Orthographic Writing Chapter 5 Quiz
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Questions and Answers

Which of the following is a purpose of using convention practices in orthographic writing?

  • To save drawing space (correct)
  • To reduce the viewer's effort in understanding
  • To make the drawing more complicated
  • To eliminate the need for dimensioning

    • Incompleted side views include features that are clearly visible from the selected viewing direction.

    False (B)

    What is a commonly accepted practice that disregards some strict rules of orthographic projection?

    Convention

    An _______ view is when only part of the view is depicted in orthographic writing.

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

    Match the types of convention practices with their descriptions:

    <p>Alternate position of side view = Improves clarity when depth is large Aligned view = Orthographic views are arranged along a common line Enlarged view = Provides a more detailed representation of a part Cylinder intersection = Represents holes or cuts in cylindrical shapes</p> Signup and view all the answers

    What is the benefit of using a dash line in representing hidden edges?

    <p>It clearly distinguishes hidden and visible edges (B)</p> Signup and view all the answers

    The aligned view is a type of convention practice that disregards the relationship between different views.

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

    List two types of incompleted views.

    <p>Partial view, Half view</p> Signup and view all the answers

    What is the purpose of a partial view?

    <p>To represent portions of the part that need clarification (A)</p> Signup and view all the answers

    A half view displays the complete features of an object.

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

    What does a local view show?

    <p>Only the features that need to be clarified.</p> Signup and view all the answers

    An ____ view is created by rotating the object's features around the symmetry axis.

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

    Which of the following statements about the symmetry symbol is true?

    <p>It is a thin line that shows a line of symmetry. (C)</p> Signup and view all the answers

    Match the view types with their definitions:

    <p>Partial view = Represents portions needing clarification Half view = Illustrates only one half of the part Local view = Shows only specific features Aligned view = Rotated projection about symmetry axis</p> Signup and view all the answers

    In conventional practice, symmetrical features should be shown in true size from the symmetry axis.

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

    A half view allows for the inclusion of a ____ line when needed.

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

    What is the purpose of an enlarged view in orthographic projection?

    <p>To provide a detailed view of a selected part (B)</p> Signup and view all the answers

    The non-existing line of intersection appears when fillets and rounds are absent.

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

    What must be specified for an enlarged view?

    <p>Name and scale used</p> Signup and view all the answers

    The ______ gives the impression that a hole is located at the center of the plate.

    <p>aligned convention</p> Signup and view all the answers

    What does the aligned convention help to depict when viewing holes?

    <p>Holes at unsymmetrical positions (A)</p> Signup and view all the answers

    Match the following terms with their definitions:

    <p>Enlarged view = A view drawn with a larger scale Aligned convention = Gives impression of position Non-existing line of intersection = Line eliminated by fillets and rounds Orthographic projection = Systematic way to represent 3D objects</p> Signup and view all the answers

    What is a characteristic of an orthographic projection?

    <p>It represents three-dimensional objects in two dimensions</p> Signup and view all the answers

    An enlarged view is always created by scaling down parts of the drawing.

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

    What unit is adopted for length dimension in the JIS and ISO standards?

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

    Dimension figures can be placed using both the aligned method and unidirectional method on the same drawing.

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

    What is the purpose of dimensioning in manufacturing?

    <p>To add size and location information necessary to manufacture the object.</p> Signup and view all the answers

    Angular dimension is represented in degrees with the symbol __________ placed behind the figures.

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

    Match the following dimensioning methods with their descriptions:

    <p>Aligned method = Figures are readable from the bottom and right side. Unidirectional method = Figures are readable only from the bottom.</p> Signup and view all the answers

    What is a common purpose of dimensioning in engineering design?

    <p>To specify part information such as sizes and locations (A)</p> Signup and view all the answers

    Which of the following is a common mistake in dimensioning?

    <p>Placing dimension figures too far from features (C)</p> Signup and view all the answers

    The metric system can be used in dimensioning practices.

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

    What is the aligned method in dimensioning?

    <p>A method where dimension figures are placed so they are readable from the bottom and right side of the drawing.</p> Signup and view all the answers

    Name one type of line used in dimensioning.

    <p>Extension line</p> Signup and view all the answers

    Dimensions of angles are typically represented in degrees followed by the symbol __________.

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

    Dimensioning is the process of specifying a part's information by using figures, symbols, and _____.

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

    Match the following dimensioning components with their descriptions:

    <p>Dimension lines = Indicate the direction and extent of a dimension Extension lines = Indicate the location of the features being dimensioned Leader lines = Indicate details of features with a local note Dimension figures = Represent the actual size of the dimension</p> Signup and view all the answers

    Which of the following is NOT a component of dimensioning?

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

    Dimension lines should be spaced closely together for clarity in the drawing.

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

    What is the purpose of leader lines in dimensioning?

    <p>To indicate details of features with a local note</p> Signup and view all the answers

    What does the letter 'R' signify when dimensioning arcs?

    <p>Radius of the arc (D)</p> Signup and view all the answers

    To dimension a hole, only its diameter is required.

