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Arborists' Certification Complete Study Guide
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Arborists' Certification Complete Study Guide
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Arborists' Certification Complete Study Guide Before installing a cable in a tree, an arborist must Correct Ans - Determine whether the cable will mitigate the risk of failure.Assess the structural stability of the tree's root collar and root system.
Determine the extent of any decay present and the risk it poses.
Cables are installed in trees to Correct Ans - Support heavy limbs or limit movement of limbs with weak connections
In the US, standards for the installation of cables are published in the Correct Ans - ANSI A 300 part 3 standards for tree support systems
The purpose of the thimble in cable installation is to Correct Ans - Protect the cable from excessive wear and increase the bend radius.
In which of the following situations should through-hardware, rather than lags, be used? Correct Ans - Limbs are larger than 8"-10" in diameter at point of installation.
Decay is present in one or more of the limbs at the point where the hardware must be installed.
It would not be possible to seat the length of the lag's thread.
All of the above
EHS cable is attached to anchoring hardware using Correct Ans - A thimble and dead end grips
A ship auger (wood auger) is used for drilling hardware installation holes because Correct Ans - It works efficiently in green wood and pulls the shavings from the hole.
A come-along can be used to Correct Ans - pull limbs closer together to
ensure the cable installation will be taut.
A device used to temporarily hold a cable, allowing the arborist to pull the cable to the anchor. Correct Ans - cable grip Anchor hardware should be installed Correct Ans - in direct line with the pull of the cable.
Wrapping common-grade cable around a thimble, separating the strands, and taking at least two turns per strand on the standing part of the cable Correct Ans - forms an eye-splice termination.
When multiple cables are installed on a limb, Correct Ans - only one cable should be attached to each anchor.
A potential advantage to dynamic support systems is that they Correct Ans - allow for more limb movement (sway).
Tree support systems that incorporate rope or other non-rigid supports are referred to as Correct Ans - dynamic support systems.
A potential advantage to dynamic support support systems is that they Correct Ans - can provide a shock absorbing effect.
The use of steel rod(s) in limbs, leaders, or trunks to provide support for a junction is called Correct Ans - bracing.
The type of rod that should be used in large trees, soft-wooded trees, or decayed wood is a Correct Ans - machine threaded rod.
Bracing is used to Correct Ans - reinforce weak junctions or to strengthen decayed areas.
Tree-to-ground guys should be attached to the tree at a height Correct Ans
- at or above the tree's midpoint.
Guying of mature trees is often permanent because Correct Ans - the tree may not produce support wood/roots after being guyed.
The installation of a cable between a tree and an external anchor is called Correct Ans - guying. Some differences between 7-strand, common-grade cable and extra -high-
strength (EHS) cable are Correct Ans - 7-strand, common-grade cable is more malleable (bendable); EHS cable is stonger.
The type of washers recommended for use in securing through-hardware is Correct Ans - heavy-duty, round washers.
A handy piece of equipment that can be used to spread open thimbles, tighten lags, and help wrap dead-end grips onto the cable is a Correct Ans - cable aid.
To provide added support to trees that have been braced, Correct Ans - cables are usually installed as well.
Generally, cables should be installed Correct Ans - Two-thirds the distance from the weak branch union to the branch tips.
When more than one cable is installed on a limb, the cables should be spaced Correct Ans - no closer together than the distance equal to the diameter of the limb, or 12 inches, whichever is less.
An advantage to using a threaded rod and an amon-eye nut as a means of anchoring a cable is Correct Ans - any length of rod can be cut to fit the
branch.
If multiple cables are required Correct Ans - strength can be achieved by cabling limbs in triangular combinations.
Eye bolts are installed in trees through pre-drilled holes that are Correct Ans - 1/16 to 1/8 inch larger in diameter than the eye bolt.
Which of the following do trees require in relatively large quantities? Correct Ans - Macronutrients.
In urban soils, the presence of available essential elements and microorganism activity is usually Correct Ans - decreased.
Removing leaf litter and other natural sources of nitrogen can Correct Ans
- disrupt nutrient cycling in the soil. The most limiting factor in fertilizer uptake is Correct Ans - Water availability.
A 60 pound bag of 10-6-4 fertilizer contains how many pounds of actual nitrogen? Correct Ans - 6
A complete fertilizer contains Correct Ans - nitrogen, phosphorus, and potassium.
In the drill-hole fertilizer application method, the holes should extend from near the trunk to near the Correct Ans - drip line.
If there is anything restricting the size of the application area, application Correct Ans - should not be compensated in other areas.
Foliar application is usually employed to correct Correct Ans - micronutrient deficiencies.
Injury to a plant resulting from excess fertilizer salts in the surrounding soil is sometimes referred to as Correct Ans - fertilizer burn.
The higher the fertilizer's salt index Correct Ans - the more likely plant
damage will occur in case of over application.
Soil pH can Correct Ans - Limit the uptake of certain nutrients.
Influence the solubility of elements.
Cause nutrients to become insoluble
A texture analysis determines the Correct Ans - amount of sand, silt, and clay present in the soil.
Leaf samples for a routine foliar analysis should be taken from Correct Ans - all over the tree.
Nutrient management and prescription fertilization should consider Correct Ans - Soil structure.
Soil chemistry.
Soil biology.
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