Electrical Hazard Identification & Risk Assessment Flashcards
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Read the first 7 Electrical Hazard Identification & Risk Assessment flashcards as text
Which condition creates the greatest risk of electric shock when working near energized equipment?
Answer: Working in wet or damp conditions
Moisture dramatically lowers the body's resistance, greatly increasing the risk and severity of electric shock.
What does the term 'flash protection boundary' refer to in arc flash risk assessment?
Answer: The distance beyond which PPE is not required to protect against arc flash burns
The flash protection boundary is the distance at which a worker could receive a second-degree burn from an arc flash event without appropriate PPE.
A risk matrix is used in electrical safety to:
Answer: Combine the likelihood of an event with its potential severity
A risk matrix evaluates both the probability of an incident occurring and the severity of its outcome to prioritize hazard controls.
Which of the following is an example of an administrative control for electrical hazards?
Answer: Requiring two-person buddy systems for energized work
Administrative controls are procedural or policy-based measures, such as requiring a buddy system, rather than physical modifications.
What is the primary purpose of a Job Hazard Analysis (JHA) before electrical work begins?
Answer: To identify potential hazards and determine safe work procedures
A JHA systematically identifies hazards associated with each task step so that appropriate protective measures can be implemented before work starts.
An 'unqualified person' working near electrical hazards must maintain which distance from exposed energized conductors operating at 50 volts or more?
Answer: The limited approach boundary
NFPA 70E defines the limited approach boundary as the closest distance an unqualified person may approach without special training or supervision.
Which hazard is MOST likely to be overlooked during a visual inspection of overhead electrical lines at a construction site?
Answer: Lines that have sagged closer to the ground than required clearances
Sagging overhead lines may not be immediately obvious but can violate safe clearance distances and pose a severe electrocution risk to equipment operators and workers.