Material Testing Specifications: Tension and Bend Tests

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Questions and Answers

If the original tension specimen results are close to the specified requirements, what is permitted?

  • Disregarding the specified requirements entirely
  • Performing a retest on specimens from a different lot
  • Accepting the original results without further testing
  • A retest on two random specimens from the same lot (correct)

If a bend test fails for reasons other than mechanical issues or specimen flaws, what action should be taken?

  • Retest on two random specimens from the same lot at a temperature not less than 60°F (16°C) (correct)
  • Retest on two random specimens from the same lot at room temperature
  • Conduct the retest on specimens from a different lot
  • Discard the entire lot without retesting

If a weight (mass) test fails for reasons other than specimen flaws, what is the appropriate action?

  • Discard the entire lot without retesting
  • Repeat the weight test on the same specimen
  • Retest on specimens from a different lot
  • Retest on two random specimens from the same lot (correct)

Under what condition(s) is a tension test considered invalid?

<p>If the elongation property is less than specified, and the fracture is outside the middle half of the gage length (D)</p>
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What is the purpose of retesting on random specimens from the same lot?

<p>To check for consistency within the lot (D)</p>
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How many retest specimens are required if the original test fails for a valid reason?

<p>Two retest specimens (C)</p>
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