Which pruning method is considered the most appropriate practice for clearing trees away from energized overhead conductors while preserving tree health?
Electric Utility Pruning
Question · Easy
A proper natural-target pruning cut on a branch large enough to have a branch collar should be made just outside the:
When removing a large limb near a conductor, the three-cut method is used primarily to prevent:
Trades Exam Prep Podcast
Listen on Spotify
Podcast
A 'V' or center cut (crotch pruning) on a tree directly under a conductor is performed to:
Question · Medium
The amount of live crown that should generally NOT be exceeded when removing foliage from a mature tree in a single pruning operation is about:
Heading cuts (stubbing or topping) are discouraged in utility pruning primarily because they:
Side pruning (lateral clearance) of a tree growing beside a conductor should establish clearance based mainly on:
Which species characteristic makes a tree most problematic when planted under a distribution line?
When a final pruning cut creates a wound, the tree limits the spread of decay through a process called:
Question · Hard
Removing a co-dominant stem with included bark near a conductor is desirable because included-bark unions are:
The pruning standard that defines tree pruning practices used by utility arborists in the United States is:
Crown reduction near a conductor is best accomplished by:
Excessive removal of interior and lower foliage that leaves growth concentrated at branch ends ('lion-tailing') is undesirable because it:
When pruning, the branch bark ridge is used to:
Promoting wound closure and minimizing decay after pruning is best achieved by:
Clearance pruning specifications for a utility are typically driven by the goal of maintaining clearance until the:
An arborist encounters a fast-growing tree under a 12 kV distribution line that re-encroaches every year. The most sustainable long-term solution is to:
Tree growth regulators (TGRs) such as paclobutrazol are used in utility vegetation management primarily to:
Before cutting, the utility arborist should evaluate how a removed limb will move. This consideration is most important near conductors because:
Which tool maintenance practice most directly produces clean pruning cuts that close quickly?
In integrated vegetation management (IVM), the long-term objective on a transmission right-of-way is to establish a:
Integrated Vegetation Management
Integrated vegetation management integrates multiple control methods. Which of the following is NOT one of the recognized IVM control method categories?
On a wide transmission right-of-way managed by the wire-zone/border-zone method, the wire zone directly beneath the conductors should be managed for:
A selective foliar herbicide application in IVM is intended to:
The herbicide application method in which the cut surface of a freshly cut stem is treated to prevent resprouting is called:
Basal bark herbicide treatment is applied to:
Repeated broadcast mowing of brush on a right-of-way without follow-up herbicide tends to:
A key advantage of IVM over repeated cyclical mechanical clearing is that, over time, IVM tends to:
Before any herbicide is applied, the applicator's first responsibility is to:
Herbicide spray drift is best minimized by:
Encouraging native grasses, forbs, and pollinator plants in the right-of-way under IVM provides the added benefit of:
The IVM decision-making process selects a control method by weighing the cost, security of the line, and:
Under NERC reliability standard FAC-003, vegetation management on applicable high-voltage transmission lines is primarily concerned with preventing:
Danger trees (hazard trees) outside the maintained right-of-way that could strike a transmission conductor on failure are addressed in a transmission VM program by:
A worker who is NOT a qualified line-clearance tree trimmer is generally required to keep at least how much distance from overhead power lines rated 50 kV or below?
Electrical Knowledge
The OSHA standard that specifically governs line-clearance tree-trimming operations near energized conductors is:
A 'qualified line-clearance tree trimmer' under OSHA 1910.269 is one who:
Under OSHA's minimum approach distance rule for unqualified persons, the clearance from an overhead line increases above the base distance by:
The ANSI standard that addresses arboricultural safety, including electrical hazards and worker categories around utility conductors, is:
Electricity always seeks to flow to ground by the path of least resistance. For a tree worker, the greatest danger of this principle is:
An arborist should treat every overhead utility conductor as:
Many overhead distribution conductors carry a weatherproof covering. This covering is:
On a typical utility pole, which conductors are generally located in the highest position?
The grounded conductor that typically runs below the primary phase conductors and is at or near earth potential is the:
A storm has dropped a conductor across a tree the crew must clear. The correct first action is to:
If a downed energized conductor is near a worker on the ground, the safest way to move away is to:
Electrical voltage on a distribution primary is commonly in the range of:
Loading more…