Course 621 Controlling Hazardous Energy (Lockout/Tagout)

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Course 621 Certificate
Frame not included.
Modules: 3
Hours: 2
Sectors: All Industries

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Course 621 Controlling Hazardous Energy (Lockout/Tagout)

Key Topics

  • Program Requirements
  • Lockout/Tagout Devices
  • Lockout/Tagout Procedures
  • Types of Energy
  • Lockout Device Criteria
  • Training

Target Audience

  • Employee
  • Supervisor
  • Manager

Frequently Asked Questions (FAQs)


An Introduction Lockout/Tagout - Napo

This course presents OSHA's general requirements for controlling hazardous energy during service or maintenance of machines or equipment as detailed in 29 CFR 1910.147, Control of Hazardous Energy. It is not intended to replace or to supplement OSHA standards regarding the control of hazardous energy.

After completing this course, you should also review the OSHA standards on the control of hazardous energy to gain a complete understanding of the requirements regarding the control of hazardous energy. These standards, as well as other relevant resources, are identified throughout this course. For a more complete treatment of this subject take OSHAcademy course 710 Energy Control Program.

Craft workers, electricians, machine operators, and laborers are among the 3 million workers who service equipment routinely and face the greatest risk of injury. Workers injured on the job from exposure to hazardous energy lose an average of 24 workdays for recuperation.

Lockout/Tagout will most likely be required where you work because, after all, just about every workplace includes hazardous energy sources that could injure or kill workers.

Modules and Learning Objectives

Click on the links below to access the modules. You can also click on the links at the top of the page.

Module 1 - Introduction to Rule Requirements

Learning objectives in this module include:

  • Discuss the purpose and scope of the Energy Control Program.
  • Describe the two states and at least five types of hazardous energy.
  • Give an example of how energy is transformed from one type to another.
  • Discuss the differences among lockout (LO), tagout (TO), and lockout/tagout (LOTO)
  • List the eight exceptions to the requirement to perform lockout/tagout.
  • Describe the various types and criteria for lockout/tagout devices.

Module 2 - Training and Inspections

Learning objectives in this module include:

  • Describe Energy Control Program training and retraining requirements.
  • Contrast training requirements for authorized, affected, and other employees.
  • Describe the additional training requirements when tagout procedures are used.
  • Discuss training documentation and certification requirements for authorized employees.
  • Describe periodic Energy Control Program inspection requirements.
  • Describe the various types of corrective actions that might be required after inspections.

Module 3 - Lockout/Tagout Procedures

Learning objectives in this module include:

  • List the seven basic steps in performing lockout tagout.
  • Discuss the process of identifying energy sources and energy-isolating devices.
  • Describe how to properly de-energize equipment and machinery for lockout/tagout.
  • Identify how to properly secure energy-isolating devices.
  • Discuss the importance of dissipating or restraining potential energy.
  • Contrast traditional lockout/tagout with group lockout/tagout procedures.
  • Discuss how to verify equipment isolation.
  • Discuss the procedures for release from lockout/tagout.
  • Describe the proper sequence for lockout/tagout for testing purposes.
  • Discuss the relationship and procedures when working with contractors.

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Course 621 Final Exam

Exam score sheet

After studying the course material and answering the quiz questions, it is time to take the final exam. We highly recommend answering the module quiz questions to check your understanding of the course material. The final exam questions are typically developed from these quiz questions.

OSHAcademy course final exams are designed to make sure students have gained a sufficient understanding of the content covered within each course. To help demonstrate this understanding, students must achieve a passing score on course final exams. It is OSHAcademy's policy to protect the integrity of our exams: as a result, we do not provide missed questions to students.

This is an open book exam. Students are permitted to use a separate browser window to review course content while taking the exam. If you do not pass a final exam, you will see a "Retake Exam" button next to the course on your student dashboard.

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