GD&T Terminology Quiz
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Questions and Answers

What is the difference between upper deviation and lower deviation?

  • Upper deviation is the minimum limit, while lower deviation is the maximum limit
  • Upper deviation is always positive, while lower deviation is always negative
  • Upper deviation is the difference from minimum size, while lower deviation is the difference from maximum size (correct)
  • Upper deviation is for shafts, while lower deviation is for holes

    • What does bilateral tolerance mean?

  • Variation allowed only in the lower limit
  • Variation allowed on either sides of the zero line (correct)
  • Variation allowed only on one side of the zero line
  • Variation allowed only in the upper limit

    • What is the fundamental deviation?

  • The deviation closest to the basic size (correct)
  • The biggest deviation possible
  • A deviation that is always negative
  • A deviation that allows maximum variation

    • What does positive allowance mean in terms of holes and shafts?

    <p>There is minimum clearance between the parts</p> Signup and view all the answers

    In unilateral tolerance, where is variation allowed?

    <p>Only on one side of the zero line</p> Signup and view all the answers

    What does negative allowance result in?

    <p>Interference between shaft and hole</p> Signup and view all the answers

    What type of fit may result in either a clearance or interference condition?

    <p>Transition fit</p> Signup and view all the answers

    In an interference fit, the allowance is:

    <p>Always negative</p> Signup and view all the answers

    What is the interference between the largest shaft and the smallest hole?

    <p>0.009&quot;</p> Signup and view all the answers

    Which type of fit is called for when accurate alignment is critical?

    <p>Transition fit</p> Signup and view all the answers

    What amount of actual interference exists between the smallest shaft and the largest hole?

    <p>0.0007&quot;</p> Signup and view all the answers

    What is the significance of a slip or push fit?

    <p>Facilitates self-alignment of parts</p> Signup and view all the answers

    What is the purpose of the GD&T method?

    <p>To control location, form, profile, orientation, and runout on a dimensioned feature</p> Signup and view all the answers

    In the hole-basis system, what is considered the basic size?

    <p>Minimum hole size</p> Signup and view all the answers

    In the GD&T system, what does the 'h' denote?

    <p>Basic size of the shaft</p> Signup and view all the answers

    What is the symbol denoting the hole-basis system?

    <p>'H'</p> Signup and view all the answers

    How is the maximum shaft size determined in the hole-basis system?

    <p>Subtracting an allowance from the basic hole size</p> Signup and view all the answers

    What is the minimum clearance value in the GD&T hole and shaft system?

    <p>0.002&quot;</p> Signup and view all the answers

    How are tolerances applied to the hole and shaft in the GD&T system?

    <p>To both the hole and shaft</p> Signup and view all the answers

    What is the purpose of applying different tolerances to the hole and shaft in the hole-basis system?

    <p>To achieve minimum and maximum dimensions for both hole and shaft</p> Signup and view all the answers

    Which deviation is associated with the shaft-basis system?

    <p>Upper deviation</p> Signup and view all the answers

    What type of industries commonly use the GD&T system?

    <p>Industries using bright bars as raw material</p> Signup and view all the answers

    What is a key advantage of the hole-basis system according to the text?

    <p>Fixed dimensions for holes and shafts</p> Signup and view all the answers

    Why is the GD&T method especially useful in quantity production of interchangeable parts?

    <p>To ensure proper assembly and interchangeability of parts</p> Signup and view all the answers

    What type of fit allows for loose mating and free movement between parts?

    <p>Clearance fit</p> Signup and view all the answers

    In which type of fit does the internal member have a larger size than the external member?

    <p>Interference fit</p> Signup and view all the answers

    What is the minimum air space in a clearance fit according to E.G. Anas ME 414?

    <p>0.002 inches</p> Signup and view all the answers

    Which type of fit requires some degree of force to join two components?

    <p>Interference fit</p> Signup and view all the answers

    What is the purpose of using an interference fit?

    <p>To create a tight connection between components</p> Signup and view all the answers

    Where would you find examples of a clearance fit according to the text?

    <p>Bolt/shaft holes</p> Signup and view all the answers

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