CSST EXAM PREP (NOTES FOR THE CALIFORNIA CSST EXAM) QUESTIONS WITH 100% CORRECT SOLUTIONS. 2026/2027 | Page 1 | Passing Score: 75%
CALIFORNIA CSST
CSST EXAM PREP (NOTES FOR THE CALIFORNIA CSST EXAM) QUESTIONS WITH
100% CORRECT SOLUTIONS. 2026/2027
CERTIFIED SITE SAFETY TRAINER • Official Exam 2026/2027
100 75% CERTIFIED
QUESTIONS PASSING SCORE RECERTIFICATION
TABLE OF CONTENTS
Section 1 California OSHA Regulations & Standards Q1-22
Section 2 Construction Safety Hazards & Controls Q23-43
Section 3 Safety Program Management & Training Q44-63
Section 4 Fall Protection, Scaffolding & Excavation Q64-82
Section 5 Electrical Safety, Fire Prevention & HazCom Q83-100
Instructions: Select the single best answer for each question. This exam is designed for California CSST (Certified Site
Safety Trainer) exam preparation. Passing score: 75% (75 questions correct).
CSST EXAM PREP (NOTES FOR THE CALIFORNIA CSST EXAM) QUESTIONS WITH 100% CORRECT SOLUTIONS. 2026/2027 — 2026/2027 | Passing Score: 75% | Page 1 of 50
, SECTION 1 | California OSHA Regulations & Standards | Q1-22 | CSST EXAM PREP (NOTES FOR THE CALIFORNIA CSST EXAM) QUESTIONS WITH
100% CORRECT SOLUTIONS. 2026/2027 2026/2027
Q1 Question 1 of 100
A construction site safety trainer in Los Angeles is conducting an orientation for new workers and needs to
explain the jurisdictional authority over workplace safety. A worker asks whether federal OSHA or Cal/OSHA
has authority over their private construction project. The trainer should explain that in California, workplace
safety enforcement for most private employers falls under which authority?
A. Cal/OSHA, because California operates an OSHA-approved State Plan that gives it primary jurisdiction over
occupational safety and health in the state, superseding federal OSHA enforcement for most private sector employers
B. Federal OSHA, because federal law always preempts state law in workplace safety matters
C. Both agencies have equal and concurrent jurisdiction over every workplace inspection
D. The local fire marshal, because construction safety in California is governed exclusively by local fire codes
Correct Answer: A
Rationale:
California operates an OSHA-approved State Plan, which means Cal/OSHA has primary enforcement authority over occupational
safety and health for most private sector employers in the state. Federal OSHA retains limited jurisdiction over certain federal
facilities and maritime employers. Choice B is incorrect because OSHA-approved State Plans preempt federal OSHA enforcement.
Choice C is incorrect because concurrent jurisdiction does not exist. Choice D is incorrect because fire marshals enforce fire codes,
not occupational safety standards.
Q2 Question 2 of 100
A general contractor on a multi-employer worksite in San Diego receives a Cal/OSHA citation alleging a serious
violation involving a subcontractor's employees who were exposed to an unguarded floor opening. The general
contractor disputes the citation, arguing that the subcontractor was responsible for its own employees' safety.
Under Cal/OSHA's multi-employer worksite doctrine, the general contractor may be cited on which basis?
A. Only if the general contractor's own employees were directly exposed to the same hazard
B. As the controlling employer who had the authority to correct or require correction of the hazard, even if its own
employees were not exposed to the violation
C. Only if the general contractor had a written contract provision explicitly assuming safety responsibility for
subcontractors
D. Never, because each employer is solely responsible for its own employees under California law
Correct Answer: B
Rationale:
Under the multi-employer worksite doctrine, a controlling employer who has authority to correct hazards can be cited even if only
another employer's employees are exposed. This doctrine recognizes that the employer with supervisory authority bears
responsibility for ensuring site-wide safety compliance. Choice B would limit citations to exposing employers only. Choice C
incorrectly suggests that contract language is required. Choice D contradicts the multi-employer doctrine.
CSST EXAM PREP (NOTES FOR THE CALIFORNIA CSST EXAM) QUESTIONS WITH 100% CORRECT SOLUTIONS. 2026/2027 — 2026/2027 | Passing Score: 75% | Page 2 of 50
, Q3 Question 3 of 100
A safety manager at a construction firm in San Francisco is preparing for a Cal/OSHA inspection triggered by a
worker complaint about unsafe scaffolding. The compliance officer arrives and requests access to the site and
safety records. The employer has which obligation under Cal/OSHA regulations regarding the compliance
officer's access?
