STSC Accident Prevention and Emergency Response 4 — Questions and Answers
Question 1: A construction worker is found unresponsive at the base of a scaffold. What is the FIRST action the supervisor should take?
- Begin CPR immediately
- Call 911 and ensure the scene is safe before approaching (Correct answer)
- Move the worker to a shaded area
- Notify the project owner
Correct answer: Call 911 and ensure the scene is safe before approaching
Scene safety must be confirmed before approaching an injured worker to prevent the rescuer from also becoming a victim.
Question 2: Which of the following best describes a 'near miss' in construction safety?
- An incident that caused minor property damage only
- An unplanned event that did not result in injury but had the potential to do so (Correct answer)
- An OSHA recordable injury requiring medical treatment
- A safety violation noted during an inspection
Correct answer: An unplanned event that did not result in injury but had the potential to do so
A near miss is an unplanned event with injury potential that did not result in actual harm, and reporting it helps prevent future accidents.
Question 3: During an emergency evacuation drill on a construction site, workers should report to the designated assembly area primarily to:
- Receive new safety assignments
- Allow supervisors to account for all personnel (Correct answer)
- Wait for OSHA inspectors to arrive
- Sign emergency documentation
Correct answer: Allow supervisors to account for all personnel
The assembly area allows supervisors to conduct a headcount and confirm all workers are accounted for and safe.
Question 4: What type of fire extinguisher is appropriate for electrical equipment fires on a construction site?
- Class A
- Class B
- Class C (Correct answer)
- Class D
Correct answer: Class C
Class C extinguishers are designed for energized electrical equipment fires because they use non-conductive agents.
Question 5: A toolbox talk focused on accident prevention is MOST effective when held:
- Monthly during scheduled safety audits
- At the start of each shift before work begins (Correct answer)
- After an incident has already occurred
- Only when new workers join the crew
Correct answer: At the start of each shift before work begins
Pre-shift toolbox talks ensure workers are reminded of hazards and prevention measures before they begin work each day.
Question 6: Under OSHA's incident reporting requirements, a work-related fatality must be reported to OSHA within:
- 8 hours (Correct answer)
- 24 hours
- 48 hours
- 72 hours
Correct answer: 8 hours
OSHA requires employers to report all work-related fatalities within 8 hours of learning of the incident.
Question 7: Which control method is considered MOST effective in the hierarchy of controls for preventing construction accidents?
- Administrative controls
- Personal protective equipment
- Engineering controls (elimination/substitution) (Correct answer)
- Warning signs and barriers
Correct answer: Engineering controls (elimination/substitution)
Engineering controls — especially elimination or substitution of the hazard — are highest on the hierarchy because they remove or reduce the hazard at its source.
STSC Accident Prevention and Emergency Response 4
A construction worker is found unresponsive at the base of a scaffold.
What is the FIRST action the supervisor should take?