Core Competencies - Basic Foundations > Reading Blueprints

Reading Blueprints

Course Number: 711

The Reading Blueprints textbook begins with a thorough explanation of how blueprints are structured and the conventions that are used in making them and reading them. These principles are then applied to detail drawings and assembly drawings of mechanical equipment. The chapters that follow deal with special features of blueprints in applications ranging from sheet metal work through electrical and air conditioning work. The Reading Blueprints textbook concludes with information on how to sketch in the style of a blueprint to convey information simply and completely.

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Recommended Contact Hours – 15

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Table of Contents

Chapter 1: Introduction to Blueprints

Topics: Detail drawings; Notes and dimensions; Assembly and pictorial drawings; Orthographic projections; Auxiliary views; Sections

Learning Objectives:

  • Identify details, markings, and machine parts from an assembly drawing.
  • Identify an object from an orthographic drawing.
  • Identify elements located within the title block of a detail drawing.
  • Explain why more than one orthographic projection is needed to show an object on a blueprint.

Chapter 2: Machine Parts

Topics: Simple machines; Screw threads; Heads; Rivets; Welds; Pins; Keys; Springs; Gears; Bearings; Belts and pulleys

Learning Objectives:

  • Describe what a machine is, and explain what it does.
  • Name the two basic methods of joining machine parts.
  • Name and identify from an exhibit several types of threaded fasteners.
  • Name the two basic methods of permanent joining.
  • Identify gears, bearings, and belt drives on drawings.
  • Identify types of screw threads from a specification.

Chapter 3: Machine Drawings

Topics: Machine tools; Exploded views; Assembly and detail drawings; Drafting techniques

Learning Objectives:

  • Name the main parts of a lathe.
  • State the definition of an exploded view.
  • Identify an assembly drawing.
  • Identify a compound rest swivel on an assembly drawing.
  • Identify a specific part on an assembly drawing.

Chapter 4: Sheet Metal Drawings

Topics: Sheet metal; Ventilation systems; Ductwork; Parallel, miter, and radial development; Extra metal for assembly

Learning Objectives:

  • Describe the difference among coils, strips, and sheet metal.
  • Describe how a ventilation system works.
  • State the purpose of an arrow on a duct symbol.
  • Demonstrate how to lay out a development.
  • Define a radial development of a truncated pyramid.

Chapter 5: Building Drawings

Topics: Buildings and building sites; Symbols and conventions; Plat, site, and floor plans; Working drawings

Learning Objectives:

  • Name building materials, given their standard symbols.
  • Explain how to find useful information on a flow diagram.
  • Explain how to find useful information on an industrial plat.
  • List the contents of a set of building drawings.
  • Describe the purpose of a structural drawing.

Chapter 6: Hydraulic and Pneumatic Drawings

Topics: Fluid systems; Pascal's Law; Multiplying forces; Pistons and cylinders; Fluid system components; Symbols

Learning Objectives:

  • Name the components represented by common symbols on hydraulic and pneumatic drawings.
  • Name the components in a simple hydraulic power system.
  • Name the components in a simple pneumatic power system.
  • State Pascal's Law.
  • Discuss the purposes of the components of hydraulic systems.

Chapter 7: Piping and Plumbing Drawings

Topics: Piping and plumbing materials; Kinds of joints; Drawings; Joining metal pipes

Learning Objectives:

  • State the definition of piping.
  • Explain why joints are sometimes brazed instead of soldered.
  • Explain how to assemble a screwed joint.
  • Identify different types of pipe joints.
  • Identify piping-system components shown in a single-line drawing.
  • Define electrochemical corrosion.

Chapter 8: Electrical Drawings

Topics: Importance of electrical drawings; Electric power; Electrical drawings and wiring; Using electrical drawings

Learning Objectives:

  • Identify different electrical symbols on a drawing.
  • Identify the power distribution panels in your plant.
  • Identify different types of conduit and cable.
  • Select the best electrical drawing to use when looking for a faulty circuit between the basement and the first floor.
  • Explain how electricity at 480 volts is reduced by a transformer to 120/240 volts.
  • Define the terms voltage, current, and power.

Chapter 9: Air Conditioning and Refrigeration Drawings

Topics: Principles of refrigeration; Component drawings; Principles of air conditioning; Air conditioning systems

Learning Objectives:

  • Explain how a refrigeration system works.
  • Describe the types of ac controls.
  • Name three kinds of condensers used in air conditioning systems.
  • Explain the difference between unitary and central air-conditioning equipment.
  • Explain how to find useful information on a duct drawing.

Chapter 10: Sketching

Topics: Using and making sketches; Kinds of sketches; Orthographic, isometric, and perspective sketches

Learning Objectives:

  • Name the four kinds of sketches.
  • Identify an isometric sketch.
  • Describe the appearance of a perspective drawing.
  • Discuss how to sketch straight lines and curved lines.
  • State the definition of a vanishing point.

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