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Quizzes > Business & Finance > Business & Industry

Lockout/Tagout Safety Quiz: Can You Master Hazardous Energy Control?

Ready for the OSHA Electrical Lockout/Tagout Quiz? Dive in!

Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art lock tag on machinery with quiz prompt on energy control Lockout Tagout OSHA safety on golden yellow background

This Lockout Tagout quiz helps you practice OSHA energy control steps and spot gaps before work or an audit. Review applying locks and tags, verifying zero energy, and which devices isolate energy; then try another LOTO quiz or the OSHA electrical version .

What is the primary purpose of a lockout/tagout program?
To monitor worker performance
To increase production speed
To prevent unauthorized startup of machinery during maintenance
To document training records
A lockout/tagout program is designed to prevent machines from being energized while maintenance or servicing is performed. This control of hazardous energy reduces the risk of injury or death from unexpected equipment startup. Proper use of locks and tags ensures only authorized employees can re-energize equipment. For more details see .
Which OSHA standard covers lockout/tagout procedures?
29 CFR 1910.147
29 CFR 1910.120
29 CFR 1910.212
29 CFR 1926.20
OSHA's control of hazardous energy (lockout/tagout) requirements are located in standard 29 CFR 1910.147. This standard outlines employer responsibilities for energy control procedures and training. Familiarity with 1910.147 is essential for compliance and safety. See the full standard at .
Who is authorized to remove a lockout device?
Any supervisor in the area
The employee who applied the device
A coworker with similar training
The maintenance manager
Only the employee who applied a lockout device may remove it, ensuring accountability and preventing unauthorized re-energization. This rule protects workers by maintaining a clear chain of responsibility. Supervisors or others must follow established procedures if removal is needed in emergencies. For more on this requirement, refer to .
Lockout/tagout procedures must be applied when servicing equipment that can release which type of energy?
Thermal energy only
Sound energy
Potential energy only
Hazardous energy such as electrical, mechanical, hydraulic
The lockout/tagout standard covers all forms of hazardous energy including electrical, mechanical, hydraulic, pneumatic, chemical and thermal energies. It ensures that any energy source capable of causing injury is isolated before service. Sound energy is not considered a hazardous source for LOTO. More information is available at .
What is the first step in the basic lockout/tagout sequence?
Disable energy sources
Place the lock
Notify affected employees
Test the equipment
Notifying affected employees is the first step so that everyone who uses or services the machine is aware of the upcoming shutdown. This step promotes safety and communication before energy isolation. After notification, the authorized employee follows the shutdown, isolation, and lockout stages. See procedures at .
Tagout serves primarily as which of the following?
An energy isolating device
A warning device
A training document
A physical restraint
A tagout device is a prominent warning label that alerts employees that the energy isolating device and equipment being controlled may not be operated. It does not physically prevent energy flow, unlike a lockout device. Tags alone require supplementary protection to ensure safety. More on tagout at .
What color are standard lockout tags to indicate a locked piece of equipment?
Blue
Green
Red
Yellow
Red is the standard color for lockout tags to signal danger and the presence of hazardous energy controls. This color coding is widely recognized and mandated for consistency. Green or other colors are not used for lockout warnings. For tagging guidelines, see .
Which of the following best describes an energy-isolating device?
A control system software
Personal protective equipment
A mechanical device that physically prevents the transmission of energy
A warning tag attached to an energy source
An energy-isolating device is any mechanical device that physically prevents energy transmission, such as a manually operated switch or valve. Tags serve as warnings but do not isolate energy. PPE protects against hazards but does not control energy sources. Read more at .
How often must authorized employees inspect their lockout/tagout procedures?
Every month
Only before each lockout
Once every five years
At least annually
OSHA requires a periodic inspection of the energy control procedures at least annually to ensure effectiveness. The inspection must be performed by an authorized employee other than those using the procedures. This review identifies and corrects deviations or inadequacies. See the annual inspection requirement at .
A group lockout procedure requires a written plan when:
The work will take less than 15 minutes
The machine has a single energy source
Multiple workers must lock out the same machine
Only one worker performs maintenance
When more than one person works on the same equipment, a group lockout procedure with a written plan is required to coordinate activities and ensure each person's safety. This procedure identifies who applies and removes locks, and how communication is maintained. Single-worker scenarios do not require a group plan. More details at .
What is the required action if an employee who applied a lockout device is absent during shift change?
Remove the device and continue work
Call the equipment manufacturer
Wait until the employee returns
Follow an established transfer of lockout/tagout responsibility procedure
During shift changes, the outgoing and incoming authorized employees must follow a documented transfer-of-responsibility procedure. This ensures no unauthorized removal of lockout devices and maintains energy control integrity. Simply removing locks or waiting are not compliant. See shift change protocols at .
Before beginning work, the authorized employee must verify isolation by:
Attempting to start the equipment
Observing other workers
Filling out a permit
Reading the equipment manual
Verification of isolation requires a test or a try-out, such as attempting to start the equipment to confirm no hidden energy remains. This step ensures complete de-energization before work begins. Documentation alone is insufficient. Learn more at .
Stored energy must be released, restrained, or otherwise rendered safe under LOTO. Which is an example of restraining stored energy?
Blocking hydraulic actuators with mechanical stops
Wearing insulating gloves
Covering electrical panels
Posting warning signs
