Mechanical Engineering Department Marks and Hours Distribution Quiz
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Questions and Answers

What is the primary focus of failure analysis?

  • Manufacturing products
  • Collecting and analyzing data to determine the root cause of a failure (correct)
  • Designing new materials
  • Conducting experiments

    • Which of the following is NOT an example of a harsh environment that commonly induces failure?

  • Corrosive environment
  • Chemically inert environment (correct)
  • Low humidity environment
  • High temperature environment

    • What are examples of operating conditions that frequently cause material failure?

  • Chemical stability
  • Exposure to sunlight
  • Stress, impact, and frictional loading (correct)
  • High humidity

    • In failure analysis, what are environmental conditions and operating loads often considered as?

    <p>Primary causes leading to a material’s failure</p> Signup and view all the answers

    What is the main objective of failure analysis?

    <p>To determine the root cause of a failure</p> Signup and view all the answers

    What does fracture toughness relate to in the context of material failure?

    <p>Resistance to impact forces</p> Signup and view all the answers

    Which of the following is the first critical step in failure prevention according to the text?

    <p>Selecting appropriate materials</p> Signup and view all the answers

    Which method can be used to reveal depth of hardening, grain size, phase present, non-metallic inclusions, and porosities?

    <p>Metallographic examination</p> Signup and view all the answers

    What does quenched and tempered materials lose strength at?

    <p>Higher temperature</p> Signup and view all the answers

    Which of the following is NOT mentioned as a cause of failure?

    <p>Correct processing</p> Signup and view all the answers

    What affects the strength of age-hardened materials?

    <p>High temperature</p> Signup and view all the answers

    What is used to detect crack initiation, fatigue striations, and fracture modes?

    <p>Scanning electron microscope (SEM)</p> Signup and view all the answers

    What may create gas porosity and segregation during processing?

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

    What involves designing for maximum stress including safety factor and avoiding stress raisers?

    <p>(Correct) design</p> Signup and view all the answers

    What method is used to analyze the phases, inclusions, and corrosion products?

    <p>(SEM/EDX) Microanalysis</p> Signup and view all the answers

    What are examples of failure causes mentioned in the text?

    <p>(Fabrication) defects and faulty heat treatments</p> Signup and view all the answers

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