A. The employer may deny access until a search warrant is obtained, as Fourth Amendment protections apply to all
workplace inspections
B. The employer may require the compliance officer to return at a more convenient time and provide 72 hours advance
notice before any inspection
C. The employer must allow the compliance officer to enter the workplace without delay and provide access to relevant
safety records, as Cal/OSHA has statutory authority to conduct inspections without a warrant during reasonable hours
D. The employer may choose which records to provide and deny access to any documents that might be
self-incriminating
Correct Answer: C
Rationale:
Cal/OSHA compliance officers have statutory authority to enter workplaces without delay during reasonable hours to conduct
inspections. While employers have Fourth Amendment rights, the Supreme Court has held that OSHA inspections under
administrative warrants are permissible, and refusing access can lead to enforcement action. Choice B overstates the employer's
right to refuse. Choice C is incorrect because Cal/OSHA does not provide advance notice of inspections. Choice D is incorrect
because relevant safety records must be provided.
Q4 Question 4 of 100
A construction company in Sacramento receives a Cal/OSHA citation classifying a violation as 'serious.' The
safety director needs to understand the implications of this classification. Under California Labor Code Section
6432, a serious violation is defined as one involving which condition?
A. Any violation that results in an actual injury to an employee, regardless of severity
B. A violation that the employer intentionally committed with full knowledge of the danger
C. Any violation discovered during a complaint-initiated inspection rather than a programmed inspection
D. A violation where there is a substantial probability that death or serious physical harm could result from the hazardous
condition, and the employer knew or should have known of the hazard through the exercise of reasonable diligence
Correct Answer: D
Rationale:
Under California Labor Code Section 6432, a serious violation exists when there is a substantial probability of death or serious
physical harm and the employer knew or should have known of the hazard. This dual requirement of both probability of harm and
employer knowledge distinguishes serious violations from general violations. Choice B confuses the classification with actual injury.
Choice C describes a willful violation, not a serious one. Choice D incorrectly ties classification to inspection type.
CSST EXAM PREP (NOTES FOR THE CALIFORNIA CSST EXAM) QUESTIONS WITH 100% CORRECT SOLUTIONS. 2026/2027 — 2026/2027 | Passing Score: 75% | Page 3 of 50
, Q5 Question 5 of 100
A safety trainer is explaining Cal/OSHA recordkeeping requirements to a group of construction supervisors. A
supervisor asks which injury must be recorded on the Cal/OSHA 300 log. The trainer should explain that
recordable injuries include which category?
A. Any work-related injury or illness that results in death, days away from work, restricted work activity, job transfer,
medical treatment beyond first aid, loss of consciousness, or diagnosis of a significant condition by a healthcare
professional
B. Only injuries that result in at least one full day of hospitalization
C. Only injuries that the worker reports within 24 hours of the incident
D. Any injury that occurs on the employer's premises regardless of whether it is work-related
Correct Answer: A
Rationale:
Cal/OSHA recordkeeping criteria align with federal requirements and include death, days away from work, restricted duty, medical
treatment beyond first aid, loss of consciousness, and significant diagnosis. First aid cases are explicitly excluded from recording
requirements. Choice B is too narrow; many recordable injuries do not require hospitalization. Choice C is incorrect because
reporting timing does not determine recordability. Choice D includes non-work-related injuries that are not recordable.
Q6 Question 6 of 100
A subcontractor on a California construction project discovers that a Cal/OSHA compliance officer is conducting
an inspection following a near-fatal fall. The subcontractor's superintendent asks whether workers have the right
to speak privately with the compliance officer. Under Cal/OSHA regulations, employees have which right during
an inspection?
A. Employees may only speak with the compliance officer in the presence of their supervisor to ensure accurate
information is provided
B. Employees have the right to speak with the compliance officer privately, to file complaints without retaliation, to
request an inspection, and to be informed of their rights under the California Labor Code
C. Employees have no right to communicate with compliance officers during an active inspection
D. Employees may only submit written statements through their employer's legal department
Correct Answer: B
Rationale:
California Labor Code and Cal/OSHA regulations provide employees with the right to speak privately with compliance officers, file
complaints without retaliation, and request inspections. These rights are fundamental to the enforcement framework. Choice B
would chill worker communication with inspectors. Choice C directly contradicts employee rights under the law. Choice D creates an
impermissible barrier between workers and enforcement officials.