Restraint of stored energy uses mechanical means like blocks or supports to prevent movement of actuators or springs. Simply covering panels or wearing PPE does not restrain energy. Warning signs only alert workers but do not neutralize hazards. See stored energy controls at .
What document outlines the site's specific lockout/tagout procedures for complex machinery?
The fire safety plan
The equipment maintenance schedule
A written energy control procedure
The accident investigation report
Complex machinery requires a detailed, written energy control procedure specifying shutdown, isolation, application of devices, and verification steps. This ensures consistency and safety for all authorized employees. Maintenance schedules or reports do not fulfill this requirement. View sample procedures at .
According to OSHA, what must be done immediately after applying lockout devices?
Record the time of application
Inform the equipment manufacturer
Begin maintenance
Verify isolation by attempting startup
After applying lockout devices, the authorized employee must verify that the energy source is isolated by attempting to operate the equipment controls. This ensures that no residual or unexpected energy remains. Recording time or notifying manufacturers is not part of immediate verification. See verification requirements at .
If a lock cannot be applied directly to the energy isolating device, what should be used to secure it?
Hasps that allow multiple padlocks
Welding clamps
Electrical tape
Zip ties
Lockout hasps are designed to secure an energy isolating device when it lacks locking capability and allow multiple padlocks for group lockout. Tape, ties, or clamps do not meet OSHA's physical isolation requirements. Proper hasps ensure each authorized employee retains control. More at .
Which of the following energy types is not regulated by the OSHA lockout/tagout standard?
Sound energy
Electrical energy
Hydraulic energy
Mechanical energy
OSHA's lockout/tagout standard covers hazardous energies such as electrical, mechanical, hydraulic, pneumatic, chemical, and thermal energies. Sound energy is not considered a hazardous energy type requiring lockout/tagout. Therefore, it is not regulated under 1910.147. For the full scope, see .
During group lockout, who is responsible for the main lock?
All authorized employees equally
Equipment operator
Safety representative
Group lockout coordinator
A group lockout coordinator maintains the main isolating device and ensures all participants attach individual locks to a group hasp. This role centralizes accountability and communication. Other team members attach their own locks but the coordinator holds the primary device key. Learn about group procedures at .
What is the minimum number of authorized employees required to perform an annual LOTO inspection?
Three authorized employees
At least one authorized employee
No specific requirement
One supervisor and one employee
OSHA mandates that at least one authorized employee, other than those using the procedures, conduct the annual inspection. This independent review identifies and corrects any deviations. There is no requirement for multiple inspectors or supervisors. More at .
Which action is required when servicing equipment that has multiple energy sources?
Isolate and lock out each energy source individually
Rely on machine guards
Use warning tags on secondary sources
Disable the primary energy source only
Every energy source, whether electrical, hydraulic, pneumatic or stored energy, must be isolated and locked out before servicing. Disabling only the primary source or tagging alone does not guarantee safety. Guards are not a substitute for energy isolation. See multi-source requirements at .
What should be included in an energy control procedure for each piece of equipment?
Supplier contact information
Employee shift schedules
Specific steps for shutting down, isolating, and verifying energy isolation
Cost analysis of downtime
A compliant energy control procedure must detail the step-by-step process for shutdown, isolation, placement of locks and tags, dissipation of residual energy, and verification of isolation. Financial or logistical details are not required. Proper documentation ensures worker safety. Read more at .
Under OSHA 1910.147, how must an employer handle the removal of a lockout device if the employee who applied it is unavailable and cannot be contacted?
Establish a documented procedure with management authorization and verification of employee clearance
Wait indefinitely for the employee
Transfer the lock to another employee
Simply remove the lock and proceed
If the lockowner is not available, the employer must follow a written procedure that includes management authorization, verification that the employee is safe, and documentation of the entire process. This ensures responsibility and safety. Removing a lock without procedure or waiting indefinitely is not permitted. Guidance is in .
Which OSHA requirement ensures that contractors follow the host employer's LOTO procedures when working on site?
Allowing contractors to use their own procedures
Informing contractors of the host's energy control procedures before work begins
Having contractors sign a general safety agreement
Providing contractors with personal locks only
OSHA requires host employers to inform contractors of the site-specific energy control procedures and ensure they understand and follow them. This guarantees consistency and safety across all workforces on site. Simply giving locks or general agreements does not satisfy the rule. See contractor requirements at .
How often must retraining be conducted for authorized employees if their job assignments change or a new energy control procedure is implemented?
Retraining is not required
Within five years
Before the employee uses the new procedure or performs the new assignment
Only at the next annual inspection
Retraining is required whenever there is a change in job assignments, equipment, or energy control procedures to ensure the employee is proficient in the new practices. This training must occur before work begins under the revised procedures. Waiting for the annual inspection or omitting training is non-compliant. OSHA's training requirements are detailed at .
When should verification of effective lockout/tagout be performed for complex machinery?
Only during periodic inspections
Before notifying employees
After maintenance is complete
After lockout devices are applied, before servicing begins
Verification must occur immediately after lockout devices are applied and before any work starts to confirm that the equipment cannot be operated. This step is critical for complex machinery with multiple energy sources. Post-maintenance checks or periodic inspections do not replace initial verification. Detailed procedures are found at .
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Study Outcomes

