Electrical Hazards and Utility Line Safety Flashcards
7 cards from real CTSP 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 Hazards and Utility Line Safety flashcards as text
Before beginning tree work in proximity to utility lines, a tree care company's most important first step is to:
Answer: Contact the utility company to coordinate the work and establish safe procedures
Coordinating with the utility company before work begins ensures lines can be de-energized, insulated, or that proper approach distances are established before any crew member enters the work zone.
When a tree limb falls onto an energized power line, what is the FIRST action a ground worker should take?
Answer: Call 911 and warn bystanders to stay well back from the area
The immediate priority is life safety — alerting emergency services and keeping all personnel clear prevents additional injuries from step potential and contact hazards.
The 'Limited Approach Boundary' in electrical safety is defined as:
Answer: The distance within which an unqualified person faces a shock hazard and may not enter without an escort
The Limited Approach Boundary marks the point at which an unqualified person is at risk of shock and must not cross without a qualified escort or specific authorization.
For energized lines rated above 50kV, how much additional minimum approach distance must unqualified workers add for every 10kV above 50kV?
Answer: 4 inches (10 cm)
Per OSHA 1910.333, unqualified worker minimum approach distances increase by 4 inches for each additional 10kV (or fraction thereof) above 50kV.
Which personal protective equipment provides primary electrical isolation for qualified line-clearance arborists working near energized conductors?
Answer: Rubber insulating gloves with leather protectors and other rubber insulating equipment
Rubber insulating gloves (with leather protector gloves over them) and other rubber insulating equipment provide the primary barrier between the worker and an energized conductor.
In aerial lift operations, 'two-blocking' refers to:
Answer: The load block or hook contacting the boom tip, which can cause catastrophic rigging failure
Two-blocking occurs when the hook block contacts the boom head or tip sheave, placing extreme stress on the line and potentially causing the hoist rope or load to fail.
ANSI A300 Part 7 (Integrated Vegetation Management) is most relevant to electrical utility tree work because it:
Answer: Establishes best management practices for utility right-of-way vegetation management
ANSI A300 Part 7 provides industry best management practices (BMPs) for integrated vegetation management programs, which are central to utility right-of-way and line-clearance work.