GTAW WLD 150 Welding and Joining Practice Test

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• Which welding processes are often preferred for field weld repairs?
• The thickness of metal required to support a load on a part is the ___.
• Which nondestructive testing method is best suited for detecting interior defects in welds?
• Crater cracks are hot cracks formed by improperly ending the welding arc in the crater of the weld.
• How is GTAW equipment set up, including the torch, power supply, and cable arrangement?
• What is the difference between a root gap and a root opening, and how do these affect GTAW?
• How can you prevent weld contamination when welding copper or copper alloys using GTAW?
• Post-weld cleaning for stainless steel often includes passivation to restore corrosion resistance. Which acids are commonly used for passivation?
• Notch effect is a stress-concentrating condition caused by abrupt changes in section thickness or continuity. Which term best describes this phenomenon?
• Which device is used to verify radiographic quality and sensitivity before the inspection?
• Porosity consists of cavity-type discontinuities formed by gas entrapment during solidification.
• Which examination method is most commonly used to detect crater cracks?
• The following statement is true or false: Peening is performed prior to preheating the structure to be repaired.
• The following statement is true or false: Solvent cleaning includes sandblasting, sanding, and wire brushing.
• What is the purpose of a Welding Procedure Specification (WPS) in GTAW practice?
• Visual examination is used to ___.
• Cold mechanical repair is not commonly used on which metal?
• Overlap should be removed from a weld.
• What type of wave is a transverse wave in which particle oscillation is perpendicular to the direction of wave propagation?
• A black light is used with the fluorescent liquid penetrant examination method.
• Visual examination is used to check for surface condition.
• Which analysis focuses on identifying the technical cause of failure using various techniques?
• What term describes a nonrelevant indication that appears on a radiograph?
• Throat cracks typically appear as relatively ___, ___ cracks along the centerline of the weld.
• What is back purging and when is it necessary in aluminum TIG welding?
• The liquid penetrant examination method is used to detect surface defects in a weld.
• Which examination method produces an eddy current in the test piece?
• What is the significance of heat input in welding, and how is it estimated in GTAW?
• Oxyacetylene welding (OAW) and shielded metal arc welding (SMAW) are often preferred for field weld repairs.
• Nondestructive testing requires a part to be permanently removed from service.
• Radiographic testing is capable of detecting interior weld defects.
• The process used to apply a thin chrome coating to repair minor damage is ___.
• The following statement is true or false: Welding is a mechanical repair method.
• What term describes a series of parallel cracks approximately 1/2 inch apart that occur in brittle deposits during relief?
• What PPE and safety practices are essential when performing GTAW welding to minimize arc exposure and fumes?
• ___ is a series of parallel cracks approximately 1/2" apart that occur in brittle deposits as they undergo stress relief.
• When performing the magnetic particle examination procedure, demagnetization is not necessary for engine and machine parts, as they typically contain residual magnetization resulting from normal operations.
• In engineering design, what term defines the minimum metal thickness required to safely carry the intended load?
• How do you select filler wire diameter for a GTAW weld in a given material thickness?
• Which weld joint type is most likely to be susceptible to lamellar tearing?
• Crater cracks are star-shaped cracks that extend from the crater of a weld to the edge of the weld.
• The weld piece must be magnetized when using the magnetic particle examination method.
• How do base metal thickness and joint design influence heat input and the number of passes required in GTAW?
• Which process reduces the fatigue strength of rotating or reciprocating equipment, such as shafts?
• Which technique is best for detecting subsurface defects in welded joints?
• When welding aluminum in the vertical or overhead position, what technique changes are recommended?
• In magnetic particle inspection, which option clearly identifies defects when exposed to a magnetic field and powder?
• Which statement about heat input and filler diameter is true?
• In fabrication, what is the term for a point where inspection and acceptance are required before fabrication can proceed?
• The following statement is true or false: Hardness testing is never used to evaluate the mechanical properties of steel.
• Undercut produces a stress concentration that reduces impact strength and fatigue resistance.
• Which polarity provides deeper penetration and is typically used for most steel welding?
