ISA Arborist Certification EXAM 2023 STUDY BUNDLE PACK SOLUTION (Verified Answers)

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ISA Certified Arborist Exam2023
Questions and Answers (Verified Answers)

1. Makes the color or the leaves green so photosynthesis can take place
   ANS –
   Chlorophyll
   2.loss of water vapor from leaves ANS Transpiration
   3.protects branches & trunk of tree from injury ANS Bark
   4.Orientation of growth in external cell ANS Excurrent Growth
2. Opposite leaf
   arrangement MAPLE
   ASH
   DOGWOOD
   HORSECHESTNUT ANS M.A.D.HORSE

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6. Measure of acidity or alkaline from 0 to 14
   <7 acidic 7> Alkaline
   7 Neutral ANS pH
   7.rounded or broader tree growth ANS Decurrent Growth
   8.loss of leaves in the fall ANS Deciduous
   9.process of converting food into energy ANS Respiration
   10.pours in leaves that open and close to allow for water transportation ANS
   Stom- ata
   11.transportation for the water and minerals throughout the tree ANS Xylem12.Conducts Carbohydrates ANS Phloem
   13.Process how water enters roots ANS Osmosis
   14.organic components that are decaying matter to help increase water
   hold- ing & nutrients to improve soil structure ANS Organic Matter
7. measure of soils capacity to attract, retain & exchange a positive charge ANS Cation Exchange Capacity (CEC)
   

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ISA Arborist Certification Exam 2023
Questions and Answers (Verified Answers)

1. One way to determine how good the drainage is in a potential planting
   area is to:
   A.Test the soil pH
   B. Use an air excavation device to loosen the soil
   C. Perform a water percolation test
   D. Any of the above ANS : C. Perform a water percolation test
2. The major water-conducting cells in angiosperms are the:
   A.Tracheids
   B. Fibers
   C. Parenchyma cells
   D.Vessels ANS : D. Vessels
3. Carbon sequestration occurs:
   A. During photosynthesis
   B. As emissions from vehicles are reduced
   C. As sunlight combines with air pollution

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D. As wood decays ANS : A. During photosynthesis

4. Armillaria mushrooms are often an indicator of:
   A. Poor soil biology
   B. Stressed trees
   C. Root decay
   D. All of the above ANS : D. All of the above
5. A landscape architect has designed a shaded nature walk behind a
   preschool. Which of the following would not be a good tree quality in
   this space?
   A. Attractive fall coloring
   B. Abundant fruiting
   C. Broad, deciduous canopy
   D. All of the above ANS : B. Abundant fruiting
6. A spring pole refers to:
   A. New growth on a tree or shrub after bud break.
   B. A pole saw or pruner used in spring, designed to minimize damage
   to sloughing bark.
   C. A tree trunk that has had all its branches removed.
   D. A pinned branch or small tree under tension by fallen trees. ANS : D. A
   pinned branch or small tree under tension by fallen trees.
7. The branch collar is formed:

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A. By the annual process by which tissue is layered where the branch
and stem meet
B. Only in thick-barked trees, where bark has built up around a union

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ISA Certified Arborist – Test 2023 Questions and Answers
(Verified Answers)

1. What example of tree stressors can be classified as acute? PEB Pg42

• Lightning strike
• insufficient soil
• poor light exposure
• poor moisture conditions: lightning strike

1. What is most likely NOT a possible cause of deformed leaves? PEB pg 4- spray injury

• air pollution
• anthracnose
• frost: Air pollution

1. What tree symptom is NOT likely to be caused by insect infestation?
   PEB Pg42

• leaf droop
• yellow specks
• off-color foliage
• leaves with a scorched appearance: Leaves with a scorched appearance

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4. What insect listed below is classified as having piercing or sucking
   mouth- parts? PEB Pg43

• leafhoppers
• Beetles
• weevils
• borers: leafhoppers

4. What herbicide type eliminates the whole of the plant over a short periodof time? PEB Pg43

• Pre-emergent
• Contact
• Systemic
• Drench: systemic

4. If a tree is suffering from girdling root, what is most likely NOT an
   advisable action? PEB Pg43

• Remove the largest roots first
• Remove only the smallest roots
• Remove the tree
• None of the above: Remove the largest roots first

