Material Testing: Tensile
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Questions and Answers

What is the unit of the given hardness number in Vickers Hardness test?

  • HB
  • HV (correct)
  • HR
  • BHN
  • Which of the following hardness tests uses a spherical or sphero-conical indenter?

  • Charpy Impact Test
  • Rockwell Hardness test (correct)
  • Brinnell Hardness test
  • Vickers Hardness test
  • What is the ability of a material to withstand shock loading?

  • Yield Strength
  • Ductility
  • Impact Strength (correct)
  • Tensile Strength
  • Which of the following hardness tests is used for most metals and uses a 10 mm steel or WC ball indenter?

    <p>Brinnell Hardness test</p> Signup and view all the answers

    What is the formula for notch impact energy in Charpy Impact Test?

    <p>𝑲𝑽 = 𝒎𝒈(𝑯 − 𝒉)</p> Signup and view all the answers

    What is the first step in the Rockwell Hardness test?

    <p>Apply the minor load</p> Signup and view all the answers

    What is the approximate tensile stiffness of steel?

    <p>200 GPa</p> Signup and view all the answers

    Which type of fracture occurs in materials that resist deformation?

    <p>Brittle fracture</p> Signup and view all the answers

    What is the term for the ability of a material to absorb energy and deform plastically without fracturing?

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

    What is the purpose of hardness testing in material science?

    <p>To provide an approximate value of ultimate tensile strength</p> Signup and view all the answers

    What is the name of the scale used to characterize the hardness of polymers?

    <p>Shore hardness scale</p> Signup and view all the answers

    Which of the following materials is used as a reference mineral in the Mohs hardness scale?

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

    What is the relationship between the ultimate tensile strength (UTS) of a material and its Brinell hardness number (BHN)?

    <p>UTS = 3.4 × BHN</p> Signup and view all the answers

    What is the term for the deformation of a material under tension, resulting in a localized reduction in cross-sectional area?

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

    What does a tensile test primarily measure?

    <p>Resistance to tensile load</p> Signup and view all the answers

    Which of the following is a characteristic of plastic deformation?

    <p>It is partially recoverable</p> Signup and view all the answers

    What is the modulus of elasticity (Young's modulus) equivalent to in a stress-strain curve?

    <p>The ratio of stress to strain</p> Signup and view all the answers

    Which property measures a material's resistance to elastic deformation?

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

    In the stress-strain curve, what does the symbol $\sigma_{0.2%}$ represent?

    <p>Proof strength</p> Signup and view all the answers

    How is ductility commonly measured from the stress-strain curve?

    <p>Percentage elongation</p> Signup and view all the answers

    What does the ultimate tensile strength ($\sigma_{UTS}$) signify?

    <p>Maximum stress a material can withstand before failing</p> Signup and view all the answers

    What type of test is a visual test (VT) considered as?

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

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