Welding Standards and Symbols Quiz
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Questions and Answers

What is the classification number for Metal Inert Gas (MIG) welding according to EN ISO 4063?

  • #135
  • #138
  • #131 (correct)
  • #139

    • What is the composition accuracy for minor constituents from 5 to 50% (by volume) of shielding gases?

  • $\pm 0.5%$
  • $\pm 10%$ (correct)
  • $\pm 15%$
  • $\pm 5%$

    • What is the designation for the gas composition 90% Ar - 10% CO2?

  • M21 (correct)
  • M20
  • M22
  • M19

    • What is the welding position standard according to EN ISO 6947?

    <p>EN ISO 6947</p> Signup and view all the answers

    What does WN 10570 describe?

    <p>Visual inspection requirements, symbols and dimensioning, and shielding gases for arc welding of steel components</p> Signup and view all the answers

    What is the purpose of assessment groups in WN 10570?

    <p>To assign appropriate acceptance criteria level for welds based on design and service requirements</p> Signup and view all the answers

    What is the significance of WN 10570-E?

    <p>It allows certain irregularities in welds due to production conditions and does not require volumetric inspection</p> Signup and view all the answers

    What does Annex A of WN 10570 specify?

    <p>Recommended assessment groups for lift truck components based on design and safety requirements</p> Signup and view all the answers

    What certification must manufacturers hold for welding company requirements?

    <p>EN ISO 3834</p> Signup and view all the answers

    Which assessment groups require welded components to be traceable back to the welder?

    <p>EN ISO 5817 assessment groups 'B' or 'C'</p> Signup and view all the answers

    What is required to qualify welds classified as EN ISO 5817 assessment groups 'B' or 'C'?

    <p>Preproduction welding test in accordance with EN ISO 15613</p> Signup and view all the answers

    When are tolerances required for production not applicable?

    <p>Robotic welding</p> Signup and view all the answers

    How is compliance with other standards verified?

    <p>By showing equivalence to the standard used</p> Signup and view all the answers

    What does the standard EN 22553 include?

    <p>Practical rules and application for drawing up weld seam tables</p> Signup and view all the answers

    What does the standard cover regarding symbols and dimensioning?

    <p>Basic, composite, and supplementary symbols</p> Signup and view all the answers

    What is included in the standard regarding the side of the joint and dimensioning of welds?

    <p>Rules for depicting the side of the joint and dimensioning of welds</p> Signup and view all the answers

    What does the standard specify regarding the range of application for welding processes?

    <p>Range of application for welding processes, shielding gases, and filler materials used</p> Signup and view all the answers

    Where can the base metals for welding be found in the standard?

    <p>Annex B of the standard</p> Signup and view all the answers

    What does the standard provide regarding welding methods?

    <p>Terminology and requirements for welding methods</p> Signup and view all the answers

    What is the maximum magnification for examining imperfections per EN ISO 5817?

    <p>10X</p> Signup and view all the answers

    What should the inspector assure regarding the size, length, and location of welds?

    <p>Conformance to the requirements of the drawings</p> Signup and view all the answers

    When are limits for multiple imperfections applicable according to EN ISO 5817?

    <p>Only when requirements for a single imperfection are not exceeded</p> Signup and view all the answers

    What is the purpose of using visual aids such as auxiliary lighting and magnifiers in visual welding inspection?

    <p>To closely evaluate irregularities in welds and base metals</p> Signup and view all the answers

    What is the assessment criteria for weld discontinuities and defects in visual welding inspection?

    <p>EN ISO 5817</p> Signup and view all the answers

    What should the inspector check regarding the size and contour of welds in visual welding inspection?

    <p>Size and contour</p> Signup and view all the answers

    What is the maximum distance for two adjacent imperfections to be considered as a single imperfection?

    <p>Twice the major dimension of the smaller imperfection</p> Signup and view all the answers

    When are visual aids such as auxiliary lighting and magnifiers required in visual welding inspection?

    <p>When necessary to more closely evaluate irregularities in welds and base metals</p> Signup and view all the answers

    What is the term used to describe an interruption of the typical structure of a material, such as a lack of homogeneity in its mechanical, metallurgical, or physical characteristics?

