MCE132 Basic Properties of Engineering Materials Quiz

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Questions and Answers

What do mechanical properties of materials describe?

  • The origin of materials under different types of loads
  • The behavior of materials under different types of loads (correct)
  • The weight of materials under different types of loads
  • The color of materials under different types of loads

Which type of loading involves a force applied rapidly causing an impact?

  • Static Loading
  • Dynamic Loading (correct)
  • Repeated Loading
  • Delayed Loading

What is stress in the context of mechanical properties of materials?

  • The temperature of the material
  • The length of the material
  • The intensity of internal forces (correct)
  • The volume of the material

What is strain in the context of mechanical properties of materials?

<p>A dimensionless value representing the change in length relative to the original length (C)</p> Signup and view all the answers

Which type of loading involves a force applied repeatedly, causing variation in the magnitude and sometimes the direction of internal forces?

<p>Repeated Loading (B)</p> Signup and view all the answers

What are the units for stress typically expressed in?

<p>$N/mm^2$ (MPa) (A)</p> Signup and view all the answers

What is the definition of normal stress?

<p>Stress normal to the section, could be tension or compression stress (B)</p> Signup and view all the answers

How is strength of a material measured?

<p>By the maximum stress (C)</p> Signup and view all the answers

What is the point in the stress-strain curve where plastic deformation begins?

<p>Yield or proof stress (A)</p> Signup and view all the answers

What is elasticity defined as?

<p>Ability of a material to return to its original shape and dimensions after removing the applied load (B)</p> Signup and view all the answers

What is stiffness a measure of?

<p>Resistance to deformations (A)</p> Signup and view all the answers

What is Poisson's ratio?

<p>The ratio between lateral strain and axial strain (B)</p> Signup and view all the answers

What does ductility measure?

<p>% Reduction in area in Tension test of steel (C)</p> Signup and view all the answers

What characterizes brittle materials?

<p>Failure almost without deformations (D)</p> Signup and view all the answers

What does hardness measure?

<p>Resistance to any indentation or scratch caused by any type of load (A)</p> Signup and view all the answers

What is shear stress?

<p>Stress parallel to the section. (C), Stress parallel to the section. (D)</p> Signup and view all the answers

What type of loading involves a force applied slowly to an assembly or object?

<p>Static Loading (B)</p> Signup and view all the answers

What is the unit of stress typically expressed in?

<p>$N/mm^2 (MPa)$ (B)</p> Signup and view all the answers

What is the measure of the intensity of internal forces?

<p>Stress (A)</p> Signup and view all the answers

What is the ratio between the change of length to the original length called?

<p>Strain (A)</p> Signup and view all the answers

Which type of loading involves a force applied repeatedly, causing variation in the magnitude and sometimes in the sense of the internal forces?

<p>Repeated Loading (A)</p> Signup and view all the answers

What is the dimensionless value that is the ratio between the change of length to the original length?

<p>Strain (D)</p> Signup and view all the answers

What is the definition of ductility?

<p>The maximum percentage of deformation a material can undergo (B)</p> Signup and view all the answers

What does Poisson's ratio measure?

<p>The ratio between lateral strain and axial strain (D)</p> Signup and view all the answers

Which type of loading involves a force applied rapidly causing an impact?

<p>Dynamic loading (C)</p> Signup and view all the answers

What is the measure of the intensity of internal forces?

<p>Stress (C)</p> Signup and view all the answers

What does hardness measure?

<p>The material's surface resistance to indentation or scratch (B)</p> Signup and view all the answers

What is the dimensionless value that is the ratio between the change of length to the original length?

<p>Poisson's ratio (D)</p> Signup and view all the answers

What characterizes brittle materials?

<p>Failure without deformations (C)</p> Signup and view all the answers

8

<p>What type of loading involves a force applied repeatedly, causing variation in the magnitude and sometimes in the sense of the internal forces? (D)</p> Signup and view all the answers

What is elasticity defined as?

<p>Ability of a material to return to its original shape and dimensions after removing the applied load (B)</p> Signup and view all the answers

What is strain in the context of mechanical properties of materials?

<p>The ratio between lateral strain and axial strain (D)</p> Signup and view all the answers

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