Mechanical Engineering Fourth Year First Term Marks Distribution Quiz
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Questions and Answers

What is the primary purpose of failure analysis?

  • To identify the operating loads causing failure
  • To find the root cause of a failure (correct)
  • To collect data on material failures
  • To determine the environmental conditions leading to failure

    • Which of the following is NOT considered a harsh environment leading to material failure?

  • High pressure environment
  • Low humidity environment (correct)
  • Corrosive environment
  • High temperature environment

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

  • Corrosive loading and frictional impact
  • Chemical reaction and thermal expansion loading
  • Temperature variation and high pressure loading
  • Stress, impact, and frictional loading (correct)

    • What is the focus of Chapter (1) 'Failure Analysis- An Overview'?

    <p>Introduction to failure analysis procedure</p> Signup and view all the answers

    Which type of material failure is associated with stress concentration and fracture toughness?

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

    What are the primary causes leading to material failure?

    <p>Environmental conditions and operating loads</p> Signup and view all the answers

    What is the first critical step in the failure analysis procedure?

    <p>Detection and data collection</p> Signup and view all the answers

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

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

    What is a potential cause of failure according to Dr. Reham Reda Abbas?

    <p>Unexpected operating conditions</p> Signup and view all the answers

    What can be avoided by correct design, selecting appropriate materials, correct processing, and consideration of service environment?

    <p>Many failures</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 affects the strength during the welding of cold rolled sheets?

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

    What is the first step of failure analysis procedure?

    <p>Detection, collect data (loading situation, records, drawings, repair history), and description of failure situation (damage)</p> Signup and view all the answers

    What is the last step of failure analysis procedure?

    <p>Write report</p> Signup and view all the answers

    Failure analysis is the process of collecting data and analyzing it to determine the root cause of a failure.

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

    Environmental conditions and operating loads are often the primary causes leading to a material’s failure.

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

    Stress, impact, and frictional loading are examples of operating conditions that frequently cause material failure.

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

    Chapter (1) 'Failure Analysis- An Overview' discusses the Failure Analysis Procedure in detail.

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

    Failure Due To Overload covers subjects such as Distortion, Fracture, Crack Propagation, and Stress Concentration.

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

    The primary purpose of failure analysis is to reveal the depth of hardening, grain size, phase present, non-metallic inclusions, and porosities.

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

    Selecting appropriate materials depends on fatigue conditions, stress-rupture time, and temperature range of operation.

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

    Cold working and forging can create cracks, flaws, and distortion during the processing of materials.

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

    Quenched and tempered materials lose strength at higher temperatures.

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

    Age-hardened materials lose strength at high temperature.

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

    Improper or lack of inspection and quality control is one of the failure causes mentioned in the text.

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

    Faulty heat treatments can be a cause of material failure according to Dr. Reham Reda Abbas.

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

    Properly selecting the material or material system is the first critical step in failure prevention mentioned in the text.

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

    Metallographic examination can reveal the depth of hardening, grain size, phase present, non-metallic inclusions, and porosities.

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

    Loading situation can be used to evaluate the magnitude of stress according to Dr. Reham Reda Abbas.

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

    Inadequate environmental control is a potential harsh environment leading to material failure mentioned in the text.

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

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