Welding and Cutting for Maintenance Training

841-01 Safe Welding and Cutting Practices

When the lesson is complete, the user will be able to identify common welding hazards and describe how to use personal protective equipment (PPE), ventilation, and safety procedures to mitigate these hazards.

  • List some common welding hazards
  • Identify and describe proper PPE used in welding
  • Discuss the use of ventilation to avoid welding fumes
  • Describe safety practices employed under hot work conditions
  • Describe safety practices employed under confined space entry conditions
  • Identify safety considerations related to cutting operations
  • Recall safety precautions required in oxyacetylene welding operations
  • Identify safety precautions required in arc welding operations
  • Discuss safe storage and handling of compressed gas cylinders
  • Describe precautions taken to avoid electric shock when welding

841-02 Weldability of Metals

When you complete this lesson, you will be able to identify classifications of various metals and explain factors influencing their weldability.

  • Describe the principles behind a metal’s weldability
  • Discuss commonly used classifications of metals
  • Identify factors and features that influence the weldability of each of the following:
    • Steel
    • Stainless steel
    • Cast iron
    • Aluminum
  • List some adjustments you can make when lack of weldability is a problem
  • Describe steel quenching and tempering processes

841-03 Shielded Metal Arc Welding (SMAW)

When you complete this lesson, you will be able to describe shielded metal arc welding (SMAW) and identify equipment, procedures, and methods used in successful SMAW operations.

  • Describe the operating principles behind shielded metal arc welding (SMAW)
  • List equipment commonly used in SMAW
  • Explain how to strike and sustain a welding arc
  • Explain how to control weld crater formation and overcome arc blow
  • Describe various welding electrodes and their uses
  • Discuss American Welding Society (AWS) symbol representation for electrodes
  • Identify various welding positions commonly used in SMAW

841-04 Gas Metal Arc Welding (GMAW)

When you complete this lesson, you will be able to describe gas metal arc welding (GMAW) methods. In addition, you will be able to discuss the design and function of components used in the GMAW process.

  • Explain the principles of operation behind gas metal arc welding (GMAW)
  • Describe the design and function of each of the following components:
    • GMAW wire feeders
    • GMAW electrode wires
    • GMAW guns
  • List the shielding gases that can be used during GMAW
  • Explain how to start an arc when performing GMAW
  • Describe the four main methods of metal transfer associated with GMAW

841-05 Tungsten Inert Gas (TIG) Welding

When you complete this lesson, you will be able to describe tungsten inert gas (TIG) welding methods. In addition, you will be able to discuss the design and function of components used in the process.

  • Describe the principles of operation behind tungsten inert gas (TIG) welding
  • Describe the design and function of each of the following components:
    • TIG welding torch
    • TIG electrodes
  • Explain the purpose of the use of shielding gas
  • Describe the use of TIG welding filler materials
  • Explain how to start a TIG welding arc
  • Discuss TIG welding positions
  • Explain the process of hot wire welding
  • Explain the process of pulsed TIG welding

841-06 Oxyacetylene Welding (OAW)

When you complete this lesson, you will be able to describe oxyacetylene welding (OAW) techniques. In addition, you will be able to discuss the design and function of components and apparatus used in the OAW process.

  • Describe the principles behind oxyacetylene welding (OAW) operations
  • Identify and describe commonly used OAW equipment
  • Outline the procedure to light an oxyacetylene torch
  • Explain how to adjust the flame on an oxyacetylene welding torch
  • Describe the characteristics of an oxyacetylene flame
  • Discuss oxyacetylene flame control
  • Outline the procedure to shut off an oxyacetylene torch
  • Describe OAW techniques