Reading Prints and Schematics
Block X25


96 hours

  Course Prerequisites:
Basic Industrial Math (Block X21)

  What Students Learn:
This block introduces the trainee to the various types of prints, drawings, and schematics used in an industrial environment. The trainee will learn how to read and interpret the different types of standard symbols and abbreviations found on these drawings. This block will benefit trainees entering any industrial trade. Each study unit contains a progress examination.

  Special Notes:
This updated course replaces Reading prints and Schematics, Block X05. Each study unit contains a progress examination.

Dimensioning (186040)
Tolerancing and Symbols (186041)
Sectional Views and Simplified Drafting (186042)
Introduction to Print Reading (186039)
Building Drawings (186043)
Electrical Drawings and Circuits (186044)
Electronic Drawings (186045)
Hydraulic and Pneumatic Drawings (186046)
Piping: Drawings, Materials, and Parts (186047)
Welding Symbols (186048)
Sheet Metal Basics (186049)
Sketching (186050)





  • Identify the height, width, and length dimensions of a drawing.
  • Interpret dimensions on angles, arcs, fillets, rounds, holes, and chamfers.
  • Interpret the surface finish symbols for roughness, waviness, and lay.


    Tolerancing and Symbols


  • Tell the position method from the bracket method of dual dimensioning.
  • Identify the three general classes of fits.
  • Interpret unilateral and bilateral tolerances.
  • Interpret the various symbols and notations used on drawings.


    Sectional Views and Simplified Drafting


  • Tell one type of section from another.
  • Interpret the various types of sections.
  • Interpret drawings using simplified drafting methods.


    Introduction to Print Reading


  • Identify the various kinds of lines used on drawings.
  • Compare and contrast the various types of drawings.
  • Relate the information given in the title block and bill of material to the drawing.
  • Define different types of scales used on drawings.


    Building Drawings


  • Identify the various kinds of building drawings.
  • Compare elevations, plans, and sections.
  • Match the symbols used on drawings with the various building materials they stand for.
  • Interpret the explanations and abbreviations used on building drawings.
  • Read steel and concrete structural drawings.


    Electrical Drawings and Circuits


  • Identify electrical construction drawings, schematics, and wiring diagrams.
  • Interpret various electrical symbols.
  • Read standard abbreviations used in electrical diagrams.
  • Tell if a diagram is a block diagram, a schematic diagram, or a wiring diagram.
  • Compare closed circuits, open circuits, grounded circuits, and short circuits.


    Electronic Drawings


  • Identify and interpret the various electronics symbols used on drawings.
  • Identify and interpret the various types of drawings used in the electronics field.


    Hydraulic and Pneumatic Drawings


  • Graphic symbols for lines, flows, and reservoirs.
  • Pump and valve symbols.
  • Fluid circuit and air circuit components.
  • Graphical, circuit, cutaway, pictorial, and combined diagrams.


    Piping: Drawings, Materials, and Parts


  • Define the term "piping drawings."
  • Recognize plans, elevations, and sectional views.
  • Identify a view by its placement on a drawing.
  • List what working drawings include.
  • Evaluate whether or not a freehand sketch serves its intended purpose.
  • Interpret the standard symbols and abbreviations and "read" the color coding on piping in industrial and power plants.
  • Interpret dimensions marked on piping drawings.


    Welding Symbols


  • Identify by name the welding processes commonly used in plant maintenance work.
  • Name the best welding processes for a given welding job.
  • Identify by sight, the basic joint and groove designs used in welding.
  • Identify by sight the basic types of welds and describe their uses.
  • Interpret the weld symbols most often found in the drawings used in plant maintenance work.


    Sheet Metal Basics


  • Identify sheet metal of known material and thickness by page and weight.
  • Figure allowances for bends, circumferences, seams, locks, and edges.
  • Know when and where to cut relief radi.
  • Catalog and identify by sight the various seams, locks, and edges.
  • Name and describe the major tools and machines used in sheet metal working.
  • Explain how large fittings can be constructed.
  • List the characteristics of PVC and PVF sheet and laminates.




  • Use the right techniques for sketching straight and curved lines, and circles and arcs.
  • Draw, with practice, multiview sketches of simple objects that accurately show all the details of the objects.
  • Draw dimension sketches of simple machine parts with enough detail that parts can be made.
  • Draw, with practice, realistic sketches of objects that have simple rectangular and circular shapes.


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