• The ___ test is a nondestructive testing procedure.
• Which nondestructive testing method uses induced currents in the test piece to reveal flaws?
• In GTAW, what factors influence penetration depth and how can you tailor technique to adjust depth?
• Which presentation is primarily used to display time-of-flight information along a line in nondestructive testing?
• Which statement best describes the relationship between the average weld stress and the reduction of the load-bearing cross-sectional area caused by a discontinuity?
• Why is TIG welding generally slower than other processes and how does this impact quality and project timelines?
• ___ examination does not reveal very narrow discontinuities that are not closely aligned (parallel) to the weld, such as laminations.
• Crater cracks are most commonly detected by ___ examination.
• The following statement is true or false: Most codes rely on ASME Section 1X and AWS D1.1 to describe the requirements for qualified welding procedures and welders.
• Which method, when coupled with riveting, increases fatigue strength?
• What is a key fire and safety consideration when TIG welding magnesium?
• Which process is useful when weld repair is too difficult or unsafe, such as in a storage tank with flammable vapors?
• What shielding gas options are used for GTAW and how do gas flow rate and gas purity influence weld quality?
• Why is purge gas important during aluminum GTAW welding, and what purge method is recommended?
• Wormholes can be prevented by using methods similar to those used to prevent porosity.
• In dye penetrant testing, what material is applied to a test surface to accelerate bleedout and enhance contrast of indications?
• Which inspection method uses a dye penetrant and ultraviolet light to reveal surface-breaking defects?
• The following statement is true or false: A replacement part is always preferable to repair welding, regardless of cost.
• Which nondestructive testing method uses a liquid penetrant to reveal surface defects?
• The process that converts an adhesive from the applied state to its final solid state is ___.
• A ferromagnetic material cannot be magnetized.
• How do you diagnose and troubleshoot common TIG weld defects in stainless steel butt joints (porosity, lack of fusion, undercut)?
• Some ___ may be allowed by certain welding codes.
• Insufficient penetration caused by weld metal running ahead of the arc can be prevented by ___.
• Cracks are most commonly located by ___ testing.
• Which statement describes cold mechanical repair?
• Which repair method uses thin sheets of corrosion-resistant material welded to a corroded surface to restore corrosion resistance?
• Slag inclusions can occur between passes or at the groove face.
• In a GTAW blueprint weld symbol, which details are decoded to plan the weld?
• Which examination method uses ionizing radiation to reveal internal discontinuities?
• Overlap need not be removed from a weld.
• Explain the concept of AC balance in TIG welding and how to optimize it for a given material.
• What is the consequence of insufficient root opening in GTAW?
• What test piece contains typical discontinuities that demonstrate calibration equipment detects the discontinuities for the part being inspected?
• The following statement is true or false: Preheating is sometimes used in repair welding to reduce residual stresses.
• ___ may be required after weld repair to restore mechanical properties.
• Demagnetization is always required after magnetic particle testing.
• Which defect is associated with tenacious surface oxide films on certain metals?
• Which statement about nondestructive testing is true?
• In a multi-pass GTAW butt weld, what is the primary purpose of the root pass?
• What is the permanent, visible image produced by penetrating radiation passing through a material?
• Demagnetization is the ability of a material to retain a portion of an applied magnetic field after the magnetizing force has been removed.
• A weld repair method that involves thin sheets of corrosion-resistant material welded to a corroded surface is ___.
• Which type of crack is associated with hydrogen embrittlement in steels?
• Which safety measure best reduces occupational exposure to fumes during GTAW?
• Which steps are typical post-weld cleaning steps for stainless steel to avoid corrosion?
• How can weld distortion be controlled in GTAW?
• A ___ joint contains insufficient adhesive to create an optimum bond.
• The following statement is true or false: Hardness is a key indicator of mechanical properties for carbon and alloy steels.
• GTAW is used for bronze bearing surfacing weld repair.
• Which examination method records an image by exposing photographic film or sensitized paper?
• Larger diameter filler metal is preferred to reduce heat input for reducing distortion.
