OSHA 30 General Industry Safety Certification Practice Exam Study
Guide Updated 2026 | Verified Questions and Answers with Detailed
Rationales | OSHA Standards and Advanced Regulations, Workplace
Hazard Analysis, Personal Protective Equipment (PPE), Electrical Safety
and Lockout Tagout (LOTO), Machine Guarding, Hazard Communication
(HAZCOM), Industrial Hygiene, Fire Safety and Emergency Action Plans,
Ergonomics, Materials Handling and Storage, Safety Management
Systems, Workers’ Rights and Employer Responsibilities | Complete Exam
Prep Resource for OSHA 30 General Industry Certification Success
Question 1: Which section of the Occupational Safety and Health Act of 1970
establishes the General Duty Clause requiring employers to provide a workplace
free from recognized hazards?
A. Section 3(a)
B. Section 4(b)
C. Section 5(a)(1)
D. Section 6(c)
CORRECT ANSWER: C. Section 5(a)(1)
RATIONALE: The General Duty Clause, found in Section 5(a)(1) of the OSH Act, requires
employers to furnish employment and a place of employment free from recognized
hazards that are causing or likely to cause death or serious physical harm. This clause
serves as a catch-all provision for hazards not specifically addressed by OSHA
standards.
Question 2: Under OSHA's recordkeeping requirements, within how many hours
must an employer report a work-related fatality to OSHA?
A. 4 hours
B. 8 hours
C. 24 hours
D. 48 hours
CORRECT ANSWER: B. 8 hours
RATIONALE: As of January 1, 2015, OSHA requires employers to report any work-related
fatality within 8 hours of the incident. This reporting must be done orally via telephone
or in person to the nearest OSHA area office or through OSHA's toll-free number.
Question 3: What is the minimum height above an adjacent floor or ground level at
which an open-sided floor must be guarded by a standard railing with toeboard?
A. 3 feet
B. 4 feet
C. 5 feet
D. 6 feet
,CORRECT ANSWER: B. 4 feet
RATIONALE: OSHA standard 1910.23(c)(1) requires that any open-sided floor, platform,
or runway 4 feet or more above an adjacent floor or ground level must be guarded by a
standard railing with toeboard on all open sides, except at entrances to ramps,
stairways, or fixed ladders.
Question 4: Which of the following is NOT one of the six key elements of an
effective injury and illness prevention program as recommended by OSHA?
A. Management leadership
B. Employee participation
C. Annual profit analysis
D. Hazard identification and assessment
CORRECT ANSWER: C. Annual profit analysis
RATIONALE: OSHA recommends six key elements for injury and illness prevention
programs: management leadership, employee participation, hazard identification and
assessment, hazard prevention and control, education and training, and program
evaluation and improvement. Annual profit analysis is a financial metric, not a safety
program element.
Question 5: When using a portable non-self-supporting ladder, what is the correct
ratio for positioning the base of the ladder from the wall relative to the ladder's
working length?
A. 1:2 ratio
B. 1:3 ratio
C. 1:4 ratio
D. 1:5 ratio
CORRECT ANSWER: C. 1:4 ratio
RATIONALE: OSHA requires that non-self-supporting ladders be positioned with the
base a distance from the wall equal to one-quarter the working length of the ladder (the
4-to-1 rule). This angle provides optimal stability and reduces the risk of the ladder
slipping or tipping.
Question 6: Which pictogram under the Hazard Communication Standard indicates
a health hazard such as carcinogenicity or respiratory sensitization?
A. Flame over circle
B. Skull and crossbones
C. Silhouette of a person with a star on the chest
D. Exclamation mark
CORRECT ANSWER: C. Silhouette of a person with a star on the chest
,RATIONALE: The health hazard pictogram under GHS/OSHA HazCom shows a
silhouette of a person with a white star on the chest. This pictogram warns of hazards
such as carcinogenicity, mutagenicity, reproductive toxicity, respiratory sensitization,
target organ toxicity, and aspiration hazards.
Question 7: What is the maximum permissible noise exposure limit for an 8-hour
work shift under OSHA standard 1910.95?
A. 80 dBA
B. 85 dBA
C. 90 dBA
D. 95 dBA
CORRECT ANSWER: C. 90 dBA
RATIONALE: OSHA's noise exposure standard (1910.95) sets the permissible exposure
limit (PEL) at 90 dBA as an 8-hour time-weighted average. However, employers must
implement a Hearing Conservation Program when exposures reach 85 dBA TWA.
Question 8: Under the Lockout/Tagout standard (1910.147), who is authorized to
remove a lockout or tagout device that they applied?
A. Any supervisor
B. The employee who applied the device
C. The safety manager
D. The equipment manufacturer
CORRECT ANSWER: B. The employee who applied the device
RATIONALE: OSHA's Lockout/Tagout standard requires that each lockout or tagout
device be removed only by the employee who applied it. If that employee is unavailable,
specific procedures involving verification and authorization must be followed before
another authorized employee may remove the device.
