4.0 Focus Four: Electrocution OSHA 30 Practice Quiz
45 exam-style questions covering 8% of the OSHA 30 exam. Instant feedback on every answer, progress tracking, no signup required.
This domain is part of the OSHA 30-Hour Construction practice test. Each question is tagged by exam objective and difficulty so you can drill exactly the areas you need.
Sample Questions
Which condition is a common electrocution hazard on a construction site?
- A. A damaged extension cord with exposed conductors
- B. A cord routed away from traffic and protected from damage
- C. A tool inspected before use and removed when defective
- D. A dry, covered receptacle protected by a GFCI
Exposed conductors can energize workers, tools, or surfaces and create shock or electrocution hazards. This is the correct answer.
On site, which condition is a common electrocution hazard on a construction site?
- A. On site, a damaged extension cord with exposed conductors
- B. On site, a tool inspected before use and removed when defective
- C. On site, a dry, covered receptacle protected by a GFCI
- D. On site, a cord routed away from traffic and protected from damage
Exposed conductors can energize workers, tools, or surfaces and create shock or electrocution hazards. This is the correct answer.
A worker raises a metal ladder near energized overhead power lines. What is the main hazard?
- A. A minor housekeeping concern
- B. Electrocution from contact or close approach to energized lines
- C. A respiratory hazard from ladder material
- D. Noise exposure from nearby traffic
Metal ladders can conduct electricity if they contact or approach energized overhead lines. This is the correct answer.
Which action best addresses electrocution hazard recognition? A worker raises a metal ladder near energized overhead power lines. What is the main hazard?
- A. On site, a respiratory hazard from ladder material
- B. On site, electrocution from contact or close approach to energized lines
- C. On site, noise exposure from nearby traffic
- D. On site, a minor housekeeping concern
Metal ladders can conduct electricity if they contact or approach energized overhead lines. This is the correct answer.
On site, a worker raises a metal ladder near energized overhead power lines. What is the main hazard?
- A. During the shift, noise exposure from nearby traffic
- B. During the shift, electrocution from contact or close approach to energized lines
- C. During the shift, a minor housekeeping concern
- D. During the shift, a respiratory hazard from ladder material
Metal ladders can conduct electricity if they contact or approach energized overhead lines. This is the correct answer.
During electrical hazard planning on a construction site, which task creates an electrical hazard that should be controlled before work starts?
- A. Reviewing drawings in the project trailer
- B. Using a battery-powered radio in a break area
- C. Using power tools in wet conditions with damaged cords
- D. Storing dry lumber away from temporary panels
Wet conditions and damaged cords can increase the likelihood of electrical shock. This is the correct answer.
Which task creates an electrical hazard that should be controlled before work starts?
- A. On site, using a battery-powered radio in a break area
- B. On site, storing dry lumber away from temporary panels
- C. On site, using power tools in wet conditions with damaged cords
- D. On site, reviewing drawings in the project trailer
Wet conditions and damaged cords can increase the likelihood of electrical shock. This is the correct answer.
Which worker is exposed to an electrocution hazard?
- A. A worker using a properly guarded non-defective tool on a dry surface
- B. A worker walking through a marked pedestrian path away from electrical work
- C. A worker using a listed tool according to the manufacturer’s instructions
- D. A worker operating equipment beneath overhead energized power lines without clearance controls
Equipment near overhead power lines can contact or approach energized conductors and energize the machine. This is the correct answer.
Key Terms in This Domain
- Hand protection: Gloves selected for the specific hazard: cut, chemical, electrical, abrasion, or thermal
- Hazard prevention and control: Hierarchy: elimination, substitution, engineering controls, administrative controls, PPE, applied in order
- Job hazard analysis (JHA): Step-by-step task review that identifies hazards and specifies controls before work begins
- Pre-task plan: Daily/shift planning document covering scope, hazards, controls, PPE, and emergency response
- Ground-fault circuit interrupter (GFCI): Device that detects current imbalance and shuts off power to prevent shock; required on construction sites for 120 V receptacles
- Assured equipment grounding conductor program (AEGCP): Documented inspection program permitted as an alternative to GFCI on construction sites
- Qualified person (electrical): Worker trained in construction or operation of electric equipment and the hazards involved
- Energized work permit: Authorization required to work on energized electrical equipment when de-energizing is infeasible
- Hard hat (Class E/G/C): Head protection; Class E rated for high-voltage, Class G for general, Class C provides no electrical protection
- Engage and empower: Involve crew members in finding hazards and solutions; give them authority to act
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Other OSHA 30 Domains
- 1.0 Introduction to OSHA
- 2.0 Managing Safety and Health
- 3.0 Focus Four: Falls
- 5.0 Focus Four: Struck-By
- 6.0 Focus Four: Caught-In or Between
- 7.0 Personal Protective Equipment
- 8.0 Health Hazards in Construction
- 9.0 Stairways and Ladders
- 10.0 Elective Construction Topics
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