• Root cracks are usually easy to detect.
• Cure time is the total time a penetrant is in contact with a component surface.
• A test consists of detecting acoustic signals produced by plastic deformation or crack formation during mechanical loading or thermal stressing of metals. Which test is this?
• Which presentation uses a horizontal baseline indicating distance or time, with a vertical deflection indicating the amplitude of the returning signal?
• In GTAW, which polarity concentrates heat in the electrode and is typically chosen for higher deposition and certain alloys or thin sections?
• Throat cracks are cold cracks that are confined to the edges of a weld.
• The following statement is true or false: Codes and standards for welding procedures and welders typically rely on multiple organizations, including AWS and ASME.
• A weld discontinuity is an interruption in the typical structure of a weld. Is this true or false?
• Which examination method uses a magnetic field and a finely divided powder to reveal defects?
• ___ requires that drillings be taken from the base metal and provides an accurate composition of the base metal.
• ___ analysis provides a diagnosis of the technical cause of failure using various analytical methods.
• What is the importance of groove preparation for a square-edge butt joint in TIG welding?
• If the AC balance is set too high toward cleaning, what is a likely weld effect?
• Which statement is true about porosity?
• What is the heat-affected zone (HAZ) in welding, and which GTAW parameters influence its width?
• ___ is a mechanical repair method in which a thinned, pitted, or cracked region of a part is ground away to create a gradual transition with the unaffected surface.
• How would you perform a visual inspection of a TIG butt weld and what indicators reveal acceptable weld quality?
• Describe the typical TIG bead profile for a root pass on a square-edge butt joint and how to judge sound weld quality.
• Which repair technique involves grinding away a damaged region to form a smooth transition with the undamaged surface?
• Which nondestructive testing method uses X rays and gamma rays to detect discontinuities?
• Which term describes a stress-concentrating condition caused by abrupt thickness changes (or discontinuities) in a structure?
• GTAW is typically used for surfacing weld repairs on large components.
• What is the purpose of bevel edges in a welded joint and how does it affect TIG welding quality?
• What is the typical shielding gas flow rate for GTAW and why does purity matter?
• Which nondestructive testing method uses a search unit to transmit energy into a test surface?
• The following statement is true or false: Selective plating is the joining of parts with an adhesive placed between the faying (mating) surfaces.
• Which welding variables are documented in a WPS?
• ___ time is the elapsed time between the application of a developer and the examination of a part.
• What is the primary purpose of shielding gas in GTAW?
• Which statement about crater cracks is correct?
• Cavities only occur on the surface of a weld.
• The following statement is true or false: A satisfactory adhesive bond requires close contact between the surfaces to be joined.
• Which repair method is appropriate for metals that are difficult to weld, such as cast iron?
• Why is tungsten contamination from copper problematic when welding copper alloys, and how can this be prevented?
• The following statement is true or false: Surface preparation is essential for adhesive bonding to achieve a satisfactory joint.
• Prods used for the prod method of magnetic particle examination must never be crisscrossed.
• ___ crack when exposed to sulfur compounds, such as grease or oil.
• What type of magnetization is produced by a straight conductor carrying current?
• Excess weld reinforcement establishes stress concentrations at the junction with the base metal.
• A couplant is a liquid substance used between a search unit and a test surface to permit or improve the transmission of ultrasonic energy.
• The application of a thin, hard, chrome coating to repair minor damage is ___.
• Which statement best describes shielding gas flow in TIG welding and its effects?
• Tungsten inclusions are particles from a nonconsumable tungsten electrode that enter the weld.
• To prevent porosity caused by moisture on the joint surface, one should ___ before welding.
• Describe the back-step and weave techniques in TIG welding and when to apply each.
• Root cracks are usually easy to detect.
• Which statement about bevel edges and TIG welding is accurate?
• Which factor most affects root penetration in a TIG butt weld?
• The following statement is true or false: Certain repairs may require the approval of authorized personnel, use of a qualified procedure, and/or preparation of supporting documentation.
• Which defect types are commonly associated with GTAW, and how can they be mitigated?
