ESC Emergency Response & Incident Management 3 — Questions and Answers
Question 1: What is the purpose of an Incident Command System (ICS) during an electrical emergency at an industrial site?
- To assign fault and legal liability to responsible parties
- To provide a standardized management structure that coordinates emergency responders (Correct answer)
- To document insurance claims for damaged equipment
- To replace the facility's Emergency Action Plan during major events
Correct answer: To provide a standardized management structure that coordinates emergency responders
ICS provides a scalable, standardized command structure that allows multiple agencies and responders to coordinate efficiently during emergencies.
Question 2: After an arc flash event, what is the minimum distance non-rescue personnel should maintain from the scene until the system is confirmed de-energized?
- The flash protection boundary as defined in the arc flash study (Correct answer)
- 5 feet from all energized equipment
- 30 feet from the incident location
- There is no defined minimum — use common sense
Correct answer: The flash protection boundary as defined in the arc flash study
The flash protection boundary from the facility's arc flash hazard analysis defines the safe standoff distance for unprotected personnel.
Question 3: Which type of injury from electrical contact most commonly causes delayed cardiac arrest after the initial shock?
- Thermal burns
- Ventricular fibrillation triggered by the shock current (Correct answer)
- Nerve damage causing respiratory failure
- Bone fractures from muscle tetany
Correct answer: Ventricular fibrillation triggered by the shock current
Ventricular fibrillation (VF) is the leading cause of death from electrical shock and can be triggered at current levels as low as 50–100 mA through the cardiac pathway.
Question 4: A worker receives a low-voltage shock and states they feel fine. What is the appropriate next step?
- Allow them to return to work immediately if they are not visibly injured
- Have them evaluated by medical personnel, as internal injuries may not be immediately apparent (Correct answer)
- Monitor them for 15 minutes, then clear them for work
- Document the event and take no further action unless symptoms develop
Correct answer: Have them evaluated by medical personnel, as internal injuries may not be immediately apparent
Electrical injuries can cause internal burns, cardiac arrhythmias, and neurological damage that are not immediately visible; medical evaluation is always required.
Question 5: What is the role of the 'Safety Officer' in an ICS structure during an electrical emergency response?
- To manage communications with external emergency services
- To monitor scene conditions and ensure responder safety during the operation (Correct answer)
- To conduct the root cause analysis after the incident
- To authorize re-energization of equipment
Correct answer: To monitor scene conditions and ensure responder safety during the operation
The ICS Safety Officer has authority to stop unsafe operations and continuously monitors hazards to protect emergency responders.
Question 6: OSHA requires employers to report a work-related fatality to the nearest OSHA office within:
- 24 hours
- 8 hours (Correct answer)
- 72 hours
- The next business day
Correct answer: 8 hours
OSHA 29 CFR 1904.39 requires employers to report all work-related fatalities to OSHA within 8 hours of the event.
Question 7: What is 'lock-out verification' in the context of post-incident re-energization?
- Confirming that the incident has been logged in OSHA records
- Testing to verify zero energy state before removing lockout devices (Correct answer)
- Checking that all LOTO locks are returned to the lockout station
- Reviewing the LOTO permit with supervisory personnel
Correct answer: Testing to verify zero energy state before removing lockout devices
Before removing LOTO devices, a voltage tester must confirm zero energy state at every point where work occurred to prevent re-energization hazards.
ESC Emergency Response & Incident Management 3
What is the purpose of an Incident Command System (ICS) during an electrical emergency at an industrial site?