ARBORIST CERTIFICATION MOCK EXAM
QUESTIONS FORM REAL EXAMS LATEST 2025-2026
UPDATE WITH 150 QUESTIONS & 100% CORRECT
DETAILED ANSWERS GRADED A+ (BRAND NEW!!)
1. What is the primary function of xylem in trees?
A. Food storage
B. Transport of water and minerals B. Transport of water and minerals
C. Photosynthesis
D. Hormone production
Xylem conducts water and dissolved minerals from roots to leaves.
2. Which tissue is responsible for secondary growth in trees?
A. Epidermis
B. Phloem
C. Vascular cambium C. Vascular cambium
D. Cortex
The vascular cambium produces new xylem and phloem cells.
3. The most appropriate pruning cut to remove a branch is made:
A. Flush with the trunk
B. Just outside the branch collar B. Just outside the branch collar
C. Midway on the branch
D. At the branch tip
Cutting outside the branch collar helps natural wound closure.
4. Which tree part anchors it to the soil and absorbs water?
A. Leaves
B. Roots B. Roots
C. Bark
D. Buds
Roots stabilize the tree and take up water and nutrients.
5. What is the main cause of tree failure during storms?
A. Excess fruit load
B. Poor pruning only
C. Structural defects and weak attachments C. Structural defects and weak
attachments
D. High humidity
Defects like codominant stems increase failure risk.
6. Which is a key principle of ANSI A300 pruning standards?
A. Random cutting
B. Topping trees
C. Natural target pruning C. Natural target pruning
D. Removing all branches
ANSI A300 promotes cuts that preserve tree health.
7. What is the function of phloem?
A. Water transport
, B. Sugar transport B. Sugar transport
C. Structural support
D. Mineral storage
Phloem distributes sugars produced in photosynthesis.
8. What is a common symptom of root rot?
A. Bright green leaves
B. Wilting and dieback B. Wilting and dieback
C. Increased flowering
D. Faster growth
Root rot limits water uptake causing decline.
9. Which tool is most appropriate for large branch removal?
A. Hand trowel
B. Pole pruner
C. Chainsaw C. Chainsaw
D. Rake
Chainsaws are used for larger woody material.
10. What is the best practice when climbing a tree?
A. Free climbing
B. Using certified climbing systems B. Using certified climbing systems
C. Climbing without PPE
D. Climbing in wet conditions only
Proper climbing systems improve safety.
11. What is codominance in trees?
A. One trunk dominates
B. Two stems of equal size grow together B. Two stems of equal size grow together
C. Root competition
D. Leaf clustering
Codominant stems are structurally weak.
12. Which organism commonly causes Dutch elm disease?
A. Bacteria
B. Fungus B. Fungus
C. Virus
D. Nematode
Fungal pathogens spread via beetles.
13. What is the main purpose of tree mulching?
A. Increase heat
B. Improve soil moisture retention B. Improve soil moisture retention
C. Kill roots
D. Prevent photosynthesis
Mulch conserves moisture and reduces weeds.
14. Which soil condition most limits root growth?
A. Loamy soil
B. Compacted soil B. Compacted soil
C. Sandy soil
D. Organic soil
Compaction reduces oxygen availability.
, 15. What is crown reduction pruning used for?
A. Killing trees
B. Reducing overall tree height/weight B. Reducing overall tree height/weight
C. Increasing fruit size
D. Removing roots
It reduces risk while maintaining structure.
16. Which pest is known for boring into wood?
A. Aphids
B. Bark beetles B. Bark beetles
C. Caterpillars
D. Ants
Bark beetles tunnel into cambium layers.
17. What is included in a tree risk assessment?
A. Tree color
B. Likelihood of failure and impact B. Likelihood of failure and impact
C. Leaf size only
D. Soil pH only
Risk assessment evaluates failure probability and consequences.
18. What is the role of leaves?
A. Absorb minerals
B. Photosynthesis B. Photosynthesis
C. Anchor tree
D. Store water
Leaves convert sunlight into energy.
19. Which pruning type removes dead branches?
A. Structural pruning
B. Deadwooding B. Deadwooding
C. Topping
D. Pollarding
Deadwooding removes non-living material.
20. What is the safest way to fell a tree?
A. Random cutting
B. Planned directional felling B. Planned directional felling
C. Burning base
D. Pulling with rope only
Controlled direction reduces hazards.
21. What is included in Personal Protective Equipment (PPE) for arborists?
A. Sandals
B. Helmet, gloves, eye protection B. Helmet, gloves, eye protection
C. Sunglasses only
D. Shorts
PPE protects against injury.
