CEA Safety Standards & Regulations 3 — Questions and Answers
Question 1: Which OSHA standard regulates the control of hazardous energy (lockout/tagout) for electrical equipment?
- 29 CFR 1910.147 (Correct answer)
- 29 CFR 1910.303
- 29 CFR 1926.50
- 29 CFR 1910.269
Correct answer: 29 CFR 1910.147
29 CFR 1910.147 is OSHA's standard for the Control of Hazardous Energy, commonly known as the Lockout/Tagout standard.
Question 2: What action must be taken FIRST before applying a lockout device to electrical equipment?
- Notify all affected employees
- Apply PPE
- Shut down the equipment using normal stopping procedures (Correct answer)
- Test for absence of voltage
Correct answer: Shut down the equipment using normal stopping procedures
OSHA's LOTO sequence requires shutting down the equipment through normal stopping procedures before isolating the energy source and applying lockout devices.
Question 3: Arc flash boundary distances are determined by which factor?
- The length of the conductor
- The incident energy level that could cause a second-degree burn at a given distance (Correct answer)
- The available fault current only
- The wire insulation rating
Correct answer: The incident energy level that could cause a second-degree burn at a given distance
The arc flash boundary is the distance at which incident energy equals 1.2 cal/cm², the threshold for a curable second-degree burn.
Question 4: Which regulatory body sets the minimum safe approach distances for qualified electrical workers?
- IEEE
- OSHA and NFPA 70E (Correct answer)
- UL
- ANSI
Correct answer: OSHA and NFPA 70E
OSHA's 29 CFR 1910.333 and NFPA 70E Table 130.4 together establish minimum approach distances for shock protection.
Question 5: A 'qualified person' under OSHA 1910.399 is defined as someone who:
- Holds any electrical license
- Has training or experience to avoid electrical hazards when working on energized equipment (Correct answer)
- Has completed a 4-year apprenticeship
- Is certified by UL
Correct answer: Has training or experience to avoid electrical hazards when working on energized equipment
OSHA defines a qualified person as one with training and/or experience that enables them to avoid the electrical hazards of working on or near exposed energized parts.
Question 6: Ground Fault Circuit Interrupters (GFCIs) are required on all 120V, 15A and 20A receptacles in which of the following NEC locations?
- Bedrooms and hallways
- Bathrooms, kitchens, garages, crawl spaces, and outdoor areas (Correct answer)
- Only outdoor areas
- Attics and utility rooms
Correct answer: Bathrooms, kitchens, garages, crawl spaces, and outdoor areas
NEC 210.8 requires GFCI protection in bathrooms, kitchens, garages, crawl spaces, unfinished basements, outdoor areas, and other damp/wet locations.
Question 7: What is the primary purpose of a Safety Data Sheet (SDS) on a job site?
- To list the cost of hazardous materials
- To provide hazard, handling, and emergency response information for chemicals (Correct answer)
- To document equipment maintenance schedules
- To record electrical inspection results
Correct answer: To provide hazard, handling, and emergency response information for chemicals
An SDS provides detailed information about chemical hazards, safe handling, storage, PPE requirements, and emergency response procedures under OSHA's HazCom standard.
CEA Safety Standards & Regulations 3
Which OSHA standard regulates the control of hazardous energy (lockout/tagout) for electrical equipment?