OSHA Lockout Tagout (LOTO) Exam Prep
2026 | Practice Questions, Verified Answers
& Detailed Rationales for Hazardous Energy
Control Safety Certification
OSHA LOCKOUT TAGOUT (LOTO) EXAM PREP 2026 Practice Questions | Verified
Answers | Detailed EXPERT RATIONALE━━━━━━━━━━━━━━━━━━━
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
• This document contains 200 exam-style multiple choice questions with verified
correct answers and clear EXPERT RATIONALE — designed to fully prepare you for
OSHA Lockout/Tagout (29 CFR 1910.147) certification; read every EXPERT
RATIONALE even when you answer correctly, as understanding the "why" is what
makes the difference on exam day.
• Each question mirrors the structure, language, and difficulty of real LOTO
certification exams, covering every testable topic from basic definitions to group
procedures, contractor rules, periodic inspections, and equipment-specific energy
control.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
═══════════════════════════════════════════ SECTION 1:
DEFINITIONS
Question 1 What does the OSHA standard 29 CFR 1910.147 primarily regulate?
A. Personal protective equipment in the workplace
B. Electrical wiring methods in industrial facilities
C. Control of hazardous energy during servicing and maintenance
D. Fire prevention and emergency evacuation procedures
E. Chemical handling and storage requirements
CORRECT ANSWER: C. Control of hazardous energy during servicing and
maintenance
, EXPERT RATIONALE: 29 CFR 1910.147, known as the Control of Hazardous
Energy standard (Lockout/Tagout), specifically addresses the practices and
procedures necessary to disable machinery or equipment to prevent the
unexpected energization, start-up, or release of stored energy that could harm
workers during servicing and maintenance activities.
Question 2 According to OSHA, what is the definition of "authorized
employee" in the LOTO standard?
A. Any worker on the job site who has received basic safety training
B. A person who locks or tags out machines or equipment to perform servicing or
maintenance
C. A supervisor who approves the use of lockout devices on equipment
D. An employee designated by management to inspect LOTO procedures annually
E. Any employee who is permitted to enter a confined space
CORRECT ANSWER: B. A person who locks or tags out machines or
equipment to perform servicing or maintenance
EXPERT RATIONALE: OSHA defines an "authorized employee" as one who locks
or tags out machines or equipment in order to perform servicing or maintenance
on that machine or equipment. This distinction is critical because authorized
employees are the ones who physically apply and remove LOTO devices.
Question 3 Who is considered an "affected employee" under the LOTO
standard?
A. An employee who performs maintenance on machines
B. An employee whose job requires them to operate or use a machine that is being
locked out
C. An employee who applies lockout devices to hazardous equipment
D. A safety officer who oversees lockout tagout compliance
,E. An employee who works in the same building where LOTO is applied
CORRECT ANSWER: B. An employee whose job requires them to operate or
use a machine that is being locked out
EXPERT RATIONALE: An "affected employee" is one whose job requires
operating or using a machine or equipment on which servicing or maintenance is
being performed under LOTO, or whose job requires working in an area where
such servicing is performed. They do not apply LOTO devices but must understand
the process.
Question 4 What is "hazardous energy" as defined under 29 CFR 1910.147?
A. Energy generated only by electrical sources above 600 volts
B. Any energy source including electrical, mechanical, hydraulic, pneumatic,
chemical, thermal, or gravitational that could harm workers
C. Radiation energy found in nuclear facilities only
D. Energy stored in batteries or capacitors only
E. Thermal energy produced by combustion engines
CORRECT ANSWER: B. Any energy source including electrical, mechanical,
hydraulic, pneumatic, chemical, thermal, or gravitational that could harm
workers
EXPERT RATIONALE: OSHA's definition of hazardous energy is broad and
includes all forms — electrical, mechanical, hydraulic, pneumatic, chemical, thermal,
and gravitational. The standard applies wherever any of these forms exist, not just
in electrical situations, which is a common misconception.
Question 5 What is the definition of "lockout" under the LOTO standard?
A. Placing a tag on energy-isolating devices to warn employees
B. The placement of a lockout device on an energy-isolating device in accordance
with an established procedure
, C. The act of blocking physical access to a machine room
D. A verbal warning issued to affected employees before maintenance
E. Removing the power cord from an electrical machine before servicing
CORRECT ANSWER: B. The placement of a lockout device on an energy-
isolating device in accordance with an established procedure
EXPERT RATIONALE: "Lockout" specifically means placing a lockout device on
an energy-isolating device ensuring the machine cannot be energized until the
lockout device is removed. It must be done according to an established procedure.
Simply unplugging a cord or issuing verbal warnings does not meet the definition.
Question 6 What is "tagout" as defined by OSHA?
A. Placement of a tagout device on an energy-isolating device to indicate the
equipment may not be operated until removed
B. A written notice placed on the main office bulletin board about equipment under
maintenance
C. A color-coded sticker applied to the equipment body warning of electric hazards
D. A verbal alert system used by supervisors on the shop floor
E. Any sign placed near machinery that is out of order
CORRECT ANSWER: A. Placement of a tagout device on an energy-isolating
device to indicate the equipment may not be operated until removed
EXPERT RATIONALE: OSHA defines "tagout" as the placement of a tagout
device on an energy-isolating device, in accordance with an established procedure,
to indicate that the energy-isolating device and the equipment being controlled
may not be operated until the tagout device is removed.
Question 7 What is an "energy-isolating device"?