    <p>Discontinuity</p> Signup and view all the answers

    Which type of crack is generally considered to be the most critical type of discontinuity in welding?

    <p>Longitudinal</p> Signup and view all the answers

    What is the acceptance criteria for cracks according to EN ISO 5817?

    <p>Not permitted</p> Signup and view all the answers

    What is the acceptance criteria for cracks according to AWS D14.4?

    <p>None</p> Signup and view all the answers

    What is another term for Incomplete Fusion (IF) as per EN ISO 5817?

    <p>Lack of Penetration (LOP)</p> Signup and view all the answers

    What is the acceptance criteria for Incomplete Fusion (IF) according to EN ISO 5817?

    <p>Not permitted</p> Signup and view all the answers

    What is the acceptance criteria for Incomplete Fusion (IF) according to AWS D14.4?

    <p>Sum of all indications shall not exceed 1 in [25 mm] in 12 in [300 mm]</p> Signup and view all the answers

    What is the alternate term for Incomplete Joint Penetration (IJP) as per EN ISO 5817?

    <p>Lack of Penetration (LOP)</p> Signup and view all the answers

    What is the acceptance criteria for Incomplete Joint Penetration (IJP) according to EN ISO 5817?

    <p>Not permitted in CJP welds</p> Signup and view all the answers

    What is the acceptance criteria for Incomplete Joint Penetration (IJP) according to AWS D14.4?

    <p>1/3T or ½ in [13 mm] maximum length</p> Signup and view all the answers

    What is the acceptance criteria for inclusions with GMAW according to EN ISO 5817?

    <p>Not permitted on surface; some amounts permitted subsurface</p> Signup and view all the answers

    What is the acceptance criteria for inclusions with GMAW according to AWS D14.4?

    <p>Not permitted on surface; some amounts permitted subsurface</p> Signup and view all the answers

    What is the maximum permitted root opening for fillet welds according to EN ISO 5817?

    <p>1/64 in [0.5 mm] + 0.1a</p> Signup and view all the answers

    What is the definition of fillet weld size for equal leg fillet welds according to VT Application - ISO 5817?

    <p>The leg lengths of the largest isosceles right triangle that can be inscribed within the fillet weld cross section</p> Signup and view all the answers

    What feature of a convex fillet weld limits the maximum size of the inscribed triangle?

    <p>Leg length</p> Signup and view all the answers

    What does the measurement technique for fillet weld size need to be capable of determining?

    <p>The size of the inscribed triangle</p> Signup and view all the answers

    What does the standard EN ISO 5817 specify regarding arc strikes?

    <p>Arc strikes are to be avoided. If present, they shall be ground flush and checked to assure soundness</p> Signup and view all the answers

    What do fillet weld gages need to account for according to VT Application - ISO 5817?

    <p>Different shapes of fillet weld profiles</p> Signup and view all the answers

    What is the maximum permitted for measurement of convex fillet welds according to VT Application - ISO 5817?

    <p>5/8 in</p> Signup and view all the answers

    What is the purpose of measuring the triangle inside the fillet weld according to VT Application - ISO 5817?

    <p>To determine the fillet weld size</p> Signup and view all the answers

    What does the standard EN ISO 5817 specify regarding spatter?

    <p>Metal particles expelled during fusion welding that do not form part of the weld</p> Signup and view all the answers

    What is the maximum permitted root gap for fillet welds according to AWS D14.4?

    <p>3/16 in [5mm]; when &gt; 1/16 in [2 mm] required leg size shall be increased by amount of the gap</p> Signup and view all the answers

    What is the definition of porosity in welding?

    <p>A cavity-type weld discontinuity formed by trapped gas during solidification</p> Signup and view all the answers

    What does undercut refer to in welding?

    <p>A groove melted into the base metal adjacent to the weld toe or root</p> Signup and view all the answers

    What is the definition of overlap in welding?

    <p>The protrusion of weld metal beyond the weld toe or root</p> Signup and view all the answers

    What is the definition of convexity in fillet welds?

    <p>The excess weld metal in butt welds</p> Signup and view all the answers

    What is the definition of weld reinforcement in butt welds?

    <p>Excess weld metal in butt welds</p> Signup and view all the answers

    What is the definition of arc strike in welding?

    <p>A discontinuity resulting from an arc</p> Signup and view all the answers

    What is the acceptance criteria for porosity according to EN ISO 5817?

    <p>Maximum single pore size and maximum cluster diameter</p> Signup and view all the answers

    What does underfill refer to in welding?

    <p>Incompletely filled groove weld condition</p> Signup and view all the answers

    What is the specific acceptance criteria for undercut according to EN ISO 5817?

    <p>Maximum depth</p> Signup and view all the answers

    According to EN ISO 5817, what is the acceptance criteria for overlap?

    <p>Not permitting overlap</p> Signup and view all the answers

    What does visual inspection of welds according to ISO 5817 include?

    <p>The evaluation and measurement of different discontinuities and weld conditions using specific tools and criteria</p> Signup and view all the answers

    Study Notes

    Welding Standards and Symbols: Key Highlights

    • Manufacturers must hold EN ISO 3834 certification for welding company requirements
    • Welded components in compliance with EN ISO 5817 assessment groups "B" or "C" shall be traceable back to the welder
    • Welds classified as EN ISO 5817 assessment groups "B" or "C" shall be qualified using a preproduction welding test in accordance with EN ISO 15613
    • Tolerances required for production are not applicable for robotic welding
    • Compliance with other standards must show equivalence to the standard used
    • Compliance with the standard is verified through visual inspection or measuring representative sections
    • The standard is an extract from EN 22553 (~ ISO 2553) and includes practical rules and application for drawing up weld seam tables
    • Symbols and dimensioning are covered in the standard, including basic, composite, and supplementary symbols
    • Rules for depicting the side of the joint and dimensioning of welds are included
    • The standard specifies the range of application for welding processes, shielding gases, and filler materials used
    • Annex B of the standard lists the base metals for welding
    • The standard provides terminology and requirements for welding methods

    Visual Inspection of Welds According to ISO 5817

    • Porosity is a cavity-type weld discontinuity formed by trapped gas during solidification, with types such as isolated, scattered, piping, elongated, aligned, and cluster.
    • Acceptance criteria for porosity according to EN ISO 5817 includes maximum single pore size and maximum cluster diameter, with different limits for weld width.
    • Undercut is a groove melted into the base metal adjacent to the weld toe or root, with specific acceptance criteria for maximum depth according to EN ISO 5817 and AWS D14.4.
    • Underfill refers to incompletely filled groove weld condition, with acceptance criteria for maximum depth according to EN ISO 5817 and AWS D14.4.
    • Overlap is the protrusion of weld metal beyond the weld toe or root, with EN ISO 5817 not permitting overlap and AWS D14.4 allowing none.
    • Convexity in fillet welds has specific acceptance criteria for maximum permitted dimensions according to EN ISO 5817 and no limit according to AWS D14.4, controlled by the limit on toe reentrant angle.
    • Weld reinforcement is the excess weld metal in butt welds, with specific acceptance criteria based on the angle of reinforcement for both EN ISO 5817 and AWS D14.4.
    • Arc strike is a discontinuity resulting from an arc, with specific characteristics and associated processes.
    • Visual inspection of welds according to ISO 5817 includes the evaluation and measurement of different discontinuities and weld conditions using specific tools and criteria.
    • Different acceptance criteria and limits for various discontinuities and weld conditions are outlined in ISO 5817 and AWS D14.4, providing standards for weld quality assessment.
    • The evaluation of welds according to ISO 5817 involves understanding the specific characteristics and measurement methods for different discontinuities and weld conditions.
    • ISO 5817 sets specific standards and criteria for the visual inspection and evaluation of weld discontinuities and conditions, providing guidelines for assessing weld quality.

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    Description

    Test your knowledge of welding standards and symbols with this quiz. Explore key highlights such as EN ISO 3834 certification, EN ISO 5817 assessment groups, preproduction welding tests, robotic welding tolerances, visual inspection, and more.

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