GRAPHICS

• What is the purpose of a thick, dark continuous line in an orthographic drawing?

  It shows visible edges (Outline).
• What does a thin, lightly drawn continuous line represent in an orthographic drawing?

  It is used for projection (Construction Lines).
• What does a thin broken line indicate in an orthographic drawing?

  It shows hidden edges (Hidden Detail).
• What does a thin chain line (long dash, dot, long dash) represent in an orthographic drawing?

  It shows a Centre Line.
• What does a thin double dash chain line indicate in an orthographic drawing?

  It indicates a Fold Line on a development.
• What does a thin chain line with thick edges represent in an orthographic drawing?

  It shows where an object is sectioned (Cutting Plane).
• What is the Third Angle Projection Symbol used for in orthographic drawings?

  It explains the layout of the drawing.
• What does the Third Angle Projection Symbol indicate about the drawing layout?

  It shows that the drawing is laid out using an Elevation, End Elevation, and Plan.
• What does the symbol indicating Diameter mean when seen on working drawings?

  It denotes the diameter of a circle.
• What does A/F indicate in technical drawings?

  Across Flats.
• What does A/C indicate in technical drawings?

  Across Corners.
• What does BSI stand for in the context of production drawings?

  British Standards Institution.
• What are the benefits of using BSI in production drawings?

  • Drawings are quicker and easier to draw.
  • Drawings are easier to understand.
  • Drawings can impart lots of information efficiently.
  • Universally understood without the need for language.
• What is the role of the British Standards Institution (BSI)?


  It determines British Standards for products, materials, systems, and services.
• Where is a title block located on production drawings?

  In the bottom right-hand corner of the page.
• What information is typically found in a title block?

  • Name
  • Date
  • Title
  • Projection Symbol
  • Original Scale
  • Drawing Number
  • Dimensional Tolerances
• What does the scale determine when producing production drawings?

  It determines the size of a drawing in relation to the object being drawn and the size of the paper.
• What factors determine the scale used in a drawing?

  • The size of the object.
  • The size of the paper.
• What does working to a scale ensure in your drawings?

  It ensures good proportion and accuracy.
• What would the scale be for a full-sized drawing?

  $1 : 1$
• What would the scale be when drawing to half the original size?


  $1 : 2$
• What would the scale be when drawing to a quarter of the original size?


  $1 : 4$
• What would the scale be when drawing to a third of the original size?

  $1 : 3$
• When a scale indicates larger than the original size, which number in the ratio increases?

  The number on the left-hand side of the ratio increases.
• When a scale indicates smaller than the original size, which number in the ratio increases?

  The number on the right-hand side of the ratio increases.
• What are the rules for using leader lines when dimensioning?

  • Leave a small gap to avoid confusion with the outline.
  • Extend beyond dimension lines to avoid confusion.
• What are the rules for using dimension lines when dimensioning?

  • Place dimension lines outside the outline.
  • Arrowheads should be small and slim.
• What are the rules to adhere to when dimensioning a production drawing?

  • Each dimension should be shown only once.
  • Dimensions should be readable from the bottom or right-hand side.
  • Always measure in millimeters unless instructed otherwise.
• Why do we add a third angle projection symbol to production drawings?

  It informs the reader that the drawing has been carried out in this projection.
• What type of dimensioning is shown when circles are dimensioned?

  Dimensioning Circles.
• What type of dimensioning is shown when radii are dimensioned?

  Dimensioning Radii.
• What type of dimensioning is shown when angles are dimensioned?

  Angular Dimensioning.
• What does the building symbol for a socket show?


  It indicates the location of a socket.
• What does the building symbol for a switch show?


  It indicates the location of a switch.
• What does the building symbol for a lamp show?


  It indicates the location of a lamp.
• What does the building symbol for a bath show?


  It indicates the location of a bath.
• What does the building symbol for a shower show?


  It indicates the location of a shower.
• What does the building symbol for a tray show?


  It indicates the location of a tray.
• What does the building symbol for a radiator show?


  It indicates the location of a radiator.
• What does the building symbol for a sink show?


  It indicates the location of a sink.