CHST - Construction Health and Safety Technician Electrical Safety and LOTO Questions and Answers Flashcards

What is the required safe distance that unqualified workers must maintain from overhead power lines operating at 50kV on a construction site under OSHA 1926.416?

Answer: 15 feet

OSHA 1926.416 requires unqualified workers to stay at least 10 feet from lines up to 50kV; for 50kV, the distance increases to 15 feet.

During a periodic inspection of a LOTO program, what must the employer document?

Answer: The date, equipment serviced, employees involved, and inspector's name

OSHA 1910.147(c)(6)(ii) requires annual inspections to be certified with the date, equipment, employee names, and inspector name.

A construction electrician is testing an energized 480V circuit. Which PPE at minimum does NFPA 70E require?

Answer: Rubber insulating gloves rated for the voltage and appropriate eye protection

Rubber insulating gloves rated for 480V (minimum Class 00 for shock protection) and eye protection are the minimum PPE required when working on or near exposed energized parts at this voltage.

What is the purpose of an 'equipment-specific' LOTO procedure as opposed to a general LOTO procedure?

Answer: To provide step-by-step instructions tailored to a specific machine's energy sources and isolation points

Equipment-specific procedures document each energy source location, isolation method, and verification step unique to that machine, reducing human error during LOTO execution.

Which scenario represents a 'minor tool change' exception that may allow work without LOTO under 29 CFR 1910.147(a)(2)(ii)?

Answer: Routine blade changes on a machine with reliable interlocks that allow the worker to control hazardous energy exposure

The minor tool change exception applies only when the alternative procedure provides effective protection equivalent to LOTO through reliable interlocks or other engineered controls.

What action is required when an employee whose lock is on a piece of equipment cannot be located at shift end?

Answer: Management must follow a documented procedure that includes trying to locate the employee and verifying the work area is safe before lock removal

OSHA requires employers to have a documented procedure for removing another person's lock, which must include attempts to contact the employee and confirmation the area is safe.

A construction site experiences an electrical fatality. Under OSHA 29 CFR 1904.39, within what timeframe must the employer report the fatality to OSHA?

Answer: Within 8 hours of learning of the fatality

OSHA 1904.39 requires employers to report any work-related fatality to OSHA within 8 hours of learning that the fatality occurred.