4. Which of the following is NOT classified as an insect? PEB Pg43

• Mites
• Beetles
• Moths

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• Caterpillars: Mites

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8. What statement below is FALSE regarding vascular disease? PEB Pg44

• Examples include Dutch elm disease and oak wilt
• it is treatable if found in a reasonable timeframe
• it affects the flow of water and nutrients
• it originates from pathogens entering the plant: it is treatable if found
  in a reasonable timeframe

8. Cellulose and lignin are a defense mechanism against predators by
   what means? PEB Pg44

• they give off an unfavorable flavor
• They can’t be digested
• they have a poor taste
• They are toxic: They can’t be digested
  10.A tree exhibits wounded areas of the lower trunk and some physical
  damage to surface roots. What is most likely the cause of injury? PEB
  Pg44
• Frost
• Poor soil conditions
• Lawnmower or machinery
• disease: lawnmower or machinery
  11.What is not one of the primary functions of the energy produced
  by photosynthesis? PEB Pg44
• maintenance
  

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ISA Arborist Certification Practice Exam 2023
Questions and Answers (Verified Answers)

1. The ideal soil ratio for solids to pore space is:
   (A) 20:80 (B) 35:65 (C) 40:60 (D) 50:50 ANS : D
2. What is the correct scientific name for the oak tree genus?
   (A) Quercus (B) Pyrus (C) Larix (D) Acer ANS : A
3. Which of the following is not one of the five major categories of soil
   hori- zons?
   (A) O (B) E (C) N (D) B ANS : C
4. Loam is least composed of what soil classification?
   (A) Sand(B) Silt(C) Clay(D) Loam is composed of all soils evenly ANS : C
5. What is the difference in magnitude of acidity between a PH level
   reading of 4 vs. a PH reading of 7?
   (A) 1(B) 3(C) 100 (D) 1000 ANS : D
6. What is not a detrimental impact on tree growth from compaction?

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(A) Restricted root growth
(B) Reduction of water availability
(C) Increasing organic material
(D) Restricting air movement ANS : C

7. Field capacity is achieved after the draining of which of the following?
   (A) Gravitational water
   (B) Capillary water
   (C) Micropore water
   (D) Compacted drainage ANS : A
8. What best defines the permanent wilting point soil moisture condition?
   (A) Water is present in macro and micropores
   (B) The condition present immediately after the removal of gravitational wate(C) Water is held by soil but unavailable to plants such that they can’t recove(D) No water present in soil ANS : C
9. What soil below most likely has the lowest infiltration rate?
   (A) Loose sand
   (B) Compacted sand
   (C) Loose clay
   (D) Compacted clay ANS : D
   10.What major soil horizon category is not included in the zone
   designated as topsoil?

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(A) A (B) O (C) E (D) C ANS : D
11.What soil type is most easily compacted?
(A) Sand(B) Clay(C) Silt(D) Bedrock ANS : B

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12.What is not a tree characteristic which helps to prevent the loss of water(A) Increased leaf surface area (B) Deep root systems(C) Leaf hairs(D)
Waxy outer leaf layer ANS : A
13.What irrigation system type provides water slowly to specific areas of
the tree root zone?
(A) Drip irrigation(B) High-pressure injection (C) Basin irrigation
(D) Soaker hose ANS : A
14.Trees help to control stormwater runoff by all of the following
means except:
(A) Trees hold water on bark and leaves
(B) Roots intercept and retain runoff
(C) Fallen leaves create a layer of absorption on the ground
(D) All of the above ANS : D
15.What is not an advantage of the use of mulching?
(A) Improve infiltration
(B) Promote deep root system
(C) Reduce soil evaporation
(D) Limit weed competition ANS : B
16.What is the minimum slope for drainage pipes placed above an
impervious layer?
(A) 1/16″ per ft (B) 1/8″ per ft (C) 1/4″ per ft (D) 1/2″ per ft ANS : C