CSST EXAM PREP (NOTES FOR THE CALIFORNIA CSST EXAM) QUESTIONS WITH 100% CORRECT SOLUTIONS. 2026/2027 — 2026/2027 | Passing Score: 75% | Page 4 of 50
CALIFORNIA CSST
CSST EXAM PREP (NOTES FOR THE CALIFORNIA CSST EXAM) QUESTIONS WITH
100% CORRECT SOLUTIONS. 2026/2027
CERTIFIED SITE SAFETY TRAINER • Official Exam 2026/2027
100 75% CERTIFIED
QUESTIONS PASSING SCORE RECERTIFICATION
TABLE OF CONTENTS
Section 1 California OSHA Regulations & Standards Q1-22
Section 2 Construction Safety Hazards & Controls Q23-43
Section 3 Safety Program Management & Training Q44-63
Section 4 Fall Protection, Scaffolding & Excavation Q64-82
Section 5 Electrical Safety, Fire Prevention & HazCom Q83-100
Instructions: Select the single best answer for each question. This exam is designed for California CSST (Certified Site
Safety Trainer) exam preparation. Passing score: 75% (75 questions correct).
CSST EXAM PREP (NOTES FOR THE CALIFORNIA CSST EXAM) QUESTIONS WITH 100% CORRECT SOLUTIONS. 2026/2027 — 2026/2027 | Passing Score: 75% | Page 1 of 50
, SECTION 1 | California OSHA Regulations & Standards | Q1-22 | CSST EXAM PREP (NOTES FOR THE CALIFORNIA CSST EXAM) QUESTIONS WITH
100% CORRECT SOLUTIONS. 2026/2027 2026/2027
Q1 Question 1 of 100
A construction site safety trainer in Los Angeles is conducting an orientation for new workers and needs to
explain the jurisdictional authority over workplace safety. A worker asks whether federal OSHA or Cal/OSHA
has authority over their private construction project. The trainer should explain that in California, workplace
safety enforcement for most private employers falls under which authority?
A. Cal/OSHA, because California operates an OSHA-approved State Plan that gives it primary jurisdiction over
occupational safety and health in the state, superseding federal OSHA enforcement for most private sector employers
B. Federal OSHA, because federal law always preempts state law in workplace safety matters
C. Both agencies have equal and concurrent jurisdiction over every workplace inspection
D. The local fire marshal, because construction safety in California is governed exclusively by local fire codes
Correct Answer: A
Rationale:
California operates an OSHA-approved State Plan, which means Cal/OSHA has primary enforcement authority over occupational
safety and health for most private sector employers in the state. Federal OSHA retains limited jurisdiction over certain federal
facilities and maritime employers. Choice B is incorrect because OSHA-approved State Plans preempt federal OSHA enforcement.
Choice C is incorrect because concurrent jurisdiction does not exist. Choice D is incorrect because fire marshals enforce fire codes,
not occupational safety standards.
Q2 Question 2 of 100
A general contractor on a multi-employer worksite in San Diego receives a Cal/OSHA citation alleging a serious
violation involving a subcontractor's employees who were exposed to an unguarded floor opening. The general
contractor disputes the citation, arguing that the subcontractor was responsible for its own employees' safety.
Under Cal/OSHA's multi-employer worksite doctrine, the general contractor may be cited on which basis?
A. Only if the general contractor's own employees were directly exposed to the same hazard
B. As the controlling employer who had the authority to correct or require correction of the hazard, even if its own
employees were not exposed to the violation
C. Only if the general contractor had a written contract provision explicitly assuming safety responsibility for
subcontractors
D. Never, because each employer is solely responsible for its own employees under California law
Correct Answer: B
Rationale:
Under the multi-employer worksite doctrine, a controlling employer who has authority to correct hazards can be cited even if only
another employer's employees are exposed. This doctrine recognizes that the employer with supervisory authority bears
responsibility for ensuring site-wide safety compliance. Choice B would limit citations to exposing employers only. Choice C
incorrectly suggests that contract language is required. Choice D contradicts the multi-employer doctrine.
CSST EXAM PREP (NOTES FOR THE CALIFORNIA CSST EXAM) QUESTIONS WITH 100% CORRECT SOLUTIONS. 2026/2027 — 2026/2027 | Passing Score: 75% | Page 2 of 50
, Q3 Question 3 of 100
A safety manager at a construction firm in San Francisco is preparing for a Cal/OSHA inspection triggered by a
worker complaint about unsafe scaffolding. The compliance officer arrives and requests access to the site and
safety records. The employer has which obligation under Cal/OSHA regulations regarding the compliance
officer's access?
