g push technique should be used What is the effect of tip to work distance (electrical sickout on deposition rate of submerged are welding - answer✔✔decreasing tip to work distance without adjusting any other variable will cause a increase in deposition ra te Electrode stick out is measured - answer✔✔From tip of nozzle to end of electrode Contact tip -to-work is the sum (CTTW) - answer✔✔of the electrode extension and arc length Increasing electrical sickout - answer✔✔decreases voltage, decreases current and i ncreases resistance Which welding process for GMAW has large weld pool and is rather large and difficult to control out of position - answer✔✔Spray transfer Which welding process for GMAW has excessive spatter - answer✔✔Globular transfer Which welding proc ess for GMAW usually has lack of fusion - answer✔✔Short Circuit what electrodes never go in holding or baking oven - answer✔✔cellulosic EXAM STUDY MATERIALS July 25, 2024 1:06 PM Submerged Arc Welding disadvantage - answer✔✔Requires inter -pass and post weld slag removal What welding process has the greatest HAZ - answer✔✔Electroslag GTAW when a BALL is formed on Tungsten - answer✔✔Aluminum Which welding process can be done outside Earth's atmosphere - answer✔✔Diffusion With tungsten arc, most of the current across the arc is carried by - answer✔✔electrons Electrode beam welding has - answer✔✔a very narrow weld and heat affected zone Which gases are used with the GMAW process - answer✔✔argon and CO2 and their mixtures in various proportions Which welding process is non -consumable electrode process - answer✔✔GTAW Which shielding gas does GMAW use for spray transfer - answer✔✔95% Argon and 5% CO2 The deposition rate of SMAW electrodes is increased by including - answer✔✔Iron Power Electrode in Flux cored are welding is - answer✔✔Tubular wire containing f lux or other ingredients What welding process is not used in overhead position - answer✔✔SAW (Submerged Arc Welding SAW Fluxes that significantly influence the composition of the weld metal through slag/metal reactions are called - answer✔✔are classified i n conjunction with welding wire forming a flux designation A welding arc consists of a - answer✔✔high current and low voltage The heat of the welding arc is used to - answer✔✔locally melt the base material and filler material to create fusion upon solidification Welding using GTAW process with current set to DCEN - answer✔✔30% arc heat at the electrode and 70% arc heat at the wor k The function of the ingredients in the electrode coating of SMAW electrodes is to - answer✔✔provide a gas shield, slag covering, scavengers, arc stabilization and additional alloying elements The temperature for holding low hydrogen electrodes - answer✔✔120 C The GMAW process uses (Blank) to shield the molten weld from the atmosphere - answer✔✔external shielding gas EXAM STUDY MATERIALS July 25, 2024 1:06 PM The flux cored arc welding is an arc welding process usually in the semi -automatic mode, consisting of: - answer✔✔A constant current power su pply, a continuous speed wire feeder, a welding gun, and a continuous filler metal electrode with a hallow core containing flux and other ingredients Welding is process a joining process that by definition requires application of - answer✔✔Either heat or p ressure Name the two main methods of arc shielding - answer✔✔flux shielding and gas shielding Which direction do the electrons flow in an electrical are - answer✔✔Cathode to anode In are welding, the electric are is intensely hot with temperature exceeding - answer✔✔30,000 C How does the arc voltage and arc stiffness change when the arc length is increased - answer✔✔Arc voltage increases and arc stiffness decreases What type of penetration and weld width can be expected when using DC positive (GTAW) - answe r✔✔Shallow penetration and a wide weld Which polarity is chosen most often for direct current GTAW welding of steels and why - answer✔✔Direct current electrode negative. More heat is produced at the work piece leading to deeper weld penetration Why must sh ielding gas for GTAW be completely inert - answer✔✔Presence of active gases like oxygen and carbon dioxide the tungsten electrode and the limit its life. Two advantages of GTAW process - answer✔✔It gives high quality deposits, and the process can be used t o weld virtually all metals and alloys Why is SMAW a very commonly used welding process - answer✔✔It provides great flexibility in terms of the broad range of materials and their thicknesses that can be joined in all welding positions SMAW uses constant cu rrent or constant voltage - answer✔✔constant current Why is care necessary in the proper storage and handling of electrodes for welding steels - answer✔✔Improperly stored electrodes can pick up moisture leading to increased weld metal hydrogen content and therefore increased risk of cold cracking in the weld zone GMAW uses Constant Voltage or Constant Current - answer✔✔Constant Voltage Which metal transfer would be applied to Cast Iron - answer✔✔GMAW: Short Circuiting Which metal transfer would be applied t o aluminum alloy - answer✔✔GMAW: Spray
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