CNMI Arborist Certification Exam | Questions And
Answers [ plus Rationales] | Qs & Ans 2026/27 |
Graded A
1. What is the primary role of an arborist?
A. Build houses
B. Design roads
C. Plant, maintain, and care for trees
D. Install plumbing systems
Rationale: Arborists specialize in tree health and maintenance.
2. What is tree pruning?
A. Cutting roots only
B. Painting tree bark
C. Selective removal of branches to improve health or structure
D. Fertilizing soil only
Rationale: Pruning improves safety, structure, and growth.
3. What is the purpose of crown thinning?
A. Remove all branches
B. Increase tree height
,C. Remove selected branches to increase light penetration and airflow
D. Cut tree roots
Rationale: Crown thinning improves canopy health and reduces wind
resistance.
4. What is crown reduction?
A. Cutting trunk completely
B. Removing roots
C. Reducing overall tree size by cutting back branches to lateral growth
D. Painting leaves
Rationale: Crown reduction controls tree size while maintaining structure.
5. What is deadwood removal?
A. Fertilizing dead roots
B. Watering dry soil
C. Removing dead, dying, or hazardous branches
D. Increasing canopy density
Rationale: Deadwood removal improves safety and tree health.
6. What is the purpose of tree cabling?
A. Water distribution
B. Soil testing
,C. Provide structural support to weak branches or trunks
D. Increase leaf growth
Rationale: Cabling prevents branch failure.
7. What is tree bracing?
A. Fertilizing trees
B. Painting trunks
C. Installing rigid support rods to stabilize tree structure
D. Removing bark
Rationale: Bracing reinforces weak structural areas.
8. What is arborist PPE?
A. Painting equipment
B. Concrete tools
C. Personal protective equipment such as helmets, gloves, and eye
protection
D. Plumbing tools
Rationale: PPE protects workers from injury.
9. What is a chainsaw primarily used for in arboriculture?
A. Measuring tree height
B. Fertilizing soil
, C. Cutting branches and tree sections safely
D. Watering trees
Rationale: Chainsaws are essential cutting tools.
10. What is tree climbing rope used for?
A. Measuring soil
B. Painting trees
C. Supporting arborists during tree ascent and descent
D. Cutting branches
Rationale: Climbing ropes ensure safe movement in trees.
11. What is a harness used for?
A. Tree fertilization
B. Soil mixing
C. Protecting arborists from falls while working at height
D. Cutting wood
Rationale: Harnesses provide fall protection.
12. What is tree risk assessment?
A. Watering schedule
B. Fertilizer plan
Answers [ plus Rationales] | Qs & Ans 2026/27 |
Graded A
1. What is the primary role of an arborist?
A. Build houses
B. Design roads
C. Plant, maintain, and care for trees
D. Install plumbing systems
Rationale: Arborists specialize in tree health and maintenance.
2. What is tree pruning?
A. Cutting roots only
B. Painting tree bark
C. Selective removal of branches to improve health or structure
D. Fertilizing soil only
Rationale: Pruning improves safety, structure, and growth.
3. What is the purpose of crown thinning?
A. Remove all branches
B. Increase tree height
,C. Remove selected branches to increase light penetration and airflow
D. Cut tree roots
Rationale: Crown thinning improves canopy health and reduces wind
resistance.
4. What is crown reduction?
A. Cutting trunk completely
B. Removing roots
C. Reducing overall tree size by cutting back branches to lateral growth
D. Painting leaves
Rationale: Crown reduction controls tree size while maintaining structure.
5. What is deadwood removal?
A. Fertilizing dead roots
B. Watering dry soil
C. Removing dead, dying, or hazardous branches
D. Increasing canopy density
Rationale: Deadwood removal improves safety and tree health.
6. What is the purpose of tree cabling?
A. Water distribution
B. Soil testing
,C. Provide structural support to weak branches or trunks
D. Increase leaf growth
Rationale: Cabling prevents branch failure.
7. What is tree bracing?
A. Fertilizing trees
B. Painting trunks
C. Installing rigid support rods to stabilize tree structure
D. Removing bark
Rationale: Bracing reinforces weak structural areas.
8. What is arborist PPE?
A. Painting equipment
B. Concrete tools
C. Personal protective equipment such as helmets, gloves, and eye
protection
D. Plumbing tools
Rationale: PPE protects workers from injury.
9. What is a chainsaw primarily used for in arboriculture?
A. Measuring tree height
B. Fertilizing soil
, C. Cutting branches and tree sections safely
D. Watering trees
Rationale: Chainsaws are essential cutting tools.
10. What is tree climbing rope used for?
A. Measuring soil
B. Painting trees
C. Supporting arborists during tree ascent and descent
D. Cutting branches
Rationale: Climbing ropes ensure safe movement in trees.
11. What is a harness used for?
A. Tree fertilization
B. Soil mixing
C. Protecting arborists from falls while working at height
D. Cutting wood
Rationale: Harnesses provide fall protection.
12. What is tree risk assessment?
A. Watering schedule
B. Fertilizer plan