• In a pneumatic test, what is pressurized in a closed vessel to reveal leaks?
• What is the relationship between the Procedure Qualification Record (PQR) and a Welding Procedure Specification (WPS)?
• How should you shape the tungsten electrode for DCEN and for AC TIG welding, and why?
• What is the typical sequence for a multi-pass GTAW weld on a butt joint (root, fill, cap) and the purpose of each pass?
• The primary causes of porosity are dirt, rust, and moisture on the surface of the base metal.
• Which practice most directly reduces porosity risk in a TIG weld of stainless steel?
• In ultrasonic welding, a one complete reflection of an ultrasonic beam is called?
• If the load-bearing cross-sectional area increases, the resulting weld stress will:
• What are the benefits of pulsing and/or amperage ramping in GTAW and when would you use them?
• Which action prevents insufficient penetration due to weld metal running ahead of the arc?
• Which evaluation method seeks to identify how a component could fail and what the consequences would be, to prioritize improvements?
• A ___ crack is a crack that develops after solidification is complete.
• Underbead cracks are hydrogen cracks that occur in steels susceptible to hydrogen embrittlement during welding.
• A ___ is a stress-concentrating condition caused by an abrupt change in section thickness or in continuity of a structure.
• Which nondestructive testing method uses a magnetic field and iron particles to reveal defects?
• When welding aluminum with GTAW, why is AC current typically used and what is the role of balance control?
• Porosity caused by excessive moisture on the joint surface can be prevented by ___.
• In nondestructive testing, which method is primarily used to locate surface-breaking defects by applying a liquid penetrant?
• Which type of inclusion can occur between passes or at the groove face?
• Arc strike is the welding defect that results when the welder accidentally strikes the electrode on the base metal adjacent to the weld.
• To troubleshoot poor fusion at the base metal when TIG welding a stainless steel butt joint, which step is essential?
• Internal weld defects can be detected with radiographic testing equipment.
• Porosity usually consists of long cavities parallel to the root of the weld.
• Which device's demonstrated image determines radiographic quality and sensitivity?
• The following statement is true or false: Repair welding is used only if it is economical or if a replacement part is not available.
• Which examination method uses photographic film or sensitized paper to record results?
• Excess weld reinforcement can establish stress concentrations at the junction with the base metal.
• Which tungsten electrode type is favored for AC TIG welding of aluminum and magnesium?
• Cracks are the most serious discontinuities in weldments.
• In hydrostatic testing, what medium fills and pressurizes the vessel?
• Which statement about porosity is true?
• For stainless steel GTAW, which filler metals are commonly used and what polarity is typically applied for stability?
• What is crater cracking in TIG welding and how can it be prevented?
• Wormholes can be prevented by using methods similar to those used to prevent porosity.
• Oxide inclusions occur when welding metals that have tenacious surface oxide films, such as stainless steels, aluminum alloys, and titanium alloys.
• Identify tungsten electrode types and explain their suitability for different GTAW materials.
• ___ analysis provides a diagnosis of a technical cause of failure using experience gained from previous failures.
• The following statement is true or false: Failure analysis provides an accurate explanation of the cause of a failure or loss of performance.
• Visual examination is a form of nondestructive testing.
• What are the typical welding positions and how does bead direction and electrode angle change with position in TIG?
• ___ repair does not involve a significant heat input.
• Which option best describes the notch effect as used in welding terminology?
• In a hydrostatic test, closed containers are filled with water and a predetermined test pressure is applied. What is the test medium?
• What practice helps avoid tungsten contamination when welding copper alloys?
• Which examination method uses dyes to locate surface defects?
• How does preheating affect welding of high carbon steels with GTAW?
• Artifact on radiographs is best described as what?
• ___ occurs when the welder accidentally strikes the electrode on the base metal adjacent to the weld.
• How does electrode contamination occur in GTAW, and what steps prevent it?
• Which description best defines a sound TIG root pass on a square-edge butt joint?
• What special considerations apply to TIG welding magnesium or titanium in terms of shielding gas, prep, and safety?