Chapter 5: Convention Practice in Orthographic Writing
56 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What does a partial view represent?

  • The entire object
  • Features in three dimensions
  • Only features that need clarification (correct)
  • Symmetrical positions of the object

    • A half view can be depicted using a continuous line.

    False

    Define a local view in technical drawing.

    A local view shows only the features that need clarification.

    An aligned view is created by __________ the object's features about a symmetry axis.

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

    Match the type of view with its description:

    <p>Partial view = Represents portions of the part needing detail Half view = Illustrates only half of the part Local view = Shows specific features for clarification Aligned view = Drawn by rotating features around symmetry axis</p> Signup and view all the answers

    Which of the following statements about a half view is correct?

    <p>It allows for writing a break line.</p> Signup and view all the answers

    The principal view shows the object from multiple perspectives.

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

    What is advisable for symmetrical positioned features in technical drawings?

    <p>Show them on adjacent views in true size at true radial distance from the symmetry axis.</p> Signup and view all the answers

    What is the main purpose of convention practice in orthographic writing?

    <p>To improve the clarity of a drawing</p> Signup and view all the answers

    Incompleted side views show all features of an object clearly from a selected viewing direction.

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

    What does the term 'aligned view' refer to in convention practice?

    <p>A view arrangement where different views are aligned for better readability.</p> Signup and view all the answers

    The type of convention that eliminates features from side views is called an __________ side view.

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

    Match the following types of convention practices with their purpose:

    <p>Alternate position of side view = To save drawing space and improve clarity Incompleted view = To make selective features clearer Aligned view = To align views for easier comparison Enlarged view = To provide detailed representation of small areas</p> Signup and view all the answers

    Which of the following is NOT a type of convention practice listed in the content?

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

    Using a dash line to represent a hidden edge is an example of applying convention practice.

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

    What is the function of using an enlarged view in orthographic writing?

    <p>To provide a detailed representation of a specific area of the object.</p> Signup and view all the answers

    What is the purpose of applying the aligned convention when viewing holes?

    <p>To present holes as unsymmetrically positioned</p> Signup and view all the answers

    An enlarged view must include both a name and the scale used.

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

    What is an enlarged view?

    <p>An enlarged view is a section of a full view that is drawn at a larger scale.</p> Signup and view all the answers

    The non-existing line of intersection is the line of intersecting surfaces that are eliminated by _____ and rounds.

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

    Match the conventions with their corresponding definitions:

    <p>Aligned Convention = Gives impression of unsymmetrical holes Enlarged View = Partly selected view drawn at larger scale Non-existing Line of Intersection = Line eliminated by fillets and rounds Orthographic Projection = Representation of different views of an object</p> Signup and view all the answers

    Which of the following correctly describes the non-existing line of intersection?

    <p>It is eliminated by the presence of fillets and rounds.</p> Signup and view all the answers

    The aligned convention can mislead the representation of an object.

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

    What must be specified for an enlarged view, according to conventional practice?

    <p>Both the name and the scale used.</p> Signup and view all the answers

    What unit is used for length dimensions in the JIS and ISO standards?

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

    The unidirectional method allows dimension figures to be read from both the bottom and the right side of the drawing.

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

    In the aligned method, how are dimension figures oriented?

    <p>They are placed for readability from the bottom and right side of the drawing.</p> Signup and view all the answers

    The symbol for angular dimension is written as ___ with a capital letter O.

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

    Match the dimensioning methods with their descriptions:

    <p>Aligned method = Readable from the bottom and right side Unidirectional method = Readable only from the bottom</p> Signup and view all the answers

    Which statement is true about placing local notes in drawings?

    <p>Place notes outside the view near the feature</p> Signup and view all the answers

    Dimension figures must not be placed in both aligned and unidirectional methods on the same drawing.

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

    What common mistake is indicated in the content regarding dimensioning?

    <p>Placing dimension figures too far from the feature.</p> Signup and view all the answers

    What is the primary purpose of dimensioning in engineering design?

    <p>To specify part's information using figures, symbols, and notes</p> Signup and view all the answers

    Extension lines indicate the extent of a dimension and are drawn with a 4H pencil.

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

    What are the three types of dimensioning systems mentioned?

    <p>Metric system, Decimal-inch system, Fractional-inch system</p> Signup and view all the answers

    The __________ indicates the direction and extent of a dimension.

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

    What dimensions are necessary to define a cylinder?

