Reading Schematics and Symbols

Lesson 1 - Introduction to Schematics and Symbols

Topics:

Using schematics; Electrical, pneumatic, hydraulic, and piping schematics; Looking for flow; Electrical current; Fluid flow

Learning Objectives:

– State the definition of a schematic.
– List some characteristics of schematics.
– Identify a schematic among other kinds of technical drawings and diagrams.
– Explain how flow is indicated on a schematic.

Lesson 2 - Symbols on Schematics

Topics:

Common features in schematics; Creating and using the schematic; Identifying symbols and connections; Reading diagrams

Learning Objectives:

– Identify various types of lines on schematics.
– Identify the following schematics by their symbols:
    -Electrical
    -Fluid
    -Power Piping
– Give the purpose of legends and other tables of symbols.
– Describe a set-by-step approach to troubleshooting when using a schematic.

Lesson 3 - Electrical Symbols

Topics:

Wires and connections; Switches; Power supply; Electrical loads; Coils and transformers; Fuses and circuit breakers; Grounding; Contacts; Resistors; Symbols in a diagram

Learning Objectives:

– State the meaning of symbols and lines on an electrical schematic.
– Explain the difference between a fuse and a circuit breaker.
– Explain how to trace an electrical circuit.

Lesson 4 - Electrical Diagrams

Topics:

Schematic and wiring diagrams; Series and parallel circuits; Reading electrical diagrams and industrial schematics

Learning Objectives:

– Explain the difference in current flow between a series circuit and a parallel circuit.
– Explain the purpose of a wiring diagram.
– Demonstrate how to read an electrical schematic.
– Identify the objects represented by the symbols on an industrial schematic.

Lesson 5 - Piping Symbols

Topics:

Piping systems; Kinds of diagrams; Projections; Joints; Fittings; Symbols

Learning Objectives:

– Explain the function of a valve in a piping system.
– Name the ways of joining pipe.
– Identify the symbols for various kinds of fittings and describe the function of each fitting.

Lesson 6 - Piping Diagrams

Topics:

Piping systems; Valves; Identifying symbols; Reading a piping schematic

Learning Objectives:

– Give the purpose of a valve in a piping system.
– Explain the difference between a check valve and a cock valve.
– Identify the symbols for various types of valves.
– Demonstrate the ability to determine pipe size from a diagram.

Lesson 7 - Hydraulic and Pneumatic Symbols

Topics:

Fluid power; Reservoirs and receivers; Pumps and compressors; Actuators; Valves; Piping and tubing

Learning Objectives:

– Describe a fluid-power system.
– List and give the purpose of the main parts of a hydraulic system.
– List and give the purpose of the main parts of a pneumatic system.
– Identify pneumatic and hydraulic symbols on schematics.

Lesson 8 - Hydraulic and Pneumatic Diagrams

Topics:

Composite symbols; Understanding circuits; Hydraulic and pneumatic circuit diagrams; Local areas

Learning Objectives:

– Describe a composite symbol.
– Explain the difference between a closed and an open hydraulic or pneumatic system.
– Identify the actuator in a hydraulic diagram.
– Explain the purpose of local areas on a hydraulic or pneumatic diagram.

Lesson 9 - Air Conditioning and Refrigeration Systems

Topics:

Refrigeration, water, air distribution, and control subsystems; Electric, electronic, and pneumatic control schematics

Learning Objectives:

– Describe the subsystems of an air conditioning system.
– Identify the symbols for air conditioning and refrigeration components.
– Explain the operation of an air conditioning and refrigeration control system.

Lesson 10 - Welding and Joining Symbols

Topics:

Methods of welding; Joints; Welds; Symbols for welds; Assembled welding symbol; Placement of welds

Learning Objectives:

– Explain fusion welding.
– Name the main methods of fusion welding.
– Name the five types of joints and three ways of welding each joint.
– Demonstrate how to read and interpret a complete welding symbol.