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

    What should be noted if all fillets and rounds are uniform in size?

    <p>All fillets and rounds are Rxx.</p> Signup and view all the answers

    The location of holes is denoted by the letter _____ in dimensioning.

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

    Match the following dimensioning techniques with their descriptions:

    <p>Arcs = Dimensioned by giving the radius Angles = Use circular dimension line at the vertex Fillets = Use a local note for the radius Holes = Specify diameter, depth, and location</p> Signup and view all the answers

    Which angle range is correct for a radial leader line?

    <p>30 to 60 degrees (B)</p> Signup and view all the answers

    The dimensioning figure for arcs should always be placed outside the arc.

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

    A _____ dimension line is used when the arc’s center is outside the sheet or interferes with other views.

    <p>foreshortened radial</p> Signup and view all the answers

    What dimensions are required for a cylinder?

    <p>Longitudinal view diameter and length (B)</p> Signup and view all the answers

    The symbol 'Ø' should be placed before diameter figures in a cylinder's dimensioning.

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

    What are the two key dimensions needed for holes?

    <p>Diameter and depth</p> Signup and view all the answers

    For a chamfer, use leader line and note to indicate linear distance and _____ of the chamfer.

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

    Match the following hole types with their characteristics:

    <p>Through hole = Extends completely through the material Blind hole = Does not go all the way through the material Counterbore = Flat bottomed hole larger than the drill size Countersink = Conical hole for a flat head screw</p> Signup and view all the answers

    What is a common mistake when dimensioning holes?

    <p>Dimensioning hidden lines (B)</p> Signup and view all the answers

    Extension lines can cross dimension lines without any restrictions.

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

    What should be avoided when dimensioning features in a drawing?

    <p>Dimensioning hidden lines</p> Signup and view all the answers

    Study Notes

    Chapter 5: Convention Practice in Orthographic Writing

    • Orthographic writing conventions are commonly accepted practices that sometimes disregard strict orthographic projection rules.
    • These conventions improve drawing clarity, facilitate dimensioning, reduce drafting effort, and optimize drawing space usage.

    Topics

    • Definition: Conventions are commonly accepted practices that deviate from strict orthographic projection rules to improve drawing clarity. They disregard some projection rules in creating a more readily understandable representation.
    • Purposes:
      • Improve clarity of the drawing.
      • Facilitate the dimensioning process.
      • Reduce drafting effort.
      • Save or more efficiently use drawing space.
    • Types of Conventions:
      • Alternate position of side view
      • Incomplete view (including incomplete side view, partial view, half view, local view)
      • Aligned view
      • Enlarged view
      • Non-existing intersection line
      • Cylinder intersection (hole in cylinder)

    Alternate Position of Side View

    • Purpose: Conserve drawing space and improve clarity, especially when the object's height is short and depth is long.
    • Conventional Practice: When height is small, and depth is large; placing side view adjacent to the top view.
    • Example: A diagram showing a top view and a side view positioned next to the top view for optimal readability and space-saving.

    Incomplete View

    • Definition: Side view eliminating features not clearly shown in the chosen viewing direction.
    • Examples: Incomplete side view, partial view, half view, local view.

    Definition of Incomplete Side Views

    • Incomplete side views are side views where a characteristic feature is omitted because it cannot be clearly seen from the chosen viewing angle.

    Aligned View

    • Definition (and Practice): Imaginary rotation of object features; appearing in principle view around a symmetry axis. Use aligned views when the object features are symmetrical to greatly simplify and reduce drawing space
    • Examples: Diagrams showcasing how aligned views present symmetrical objects in a different way to simplify the drawing.

    Enlarged View

    • Definition: A sectional view enlarging part of the full view at a larger scale.
    • Conventional Practice: Full-view framed by continuous thin lines. The enlarged view must contain both name and specified scale.
    • Example: A diagram illustrating a full view and a proportionally enlarged section, labeled and dimensioned accordingly.

    Non-Existing Intersection Line

    • Definition: Intersection lines that are not physically present due to the object having fillets or rounds; instead, the missing lines are projected from the actual intersection lines on the surfaces.
    • Conventional Practice: When true projection misleads the object's representation, additional lines are added to show where an intersection would be if the fillets or rounds did not exist.
    • Example: A diagram of an object with a round and fillet; showing how the conventional non-existing intersection line is constructed.

    Intersection Between Fillet and Round

    • Definition: Intersection area between an object's round and fillet features.
    • Practical Application: Methods of showing how these curves intersect and the appropriate line techniques. Runout is also included as part of this topic. This has multiple scenarios.
    • Runout: The portion of the curve that extends beyond the visible fillet or round.
    • Example: Illustrations demonstrating how to represent the runout and the intersection.

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    Related Documents

    Chapter 5 Convention Practice in Orthographic Writing PDF
    Chapter 6 Dimensioning PDF

    Description

    Test your knowledge on the conventions of orthographic writing with this quiz based on Chapter 5. Explore how these conventions enhance drawing clarity, improve dimensioning, and optimize space usage. Dive into different types of conventions and their purposes in technical drawing.

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