Question 9: Which type of confined space requires a written permit, atmospheric
testing, attendant, and rescue procedures before entry?
A. Non-permit confined space
B. Permit-required confined space
C. Temporary confined space
D. Ventilated confined space
CORRECT ANSWER: B. Permit-required confined space
RATIONALE: A permit-required confined space is defined by OSHA as having one or
more specific hazards: hazardous atmosphere, engulfment hazard, inwardly converging
walls, or other serious safety/health hazards. Entry requires a written permit,
atmospheric testing, an attendant, and documented rescue procedures.
, Question 10: What is the minimum clearance distance that unqualified personnel
must maintain from overhead power lines rated at 50 kV or less?
A. 5 feet
B. 8 feet
C. 10 feet
D. 12 feet
CORRECT ANSWER: C. 10 feet
RATIONALE: OSHA standard 1910.333(c)(3) requires that unqualified employees and
mechanical equipment maintain a minimum clearance of 10 feet from overhead power
lines rated 50 kV or less. For voltages exceeding 50 kV, the clearance must increase by 4
inches for each additional 10 kV.
Question 11: Which personal protective equipment is required when employees
are exposed to flying particles that could cause eye injury?
A. Safety glasses with side shields
B. Face shield only
C. Regular prescription eyeglasses
D. Sunglasses with UV protection
CORRECT ANSWER: A. Safety glasses with side shields
RATIONALE: OSHA standard 1910.133 requires eye and face protection when
employees are exposed to hazards such as flying particles, molten metal, liquid
chemicals, or light radiation. Safety glasses with side shields provide basic protection
against flying particles; additional protection may be required based on the specific
hazard.
Question 12: Under the Hazard Communication Standard, what document must
chemical manufacturers and importers prepare for each hazardous chemical they
produce or import?
A. Material Safety Report
B. Chemical Inventory List
C. Safety Data Sheet
D. Hazard Assessment Form
CORRECT ANSWER: C. Safety Data Sheet
RATIONALE: The Hazard Communication Standard (1910.1200) requires chemical
manufacturers and importers to prepare a Safety Data Sheet (SDS) for each hazardous
chemical. SDSs contain 16 standardized sections with information on chemical
properties, hazards, protective measures, and emergency procedures.
Question 13: What is the minimum width required for an exit access route under
OSHA standards?
Guide Updated 2026 | Verified Questions and Answers with Detailed
Rationales | OSHA Standards and Advanced Regulations, Workplace
Hazard Analysis, Personal Protective Equipment (PPE), Electrical Safety
and Lockout Tagout (LOTO), Machine Guarding, Hazard Communication
(HAZCOM), Industrial Hygiene, Fire Safety and Emergency Action Plans,
Ergonomics, Materials Handling and Storage, Safety Management
Systems, Workers’ Rights and Employer Responsibilities | Complete Exam
Prep Resource for OSHA 30 General Industry Certification Success
Question 1: Which section of the Occupational Safety and Health Act of 1970
establishes the General Duty Clause requiring employers to provide a workplace
free from recognized hazards?
A. Section 3(a)
B. Section 4(b)
C. Section 5(a)(1)
D. Section 6(c)
CORRECT ANSWER: C. Section 5(a)(1)
RATIONALE: The General Duty Clause, found in Section 5(a)(1) of the OSH Act, requires
employers to furnish employment and a place of employment free from recognized
hazards that are causing or likely to cause death or serious physical harm. This clause
serves as a catch-all provision for hazards not specifically addressed by OSHA
standards.
Question 2: Under OSHA's recordkeeping requirements, within how many hours
must an employer report a work-related fatality to OSHA?
A. 4 hours
B. 8 hours
C. 24 hours
D. 48 hours
CORRECT ANSWER: B. 8 hours
RATIONALE: As of January 1, 2015, OSHA requires employers to report any work-related
fatality within 8 hours of the incident. This reporting must be done orally via telephone
or in person to the nearest OSHA area office or through OSHA's toll-free number.
Question 3: What is the minimum height above an adjacent floor or ground level at
which an open-sided floor must be guarded by a standard railing with toeboard?
A. 3 feet
B. 4 feet
C. 5 feet
D. 6 feet
,CORRECT ANSWER: B. 4 feet
RATIONALE: OSHA standard 1910.23(c)(1) requires that any open-sided floor, platform,
or runway 4 feet or more above an adjacent floor or ground level must be guarded by a
standard railing with toeboard on all open sides, except at entrances to ramps,
stairways, or fixed ladders.
Question 4: Which of the following is NOT one of the six key elements of an
effective injury and illness prevention program as recommended by OSHA?