22. What causes chlorosis in leaves?
A. Excess water
B. Nutrient deficiency (often iron) B. Nutrient deficiency (often iron)
C. Too much pruning
QUESTIONS FORM REAL EXAMS LATEST 2025-2026
UPDATE WITH 150 QUESTIONS & 100% CORRECT
DETAILED ANSWERS GRADED A+ (BRAND NEW!!)
1. What is the primary function of xylem in trees?
A. Food storage
B. Transport of water and minerals B. Transport of water and minerals
C. Photosynthesis
D. Hormone production
Xylem conducts water and dissolved minerals from roots to leaves.
2. Which tissue is responsible for secondary growth in trees?
A. Epidermis
B. Phloem
C. Vascular cambium C. Vascular cambium
D. Cortex
The vascular cambium produces new xylem and phloem cells.
3. The most appropriate pruning cut to remove a branch is made:
A. Flush with the trunk
B. Just outside the branch collar B. Just outside the branch collar
C. Midway on the branch
D. At the branch tip
Cutting outside the branch collar helps natural wound closure.
4. Which tree part anchors it to the soil and absorbs water?
A. Leaves
B. Roots B. Roots
C. Bark
D. Buds
Roots stabilize the tree and take up water and nutrients.
5. What is the main cause of tree failure during storms?
A. Excess fruit load
B. Poor pruning only
C. Structural defects and weak attachments C. Structural defects and weak
attachments
D. High humidity
Defects like codominant stems increase failure risk.
6. Which is a key principle of ANSI A300 pruning standards?
A. Random cutting
B. Topping trees
C. Natural target pruning C. Natural target pruning
D. Removing all branches
ANSI A300 promotes cuts that preserve tree health.
7. What is the function of phloem?
A. Water transport
, B. Sugar transport B. Sugar transport
C. Structural support
D. Mineral storage
Phloem distributes sugars produced in photosynthesis.
8. What is a common symptom of root rot?
A. Bright green leaves
B. Wilting and dieback B. Wilting and dieback
C. Increased flowering
D. Faster growth
Root rot limits water uptake causing decline.
9. Which tool is most appropriate for large branch removal?
A. Hand trowel
B. Pole pruner
C. Chainsaw C. Chainsaw
D. Rake
Chainsaws are used for larger woody material.
10. What is the best practice when climbing a tree?
A. Free climbing
B. Using certified climbing systems B. Using certified climbing systems
C. Climbing without PPE
D. Climbing in wet conditions only
Proper climbing systems improve safety.
11. What is codominance in trees?
A. One trunk dominates
B. Two stems of equal size grow together B. Two stems of equal size grow together
C. Root competition
D. Leaf clustering
Codominant stems are structurally weak.
12. Which organism commonly causes Dutch elm disease?
A. Bacteria
B. Fungus B. Fungus
C. Virus
D. Nematode
Fungal pathogens spread via beetles.
13. What is the main purpose of tree mulching?
A. Increase heat
B. Improve soil moisture retention B. Improve soil moisture retention
C. Kill roots
D. Prevent photosynthesis
Mulch conserves moisture and reduces weeds.
14. Which soil condition most limits root growth?
A. Loamy soil
B. Compacted soil B. Compacted soil
C. Sandy soil
D. Organic soil
Compaction reduces oxygen availability.
, 15. What is crown reduction pruning used for?
A. Killing trees
B. Reducing overall tree height/weight B. Reducing overall tree height/weight
C. Increasing fruit size
D. Removing roots
It reduces risk while maintaining structure.
16. Which pest is known for boring into wood?
A. Aphids
B. Bark beetles B. Bark beetles
C. Caterpillars
D. Ants
Bark beetles tunnel into cambium layers.
17. What is included in a tree risk assessment?
A. Tree color
B. Likelihood of failure and impact B. Likelihood of failure and impact
C. Leaf size only
D. Soil pH only
Risk assessment evaluates failure probability and consequences.
18. What is the role of leaves?
A. Absorb minerals
B. Photosynthesis B. Photosynthesis
C. Anchor tree
D. Store water
Leaves convert sunlight into energy.
19. Which pruning type removes dead branches?
A. Structural pruning
B. Deadwooding B. Deadwooding
C. Topping
D. Pollarding
Deadwooding removes non-living material.
20. What is the safest way to fell a tree?
A. Random cutting
B. Planned directional felling B. Planned directional felling
C. Burning base
D. Pulling with rope only
Controlled direction reduces hazards.
21. What is included in Personal Protective Equipment (PPE) for arborists?
A. Sandals
B. Helmet, gloves, eye protection B. Helmet, gloves, eye protection
C. Sunglasses only
D. Shorts
PPE protects against injury.
22. What causes chlorosis in leaves?
A. Excess water
B. Nutrient deficiency (often iron) B. Nutrient deficiency (often iron)
C. Too much pruning
