1. A worker fell from a scaffold and broke his leg. Production goals had prevented repair of a
damaged guardrail. What should be considered the root cause?
o A) The worker not paying attention
o B) The damaged guardrail
o C) Production goals overriding safety repairs
o D) The height of the scaffold
Rationale: Root causes are underlying system reasons; prioritizing production over
maintenance allowed the hazard to persist.
2. When an imminent hazard exists and cannot be controlled without endangering
employees, what is the first action required?
o A) Call OSHA immediately
o B) Quickly remove all exposed personnel from the area
o C) Take photographs of the hazard
o D) Write a JHA for the hazard
Rationale: Immediate removal from imminent danger is the priority to prevent
death or serious harm.
3. What is the primary purpose of conducting witness interviews during an incident
investigation?
o A) To assign blame to a specific worker
o B) As soon as possible after the incident
o C) Only after reviewing all documents
o D) To avoid writing a report
Rationale: Early interviews yield more accurate recall of events before details fade
or are influenced.
,4. A personal fall arrest system connector, such as a D-ring, must be capable of supporting at
least how many pounds?
o A) 2,000 lbs
o B) 3,000 lbs
o C) 5,000 lbs
o D) 10,000 lbs
Rationale: OSHA requires connectors to withstand 5,000 lbs per employee to
ensure margin of safety.
5. Which section of the OSH Act contains the whistleblower protection program?
o A) Section 5(a)(1)
o B) Section 11(c)
o C) Section 18(b)
o D) Section 21(d)
Rationale: Section 11(c) prohibits retaliation against employees for reporting
safety violations.
6. You are planning to use a portable ladder near an electrical panel. What type of ladder is
safest?
o A) Aluminum step ladder
o B) Non-conductive fiberglass ladder
o C) Wet wooden ladder
o D) Metal extension ladder
Rationale: Non-conductive materials prevent electrical current from passing
through the user.
7. A scaffold that reaches four times its narrowest base dimension must be what?
o A) Disassembled immediately
o B) Secured and braced away from the structure
o C) Used only for light duty
, o D) Inspected by a fire marshal
*Rationale: Scaffolds become unstable beyond a 4:1 height-to-base ratio without
ties to prevent tipping.*
8. What does JHA stand for in construction safety?
o A) Joint Hazard Assessment
o B) Job Hazard Analysis
o C) Japanese Health Association
o D) Job Handling Application
Rationale: JHA identifies step-by-step hazards of specific tasks to develop controls.
9. According to the notes, which crane type typically has the highest combined capacity for
reach and weight?
o A) Rough terrain crane
o B) Truck-mounted hydraulic crane
o C) Crawler/conventional crane
o D) Tower crane with jib
*Rationale: Crawler cranes offer 360-degree operation and heavy lift capacity due
to tracked stability.*
10. A worker using a table saw suffers an amputation. Which question is most relevant for the
investigator?
o A) What color was the saw?
o B) Was the machine adequately guarded, and if not, why not?
o C) How old was the worker?
o D) What brand of blade was used?
Rationale: Guarding failures are primary causes of amputation injuries from
machinery.
11. In the hierarchy of fall hazard control, what has the highest effectiveness?
o A) Personal fall arrest systems
, o B) Elimination of the hazard
o C) Safety nets
o D) Administrative controls
Rationale: Eliminating the fall hazard removes risk entirely, which is superior to
PPE.
12. A trench protective system that uses a box to protect workers from cave-ins is called
what?
o A) Sloping only
o B) Benching system
o C) Shoring system
o D) Trench box (shield system)
Rationale: A trench box shields workers but does not prevent cave-in; it protects
inside.
13. What is the most common form of crystalline silica found in construction materials?
o A) Cristobalite
o B) Tridymite
o C) Quartz
o D) Silica gel
Rationale: Quartz is the most abundant and common form of crystalline silica in
stone, sand, and concrete.