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

    Match the dimensioning components to their definitions:

    <p>Extension lines = Indicate the location on the object's features to be dimensioned Dimension lines = Indicate the direction and extent of a dimension Leader lines = Detail features with a local note Dimension figures = Represent numerical values of dimensions</p> Signup and view all the answers

    Leaders and local notes should be used to specify the diameter and depth of holes.

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

    What symbol is used before diameter measurements in a longitudinal view of a cylinder?

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

    What should be the minimum spacing between dimension lines and views?

    <p>2 times the letter height</p> Signup and view all the answers

    For a chamfer with an angle of 45 degrees, use the note 'S ______.'

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

    Dimension figures can only be placed within the extension lines.

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

    A dimensioning note specifying material type would be considered __________ information.

    <p>non-graphic</p> Signup and view all the answers

    Match the types of holes with their characteristics:

    <p>Through thickness hole = Hole extends completely through the material Blind hole = Hole does not go all the way through Small size holes = Specified using leader line and local note Large size holes = Use extension dimensions for indication</p> Signup and view all the answers

    Which of the following is a recommended practice in dimensioning?

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

    It is acceptable for extension lines of internal features to leave a gap at the intersection point with visible lines.

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

    What common mistake should be avoided when indicating diameter measurements?

    <p>Drawing the same dimension multiple times</p> Signup and view all the answers

    What should be included when dimensioning an arc?

    <p>The radius followed by 'R'</p> Signup and view all the answers

    The leader line for dimensioning an arc should be horizontal.

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

    What does the 'S' denote in the context of dimensions?

    <p>Size dimension</p> Signup and view all the answers

    To indicate that all fillets and rounds are uniform in size, the note to be added is 'All fillets and rounds are R____.'

    <p>6.5</p> Signup and view all the answers

    Match the following dimension types with their descriptions:

    <p>Circular dimension = Used for angles Radius dimension = Indicates the radius of an arc Size dimension = Defines width, depth, and thickness Location dimension = Specifies the location of holes</p> Signup and view all the answers

    What is the recommended method for dimensioning angles?

    <p>Employing a circular dimension line centered at the angle vertex</p> Signup and view all the answers

    Dimensions for arcs should be placed outside the arc, when space allows.

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

    What is the angle range for inclined leader lines when dimensioning an arc?

    <p>30 to 60 degrees</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 projection rules. These conventions help make drawings more readable and efficient to create.

    Topics

    • Definition:
      • Conventions are commonly accepted practices that disregard certain strict rules of orthographic projection.
      • These practices aim to create more readable multiview representations of an object.
    • Purposes:
      • Improve drawing clarity.
      • Facilitate dimensioning.
      • Reduce drafting efforts.
      • Save or efficiently use drawing space.
    • Types of Conventions:
      • Alternate position of side view: Used to save space when the object's height is small compared to its depth. The side view is placed next to the top view. This practice is useful to save drawing space, and improve the clarity of a drawing.
      • Incomplete views: Eliminate features not clearly visible from a specific viewing direction.
        • Incomplete side view A type of incomplete view focusing on incomplete side views.
        • Partial view: A view that represents portions of a part needing clarification. The additional view provides clarity of needed features.
        • Half view: A partial view showing only half of the part. This way only needed parts are shown, reducing the drawing effort.
        • Local view: A view showing only features requiring clarification. This view is helpful in focusing on the part of interest.
      • Enlarged view: A partially selected view from a full view, drawn at a larger scale. The enlarged portion is framed and named clearly, and it also specifies the scale used.
      • Non-existing intersection line: Used when fillets or rounds eliminate the intersection of surfaces. The line of the intersection is still shown as if the fillets or rounds were not present to prevent misinterpretations. This ensures accurate representation when fillets and rounds are present.
      • Cylinder Intersection: A topic concerning conventions when a hole is present in a cylinder.
        • Large hole: A true, orthographic projection is necessary to show the hole.
        • Small hole: A convention to quickly represent the hole shape is used, simplifying the drawing.
      • Intersection between fillet and round: Explains the intersection points of rounded shapes, and provides examples of flat and rounded corners; and the runout.
      • Runout: The rounded part of the fillet and the rounded part.

    Examples

    • Example of convention practice: Using a dashed line to represent a hidden edge.
    • Examples of other conventions: Alternate position of views, incomplete views (including partial, half, and local views), aligned views, enlarged views, non-existing intersection lines, and intersections between fillets and rounds, and cylinder intersection (large and small holes).

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

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

    Description

    Explore the essential conventions of orthographic writing that enhance clarity and efficiency in drawings. This quiz covers various types of practices, their purposes, and how they contribute to improved representation of objects in multiview. Test your understanding of these critical drawing conventions!

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser