Welding Microstructures and Metal Composition Quiz
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Questions and Answers

What is the fuel gas generally employed in gas welding?

  • Oxygen
  • Hydrogen
  • Acetylene (correct)
  • Propane
  • Which type of flame is considered the most versatile and hottest in welding?

  • Oxy-acetylene flame (correct)
  • Butane flame
  • Propane flame
  • Hydrogen flame
  • What is the temperature reached by the oxy-acetylene flame used in welding?

  • $2500°C$
  • $2000°C$
  • $3300°C$ (correct)
  • $4000°C$
  • What is added to the molten metal pool in gas welding to build up the seam slightly for greater strength?

    <p>Filler metal rod</p> Signup and view all the answers

    Why is the correct type of flame considered essential in oxy-acetylene welding?

    <p>To control welding joint and process</p> Signup and view all the answers

    Which property of a metal indicates the ease with which it can be welded with other similar or dissimilar metals?

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

    What is the best weldability metal amongst metals according to the text?

    <p>Plain low carbon steel</p> Signup and view all the answers

    Which factor does NOT influence the weldability of a material?

    <p>Electrical conductivity</p> Signup and view all the answers

    What is generally observed about materials with high castability in relation to weldability?

    <p>They have low weldability</p> Signup and view all the answers

    Which terminological element refers to the joining surfaces of metals being prepared first for welding?

    <p>Edge preparation</p> Signup and view all the answers

    In welding butt joints, which edge preparation involves a single bevel?

    <p>Single-U</p> Signup and view all the answers

    What happens to the composition of crystals as they freeze during welding?

    <p>They readjust their composition to that of the initial liquid alloy.</p> Signup and view all the answers

    Which welding process is particularly well-suited for joining rails?

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

    What is a common issue that arises in the final weld due to the cooling of the metal?

    <p>Presence of gas pockets and porosity</p> Signup and view all the answers

    Which industry commonly utilizes cold pressure welding?

    <p>Food processing industry</p> Signup and view all the answers

    What type of welding process is more prevalent in the aeronautical and nuclear industries?

    <p>Gas tungsten arc welding</p> Signup and view all the answers

    Which type of welding is considered a general purpose process with a wide range of applications?

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

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