  1. Compare responses with lockout tagout safety quiz answers -

    Evaluate your performance and reinforce understanding of key energy control concepts by reviewing the correct answers.

  2. Demonstrate knowledge of OSHA electrical lockout/tagout quiz requirements -

    Identify regulatory standards and procedural steps mandated by OSHA for safe energy isolation in electrical systems.

  3. Differentiate which of the following is not an energy isolating device -

    Recognize true isolating methods versus non-isolating controls in varied equipment scenarios to prevent unexpected startup.

  4. Apply proper use of lockout devices and tagout devices -

    Learn selection and implementation procedures to securely de-energize machinery prior to servicing or maintenance.

  5. Determine when servicing and maintenance are safest to perform -

    Assess optimal timing and conditions that minimize risk during equipment upkeep and repairs.

  6. Analyze real-world lockout/tagout scenarios -

    Challenge yourself with practical examples to improve hazard recognition, decision-making, and energy control program effectiveness.

Cheat Sheet

  1. OSHA 1910.147 Lockout/Tagout Basics -

    Familiarize yourself with the lockout tagout safety quiz answers by reviewing OSHA 1910.147, which sets federal requirements for controlling hazardous energy during machinery servicing. Knowing the definitions of lockout and tagout devices ensures you can answer osha electrical lockout/tagout quiz questions confidently. Use official OSHA and NIOSH publications to reinforce your understanding.

  2. Energy-Isolating vs. Control Devices -

    Understand which of the following is not an energy isolating device by distinguishing fixed mechanical devices - like gate valves and disconnect switches - from push buttons or selector switches, which are merely control devices. Remember the memory aid "Gate, Valve, Switch" for true energy isolators and avoid confusion in your answers. Refer to ANSI/ASSE and NFPA guidelines for detailed classifications.

  3. Seven Steps for Effective Lockout/Tagout -

    Master the seven-step procedure: prepare, notify, shut down, isolate, lock, tag, and verify stored energy is zero. Use the mnemonic "PN SIL TV" (Prepare, Notify, Shut, Isolate, Lock, Tag, Verify) to retain the sequence for your lockout tagout safety quiz answers. Academic sources like university safety engineering courses often break down each step with practical examples.

  4. Servicing and Maintenance Timing -

    Servicing and maintenance are safest to perform when all hazardous energy sources are isolated and verified at zero stored energy - commonly called "zero-energy state." This principle is core to lockout devices and tagout devices must follow guidelines to keep workers safe. Studies from OSHA case data and IEEE 1584 emphasize the importance of energy verification before any maintenance begins.

  5. Lockout and Tagout Device Requirements -

    Lockout devices and tagout devices must be durable, standardized in color and print, and scalable to fit various energy sources; locks typically use red for immediate recognition. A handy mnemonic is "DSPC": Durable, Standardized, Printed, Color-coded. The Practice Safety Council and OSHA-compliant online courses provide detailed specs for these devices.

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