STSC Hazard Identification and Control 5 — Questions and Answers
Question 1: Which condition would trigger an 'Imminent Danger' notice from an OSHA compliance officer?
- A missing OSHA poster in the break room
- Workers lacking completed safety training records
- A condition where there is reasonable certainty that death or serious physical harm could occur immediately (Correct answer)
- An employer who has not submitted an OSHA 300 log
Correct answer: A condition where there is reasonable certainty that death or serious physical harm could occur immediately
OSHA defines imminent danger as a hazard presenting a reasonable certainty of death or serious physical harm before normal enforcement proceedings can correct it.
Question 2: When inspecting scaffolding for hazards, which defect would MOST immediately require the scaffold to be taken out of service?
- Missing manufacturer's label on a component
- Slightly misaligned cross-braces
- A cracked or bent main frame member (Correct answer)
- Mud on the base plates
Correct answer: A cracked or bent main frame member
A cracked or bent main frame member compromises the structural integrity of the scaffold and poses an immediate collapse hazard requiring immediate removal from service.
Question 3: What is the primary purpose of color-coding in construction hazard identification?
- To comply with OSHA's aesthetic requirements for jobsites
- To provide quick visual recognition of specific hazards and safety information (Correct answer)
- To help workers identify company-owned equipment
- To meet building code requirements for finished construction
Correct answer: To provide quick visual recognition of specific hazards and safety information
Color-coding (e.g., red for danger, yellow for caution, orange for warning) provides immediate visual cues about hazard levels and required precautions.
Question 4: A supervisor observes a worker using a ladder that extends only 1 foot above a roof access point. What hazard has been identified?
- No hazard — any extension above the roof edge is acceptable
- The ladder extends too far and creates a tripping hazard
- The ladder does not extend the required 3 feet above the landing surface (Correct answer)
- The ladder should be horizontal for roof access
Correct answer: The ladder does not extend the required 3 feet above the landing surface
OSHA requires ladders used for roof or elevated area access to extend at least 3 feet (36 inches) above the landing surface to provide a safe handhold.
Question 5: Which technique is MOST effective for identifying hazards that workers may have normalized or no longer notice?
- Having workers self-report only their own hazard observations
- Conducting formal inspections using only the project superintendent
- Using a checklist developed by a fresh set of eyes such as a safety officer or peer from another site (Correct answer)
- Reviewing last year's incident reports and assuming the same hazards are present
Correct answer: Using a checklist developed by a fresh set of eyes such as a safety officer or peer from another site
Normalization of deviance causes workers to overlook familiar hazards; an outside or fresh observer using a systematic checklist is more likely to identify hazards that have been accepted over time.
Question 6: What is the significance of conducting a pre-task safety plan at the start of each workday?
- It replaces the need for a formal Job Hazard Analysis
- It satisfies OSHA's mandatory daily safety meeting requirement
- It allows the crew to identify site-specific hazards and controls before work begins (Correct answer)
- It documents that all PPE has been distributed to workers
Correct answer: It allows the crew to identify site-specific hazards and controls before work begins
A pre-task safety plan engages the crew in identifying unique hazards for that day's specific tasks and conditions before work begins, enabling proactive hazard control.
Question 7: Under OSHA's hierarchy of controls, which measure should a supervisor implement BEFORE resorting to PPE?
- Posting warning signs near the hazard area
- Requiring workers to sign a hazard acknowledgment form
- Installing a physical barrier or guard to isolate workers from the hazard (Correct answer)
- Increasing the frequency of safety inspections
Correct answer: Installing a physical barrier or guard to isolate workers from the hazard
Engineering controls such as physical barriers or machine guards rank higher than PPE in the hierarchy because they reduce exposure at the source rather than relying on worker behavior.
STSC Hazard Identification and Control 5
Which condition would trigger an 'Imminent Danger' notice from an OSHA compliance officer?