14. If an employee suffers an electrical shock that causes death, OSHA defines this as what?
o A) Shock trauma
o B) Electrocution
o C) Arc blast injury
o D) Thermal burn
Rationale: Electrocution specifically means death by electric shock, not non-fatal
shock.
damaged guardrail. What should be considered the root cause?
o A) The worker not paying attention
o B) The damaged guardrail
o C) Production goals overriding safety repairs
o D) The height of the scaffold
Rationale: Root causes are underlying system reasons; prioritizing production over
maintenance allowed the hazard to persist.
2. When an imminent hazard exists and cannot be controlled without endangering
employees, what is the first action required?
o A) Call OSHA immediately
o B) Quickly remove all exposed personnel from the area
o C) Take photographs of the hazard
o D) Write a JHA for the hazard
Rationale: Immediate removal from imminent danger is the priority to prevent
death or serious harm.
3. What is the primary purpose of conducting witness interviews during an incident
investigation?
o A) To assign blame to a specific worker
o B) As soon as possible after the incident
o C) Only after reviewing all documents
o D) To avoid writing a report
Rationale: Early interviews yield more accurate recall of events before details fade
or are influenced.
,4. A personal fall arrest system connector, such as a D-ring, must be capable of supporting at
least how many pounds?
o A) 2,000 lbs
o B) 3,000 lbs
o C) 5,000 lbs
o D) 10,000 lbs
Rationale: OSHA requires connectors to withstand 5,000 lbs per employee to
ensure margin of safety.
5. Which section of the OSH Act contains the whistleblower protection program?
o A) Section 5(a)(1)
o B) Section 11(c)
o C) Section 18(b)
o D) Section 21(d)
Rationale: Section 11(c) prohibits retaliation against employees for reporting
safety violations.
6. You are planning to use a portable ladder near an electrical panel. What type of ladder is
safest?
o A) Aluminum step ladder
o B) Non-conductive fiberglass ladder
o C) Wet wooden ladder
o D) Metal extension ladder
Rationale: Non-conductive materials prevent electrical current from passing
through the user.
7. A scaffold that reaches four times its narrowest base dimension must be what?
o A) Disassembled immediately
o B) Secured and braced away from the structure
o C) Used only for light duty
, o D) Inspected by a fire marshal
*Rationale: Scaffolds become unstable beyond a 4:1 height-to-base ratio without
ties to prevent tipping.*
8. What does JHA stand for in construction safety?
o A) Joint Hazard Assessment
o B) Job Hazard Analysis
o C) Japanese Health Association
o D) Job Handling Application
Rationale: JHA identifies step-by-step hazards of specific tasks to develop controls.
9. According to the notes, which crane type typically has the highest combined capacity for
reach and weight?
o A) Rough terrain crane
o B) Truck-mounted hydraulic crane
o C) Crawler/conventional crane
o D) Tower crane with jib
*Rationale: Crawler cranes offer 360-degree operation and heavy lift capacity due
to tracked stability.*
10. A worker using a table saw suffers an amputation. Which question is most relevant for the
investigator?
o A) What color was the saw?
o B) Was the machine adequately guarded, and if not, why not?
o C) How old was the worker?
o D) What brand of blade was used?
Rationale: Guarding failures are primary causes of amputation injuries from
machinery.
11. In the hierarchy of fall hazard control, what has the highest effectiveness?
o A) Personal fall arrest systems
, o B) Elimination of the hazard
o C) Safety nets
o D) Administrative controls
Rationale: Eliminating the fall hazard removes risk entirely, which is superior to
PPE.
12. A trench protective system that uses a box to protect workers from cave-ins is called
what?
o A) Sloping only
o B) Benching system
o C) Shoring system
o D) Trench box (shield system)
Rationale: A trench box shields workers but does not prevent cave-in; it protects
inside.
13. What is the most common form of crystalline silica found in construction materials?
o A) Cristobalite
o B) Tridymite
o C) Quartz
o D) Silica gel
Rationale: Quartz is the most abundant and common form of crystalline silica in
stone, sand, and concrete.
14. If an employee suffers an electrical shock that causes death, OSHA defines this as what?
o A) Shock trauma
o B) Electrocution
o C) Arc blast injury
o D) Thermal burn
Rationale: Electrocution specifically means death by electric shock, not non-fatal
shock.