A. Management leadership
B. Employee participation
C. Annual profit analysis
D. Hazard identification and assessment
CORRECT ANSWER: C. Annual profit analysis
RATIONALE: OSHA recommends six key elements for injury and illness prevention
programs: management leadership, employee participation, hazard identification and
assessment, hazard prevention and control, education and training, and program
evaluation and improvement. Annual profit analysis is a financial metric, not a safety
program element.
Question 5: When using a portable non-self-supporting ladder, what is the correct
ratio for positioning the base of the ladder from the wall relative to the ladder's
working length?
A. 1:2 ratio
B. 1:3 ratio
C. 1:4 ratio
D. 1:5 ratio
CORRECT ANSWER: C. 1:4 ratio
RATIONALE: OSHA requires that non-self-supporting ladders be positioned with the
base a distance from the wall equal to one-quarter the working length of the ladder (the
4-to-1 rule). This angle provides optimal stability and reduces the risk of the ladder
slipping or tipping.
Question 6: Which pictogram under the Hazard Communication Standard indicates
a health hazard such as carcinogenicity or respiratory sensitization?
A. Flame over circle
B. Skull and crossbones
C. Silhouette of a person with a star on the chest
D. Exclamation mark
CORRECT ANSWER: C. Silhouette of a person with a star on the chest
,RATIONALE: The health hazard pictogram under GHS/OSHA HazCom shows a
silhouette of a person with a white star on the chest. This pictogram warns of hazards
such as carcinogenicity, mutagenicity, reproductive toxicity, respiratory sensitization,
target organ toxicity, and aspiration hazards.
Question 7: What is the maximum permissible noise exposure limit for an 8-hour
work shift under OSHA standard 1910.95?
A. 80 dBA
B. 85 dBA
C. 90 dBA
D. 95 dBA
CORRECT ANSWER: C. 90 dBA
RATIONALE: OSHA's noise exposure standard (1910.95) sets the permissible exposure
limit (PEL) at 90 dBA as an 8-hour time-weighted average. However, employers must
implement a Hearing Conservation Program when exposures reach 85 dBA TWA.
Question 8: Under the Lockout/Tagout standard (1910.147), who is authorized to
remove a lockout or tagout device that they applied?
A. Any supervisor
B. The employee who applied the device
C. The safety manager
D. The equipment manufacturer
CORRECT ANSWER: B. The employee who applied the device
RATIONALE: OSHA's Lockout/Tagout standard requires that each lockout or tagout
device be removed only by the employee who applied it. If that employee is unavailable,
specific procedures involving verification and authorization must be followed before
another authorized employee may remove the device.
Question 9: Which type of confined space requires a written permit, atmospheric
testing, attendant, and rescue procedures before entry?
A. Non-permit confined space
B. Permit-required confined space
C. Temporary confined space
D. Ventilated confined space
CORRECT ANSWER: B. Permit-required confined space
RATIONALE: A permit-required confined space is defined by OSHA as having one or
more specific hazards: hazardous atmosphere, engulfment hazard, inwardly converging
walls, or other serious safety/health hazards. Entry requires a written permit,
atmospheric testing, an attendant, and documented rescue procedures.
, Question 10: What is the minimum clearance distance that unqualified personnel
must maintain from overhead power lines rated at 50 kV or less?
A. 5 feet
B. 8 feet
C. 10 feet
D. 12 feet
CORRECT ANSWER: C. 10 feet
RATIONALE: OSHA standard 1910.333(c)(3) requires that unqualified employees and
mechanical equipment maintain a minimum clearance of 10 feet from overhead power
lines rated 50 kV or less. For voltages exceeding 50 kV, the clearance must increase by 4
inches for each additional 10 kV.
Question 11: Which personal protective equipment is required when employees
are exposed to flying particles that could cause eye injury?
A. Safety glasses with side shields
B. Face shield only
C. Regular prescription eyeglasses
D. Sunglasses with UV protection
CORRECT ANSWER: A. Safety glasses with side shields
RATIONALE: OSHA standard 1910.133 requires eye and face protection when
employees are exposed to hazards such as flying particles, molten metal, liquid
chemicals, or light radiation. Safety glasses with side shields provide basic protection
against flying particles; additional protection may be required based on the specific
hazard.
Question 12: Under the Hazard Communication Standard, what document must
chemical manufacturers and importers prepare for each hazardous chemical they
produce or import?
A. Material Safety Report
B. Chemical Inventory List
C. Safety Data Sheet
D. Hazard Assessment Form
CORRECT ANSWER: C. Safety Data Sheet
RATIONALE: The Hazard Communication Standard (1910.1200) requires chemical
manufacturers and importers to prepare a Safety Data Sheet (SDS) for each hazardous
chemical. SDSs contain 16 standardized sections with information on chemical
properties, hazards, protective measures, and emergency procedures.
Question 13: What is the minimum width required for an exit access route under
OSHA standards?