A. The employer may deny access until a search warrant is obtained, as Fourth Amendment protections apply to all
workplace inspections
B. The employer may require the compliance officer to return at a more convenient time and provide 72 hours advance
notice before any inspection
C. The employer must allow the compliance officer to enter the workplace without delay and provide access to relevant
safety records, as Cal/OSHA has statutory authority to conduct inspections without a warrant during reasonable hours
D. The employer may choose which records to provide and deny access to any documents that might be
self-incriminating
Correct Answer: C
Rationale:
Cal/OSHA compliance officers have statutory authority to enter workplaces without delay during reasonable hours to conduct
inspections. While employers have Fourth Amendment rights, the Supreme Court has held that OSHA inspections under
administrative warrants are permissible, and refusing access can lead to enforcement action. Choice B overstates the employer's
right to refuse. Choice C is incorrect because Cal/OSHA does not provide advance notice of inspections. Choice D is incorrect
because relevant safety records must be provided.
Q4 Question 4 of 100
A construction company in Sacramento receives a Cal/OSHA citation classifying a violation as 'serious.' The
safety director needs to understand the implications of this classification. Under California Labor Code Section
6432, a serious violation is defined as one involving which condition?
A. Any violation that results in an actual injury to an employee, regardless of severity
B. A violation that the employer intentionally committed with full knowledge of the danger
C. Any violation discovered during a complaint-initiated inspection rather than a programmed inspection
D. A violation where there is a substantial probability that death or serious physical harm could result from the hazardous
condition, and the employer knew or should have known of the hazard through the exercise of reasonable diligence
Correct Answer: D
Rationale:
Under California Labor Code Section 6432, a serious violation exists when there is a substantial probability of death or serious
physical harm and the employer knew or should have known of the hazard. This dual requirement of both probability of harm and
employer knowledge distinguishes serious violations from general violations. Choice B confuses the classification with actual injury.
Choice C describes a willful violation, not a serious one. Choice D incorrectly ties classification to inspection type.
CSST EXAM PREP (NOTES FOR THE CALIFORNIA CSST EXAM) QUESTIONS WITH 100% CORRECT SOLUTIONS. 2026/2027 — 2026/2027 | Passing Score: 75% | Page 3 of 50
, Q5 Question 5 of 100
A safety trainer is explaining Cal/OSHA recordkeeping requirements to a group of construction supervisors. A
supervisor asks which injury must be recorded on the Cal/OSHA 300 log. The trainer should explain that
recordable injuries include which category?
A. Any work-related injury or illness that results in death, days away from work, restricted work activity, job transfer,
medical treatment beyond first aid, loss of consciousness, or diagnosis of a significant condition by a healthcare
professional
B. Only injuries that result in at least one full day of hospitalization
C. Only injuries that the worker reports within 24 hours of the incident
D. Any injury that occurs on the employer's premises regardless of whether it is work-related
Correct Answer: A
Rationale:
Cal/OSHA recordkeeping criteria align with federal requirements and include death, days away from work, restricted duty, medical
treatment beyond first aid, loss of consciousness, and significant diagnosis. First aid cases are explicitly excluded from recording
requirements. Choice B is too narrow; many recordable injuries do not require hospitalization. Choice C is incorrect because
reporting timing does not determine recordability. Choice D includes non-work-related injuries that are not recordable.
Q6 Question 6 of 100
A subcontractor on a California construction project discovers that a Cal/OSHA compliance officer is conducting
an inspection following a near-fatal fall. The subcontractor's superintendent asks whether workers have the right
to speak privately with the compliance officer. Under Cal/OSHA regulations, employees have which right during
an inspection?
A. Employees may only speak with the compliance officer in the presence of their supervisor to ensure accurate
information is provided
B. Employees have the right to speak with the compliance officer privately, to file complaints without retaliation, to
request an inspection, and to be informed of their rights under the California Labor Code
C. Employees have no right to communicate with compliance officers during an active inspection
D. Employees may only submit written statements through their employer's legal department
Correct Answer: B
Rationale:
California Labor Code and Cal/OSHA regulations provide employees with the right to speak privately with compliance officers, file
complaints without retaliation, and request inspections. These rights are fundamental to the enforcement framework. Choice B
would chill worker communication with inspectors. Choice C directly contradicts employee rights under the law. Choice D creates an
impermissible barrier between workers and enforcement officials.
CSST EXAM PREP (NOTES FOR THE CALIFORNIA CSST EXAM) QUESTIONS WITH 100% CORRECT SOLUTIONS. 2026/2027 — 2026/2027 | Passing Score: 75% | Page 4 of 50
