Before installing a cable in a tree, an arborist must - ANSWERDetermine 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...
Arborists' Certification Study Guide|575
Questions |Correct Solutions |Verified!!
Before installing a cable in a tree, an arborist must - ANSWERDetermine 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 - ANSWERSupport heavy limbs or limit movement of
limbs with weak connections
In the US, standards for the installation of cables are published in the - ANSWERANSI
A 300 part 3 standards for tree support systems
The purpose of the thimble in cable installation is to - ANSWERProtect the cable from
excessive wear and increase the bend radius.
In which of the following situations should through-hardware, rather than lags, be used?
- ANSWERLimbs 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 - ANSWERA thimble and dead end
grips
A ship auger (wood auger) is used for drilling hardware installation holes because -
ANSWERIt works efficiently in green wood and pulls the shavings from the hole.
A come-along can be used to - ANSWERpull 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. - ANSWERcable grip
Anchor hardware should be installed - ANSWERin 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 - ANSWERforms an eye-
splice termination.
,When multiple cables are installed on a limb, - ANSWERonly one cable should be
attached to each anchor.
A potential advantage to dynamic support systems is that they - ANSWERallow for
more limb movement (sway).
Tree support systems that incorporate rope or other non-rigid supports are referred to
as - ANSWERdynamic support systems.
A potential advantage to dynamic support support systems is that they - ANSWERcan
provide a shock absorbing effect.
The use of steel rod(s) in limbs, leaders, or trunks to provide support for a junction is
called - ANSWERbracing.
The type of rod that should be used in large trees, soft-wooded trees, or decayed wood
is a - ANSWERmachine threaded rod.
Bracing is used to - ANSWERreinforce weak junctions or to strengthen decayed areas.
Tree-to-ground guys should be attached to the tree at a height - ANSWERat or above
the tree's midpoint.
Guying of mature trees is often permanent because - ANSWERthe tree may not
produce support wood/roots after being guyed.
The installation of a cable between a tree and an external anchor is called -
ANSWERguying.
Some differences between 7-strand, common-grade cable and extra -high-strength
(EHS) cable are - ANSWER7-strand, common-grade cable is more malleable
(bendable); EHS cable is stonger.
The type of washers recommended for use in securing through-hardware is -
ANSWERheavy-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 - ANSWERcable aid.
To provide added support to trees that have been braced, - ANSWERcables are usually
installed as well.
Generally, cables should be installed - ANSWERTwo-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 -
ANSWERno 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 - ANSWERany length of rod can be cut to fit the branch.
If multiple cables are required - ANSWERstrength can be achieved by cabling limbs in
triangular combinations.
Eye bolts are installed in trees through pre-drilled holes that are - ANSWER1/16 to 1/8
inch larger in diameter than the eye bolt.
Which of the following do trees require in relatively large quantities? -
ANSWERMacronutrients.
In urban soils, the presence of available essential elements and microorganism activity
is usually - ANSWERdecreased.
Removing leaf litter and other natural sources of nitrogen can - ANSWERdisrupt nutrient
cycling in the soil.
The most limiting factor in fertilizer uptake is - ANSWERWater availability.
A 60 pound bag of 10-6-4 fertilizer contains how many pounds of actual nitrogen? -
ANSWER6
A complete fertilizer contains - ANSWERnitrogen, phosphorus, and potassium.
In the drill-hole fertilizer application method, the holes should extend from near the trunk
to near the - ANSWERdrip line.
If there is anything restricting the size of the application area, application -
ANSWERshould not be compensated in other areas.
Foliar application is usually employed to correct - ANSWERmicronutrient deficiencies.
Injury to a plant resulting from excess fertilizer salts in the surrounding soil is sometimes
referred to as - ANSWERfertilizer burn.
The higher the fertilizer's salt index - ANSWERthe more likely plant damage will occur in
case of over application.
Soil pH can - ANSWERLimit the uptake of certain nutrients.
Influence the solubility of elements.
Cause nutrients to become insoluble
, A texture analysis determines the - ANSWERamount of sand, silt, and clay present in
the soil.
Leaf samples for a routine foliar analysis should be taken from - ANSWERall over the
tree.
Nutrient management and prescription fertilization should consider - ANSWERSoil
structure.
Soil chemistry.
Soil biology.
Quick-release fertilizers should only be used when - ANSWERthe objectives of
fertilization cannot be met with slow-release fertilizers.
Which of the following do trees require in relatively small quantities? -
ANSWERMicronutrients.
Which of the following is an advantage of the liquid injection method? - ANSWERIt can
provide good distribution and uptake of fertilizer.
Certain nutrients might be plentiful in the soil, but unavailable for plant uptake due to the
soil - ANSWERpH
Which of the following can be considered as a potential long-term benefit provided by
organic mulches? - ANSWERImprovement of soil structure.
Improvement of soil fertility.
Increase of biological activity.
The drill-hole method uses - ANSWERgranular fertilizer.
Fertilizer may not be readily absorbed or utilized until - ANSWERroot growth begins.
Excessive salinity in the root zone may - ANSWERdraw moisture out of the roots.
When taking a soil sample, several small cores should be taken from -
ANSWERrepresentative locations of the area in question.
A soil test may not identify a nutrient deficiency problem in a plant because -
ANSWERthe soil may contain adequate nutrients but something may be inhibiting
uptake by the tree.
Iron and zinc are examples of - ANSWERmicronutrients.
Which of the following is the element most likely to be deficient in trees? -
ANSWERNitrogen.
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