Electrical Safety and LOTO Flashcards
7 cards from real CHST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Electrical Safety and LOTO flashcards as text
Under OSHA 29 CFR 1910.147, which condition allows an employer to use an alternative to traditional lockout when equipment design does not allow for lockout?
Answer: A written tagout program with additional safety measures
When equipment cannot be locked out, OSHA allows tagout if the employer demonstrates equivalent protection through additional safety measures documented in a written program.
A construction worker discovers a frayed extension cord on a jobsite. What is the most appropriate immediate action?
Answer: Remove the cord from service and tag it out of service
Damaged extension cords must be immediately removed from service and tagged to prevent use until repaired or replaced.
What is the minimum approach distance for unqualified workers near overhead power lines energized at 50 kV or less on a construction site?
Answer: 10 feet
OSHA 29 CFR 1926.416 requires unqualified workers to maintain at least 10 feet from overhead power lines energized at 50 kV or less.
During a group lockout procedure, each authorized employee must:
Answer: Apply their own personal lock to the group lockout hasp
In group LOTO, each authorized employee applies their own personal lock to a hasp so no one can restore energy until all workers have removed their locks.
Which class of fire extinguisher is specifically rated for energized electrical equipment fires?
Answer: Class C
Class C extinguishers use non-conductive agents and are rated for fires involving energized electrical equipment.
A CHST is reviewing a LOTO procedure for a conveyor system with multiple energy sources. What must the procedure specifically address for each energy source?
Answer: The type and magnitude of energy, and steps to isolate and control it
OSHA requires LOTO procedures to document the type and magnitude of each energy source and the specific steps to isolate and control each one.
What does the acronym 'GFCI' stand for, and what is its primary function on construction sites?
Answer: Ground Fault Circuit Interrupter; protects workers from electrocution by detecting leakage current
A Ground Fault Circuit Interrupter detects small leakage currents to ground and trips within milliseconds to prevent electrocution.