A. A safety harness used during electrical maintenance
2026 | Practice Questions, Verified Answers
& Detailed Rationales for Hazardous Energy
Control Safety Certification
OSHA LOCKOUT TAGOUT (LOTO) EXAM PREP 2026 Practice Questions | Verified
Answers | Detailed EXPERT RATIONALE━━━━━━━━━━━━━━━━━━━
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
• This document contains 200 exam-style multiple choice questions with verified
correct answers and clear EXPERT RATIONALE — designed to fully prepare you for
OSHA Lockout/Tagout (29 CFR 1910.147) certification; read every EXPERT
RATIONALE even when you answer correctly, as understanding the "why" is what
makes the difference on exam day.
• Each question mirrors the structure, language, and difficulty of real LOTO
certification exams, covering every testable topic from basic definitions to group
procedures, contractor rules, periodic inspections, and equipment-specific energy
control.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
═══════════════════════════════════════════ SECTION 1:
DEFINITIONS
Question 1 What does the OSHA standard 29 CFR 1910.147 primarily regulate?
A. Personal protective equipment in the workplace
B. Electrical wiring methods in industrial facilities
C. Control of hazardous energy during servicing and maintenance
D. Fire prevention and emergency evacuation procedures
E. Chemical handling and storage requirements
CORRECT ANSWER: C. Control of hazardous energy during servicing and
maintenance
, EXPERT RATIONALE: 29 CFR 1910.147, known as the Control of Hazardous
Energy standard (Lockout/Tagout), specifically addresses the practices and
procedures necessary to disable machinery or equipment to prevent the
unexpected energization, start-up, or release of stored energy that could harm
workers during servicing and maintenance activities.
Question 2 According to OSHA, what is the definition of "authorized
employee" in the LOTO standard?
A. Any worker on the job site who has received basic safety training
B. A person who locks or tags out machines or equipment to perform servicing or
maintenance
C. A supervisor who approves the use of lockout devices on equipment
D. An employee designated by management to inspect LOTO procedures annually
E. Any employee who is permitted to enter a confined space
CORRECT ANSWER: B. A person who locks or tags out machines or
equipment to perform servicing or maintenance
EXPERT RATIONALE: OSHA defines an "authorized employee" as one who locks
or tags out machines or equipment in order to perform servicing or maintenance
on that machine or equipment. This distinction is critical because authorized
employees are the ones who physically apply and remove LOTO devices.
Question 3 Who is considered an "affected employee" under the LOTO
standard?
A. An employee who performs maintenance on machines
B. An employee whose job requires them to operate or use a machine that is being
locked out
C. An employee who applies lockout devices to hazardous equipment
D. A safety officer who oversees lockout tagout compliance
,E. An employee who works in the same building where LOTO is applied
CORRECT ANSWER: B. An employee whose job requires them to operate or
use a machine that is being locked out
EXPERT RATIONALE: An "affected employee" is one whose job requires
operating or using a machine or equipment on which servicing or maintenance is
being performed under LOTO, or whose job requires working in an area where
such servicing is performed. They do not apply LOTO devices but must understand
the process.
Question 4 What is "hazardous energy" as defined under 29 CFR 1910.147?
A. Energy generated only by electrical sources above 600 volts
B. Any energy source including electrical, mechanical, hydraulic, pneumatic,
chemical, thermal, or gravitational that could harm workers
C. Radiation energy found in nuclear facilities only
D. Energy stored in batteries or capacitors only
E. Thermal energy produced by combustion engines
CORRECT ANSWER: B. Any energy source including electrical, mechanical,
hydraulic, pneumatic, chemical, thermal, or gravitational that could harm
workers
EXPERT RATIONALE: OSHA's definition of hazardous energy is broad and
includes all forms — electrical, mechanical, hydraulic, pneumatic, chemical, thermal,
and gravitational. The standard applies wherever any of these forms exist, not just
in electrical situations, which is a common misconception.
Question 5 What is the definition of "lockout" under the LOTO standard?
A. Placing a tag on energy-isolating devices to warn employees
B. The placement of a lockout device on an energy-isolating device in accordance
with an established procedure
, C. The act of blocking physical access to a machine room
D. A verbal warning issued to affected employees before maintenance
E. Removing the power cord from an electrical machine before servicing
CORRECT ANSWER: B. The placement of a lockout device on an energy-
isolating device in accordance with an established procedure
EXPERT RATIONALE: "Lockout" specifically means placing a lockout device on
an energy-isolating device ensuring the machine cannot be energized until the
lockout device is removed. It must be done according to an established procedure.
Simply unplugging a cord or issuing verbal warnings does not meet the definition.
Question 6 What is "tagout" as defined by OSHA?
A. Placement of a tagout device on an energy-isolating device to indicate the
equipment may not be operated until removed
B. A written notice placed on the main office bulletin board about equipment under
maintenance
C. A color-coded sticker applied to the equipment body warning of electric hazards
D. A verbal alert system used by supervisors on the shop floor
E. Any sign placed near machinery that is out of order
CORRECT ANSWER: A. Placement of a tagout device on an energy-isolating
device to indicate the equipment may not be operated until removed
EXPERT RATIONALE: OSHA defines "tagout" as the placement of a tagout
device on an energy-isolating device, in accordance with an established procedure,
to indicate that the energy-isolating device and the equipment being controlled
may not be operated until the tagout device is removed.
Question 7 What is an "energy-isolating device"?
A. A safety harness used during electrical maintenance
