ISA - CERTIFIED ARBORIST - TEST QUESTIONS #2 –
PRF TEST STUDY GUIDE QUESTIONS AND VERIFIED
RATIONALIZED ANSWERS, 100% PASSING SCORE
GUARANTEE
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
2. What is most likely NOT a possible cause of deformed leaves? PEB pg 42
- spray injury
- air pollution
- anthracnose
- frost: Air pollution
,3. 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
4. What insect listed below is classified as having piercing or sucking mouth-
parts? PEB Pg43
- leafhoppers
- Beetles
- weevils
- borers: leafhoppers
5. What herbicide type eliminates the whole of the plant over a short period of
time? PEB Pg43
- Pre-emergent
- Contact
- Systemic
- Drench: systemic
6. 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
7. Which of the following is NOT classified as an insect? PEB Pg43
- Mites
- Beetles
- Moths
- Caterpillars: Mites
,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
9. 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
- growth
- aesthetics
- defense: aesthetics
12. What statement below is TRUE regarding how a tree's growth rate and
photosynthesis rate will react to the amount of available resources? PEB
Pg45
- The growth rate will be limited before the photosynthesis rate
- The photosynthesis rate will be limited before the growth rate
- The photosynthesis and growth rate become hindered equally with
limited resources
- The photosynthesis rate will not be hindered by limited resources: The growth
rate will be limited before the photosynthesis rate
13. What single resource has the most detrimental effect on a tree's ability to
perform photosynthesis if limited? PEB Pg45
- Light
- Water
- CO2
- None of the above: None of the above
, 14. What extract listed below is NOT an allelochemical classified as a natural
insecticide? PEB Pg45
- Nicotine
- Lignin
- Rotenone
- Neem: Lignin
15. A tree is identified as being in the mortality spiral when what has occurred?
PEB Pg45
- the tree has begun to see detrimental stress factors
- the tree has seen an isolated but severely detrimental stress factor
- Cumulative stress factors have yielded a situation where very few actions
can save the tree.
- Any combination of stress factors has occurred over time: Cumulative stress
factors have yielded a situation where very few actions can save the tree.
16. The foundational element of an appropriate response process (ARP) is
which of the following? PEB Pg46
- monitoring
- immediate action
- establish thresholds
- readily available resources: Monitoring
17. What is NOT a characteristic of any organism classified as a pest? PEB
Pg46
- Threatens health or appearance of plants
- May also contribute to the surrounding landscape
- Provides competition to the local landscape
- Diminishes safety or enjoyment of an area: May also contribute to the surround-
ing landscape
18. Key stressors are identified by what criteria? PEB Pg46
- universally detrimental site conditions
- Retroactive analysis of stress
- Identifying local pests and conditions which may be detrimental.
- species specific historical stressors: Identifying local pests and conditions
which may be detrimental.
19. Key plants can be identified by which of the following criteria? PEB Pg46
- client specific indications
- specific species
- susceptibility to specific pests
- all of the above: all of the above
PRF TEST STUDY GUIDE QUESTIONS AND VERIFIED
RATIONALIZED ANSWERS, 100% PASSING SCORE
GUARANTEE
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
2. What is most likely NOT a possible cause of deformed leaves? PEB pg 42
- spray injury
- air pollution
- anthracnose
- frost: Air pollution
,3. 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
4. What insect listed below is classified as having piercing or sucking mouth-
parts? PEB Pg43
- leafhoppers
- Beetles
- weevils
- borers: leafhoppers
5. What herbicide type eliminates the whole of the plant over a short period of
time? PEB Pg43
- Pre-emergent
- Contact
- Systemic
- Drench: systemic
6. 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
7. Which of the following is NOT classified as an insect? PEB Pg43
- Mites
- Beetles
- Moths
- Caterpillars: Mites
,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
9. 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
- growth
- aesthetics
- defense: aesthetics
12. What statement below is TRUE regarding how a tree's growth rate and
photosynthesis rate will react to the amount of available resources? PEB
Pg45
- The growth rate will be limited before the photosynthesis rate
- The photosynthesis rate will be limited before the growth rate
- The photosynthesis and growth rate become hindered equally with
limited resources
- The photosynthesis rate will not be hindered by limited resources: The growth
rate will be limited before the photosynthesis rate
13. What single resource has the most detrimental effect on a tree's ability to
perform photosynthesis if limited? PEB Pg45
- Light
- Water
- CO2
- None of the above: None of the above
, 14. What extract listed below is NOT an allelochemical classified as a natural
insecticide? PEB Pg45
- Nicotine
- Lignin
- Rotenone
- Neem: Lignin
15. A tree is identified as being in the mortality spiral when what has occurred?
PEB Pg45
- the tree has begun to see detrimental stress factors
- the tree has seen an isolated but severely detrimental stress factor
- Cumulative stress factors have yielded a situation where very few actions
can save the tree.
- Any combination of stress factors has occurred over time: Cumulative stress
factors have yielded a situation where very few actions can save the tree.
16. The foundational element of an appropriate response process (ARP) is
which of the following? PEB Pg46
- monitoring
- immediate action
- establish thresholds
- readily available resources: Monitoring
17. What is NOT a characteristic of any organism classified as a pest? PEB
Pg46
- Threatens health or appearance of plants
- May also contribute to the surrounding landscape
- Provides competition to the local landscape
- Diminishes safety or enjoyment of an area: May also contribute to the surround-
ing landscape
18. Key stressors are identified by what criteria? PEB Pg46
- universally detrimental site conditions
- Retroactive analysis of stress
- Identifying local pests and conditions which may be detrimental.
- species specific historical stressors: Identifying local pests and conditions
which may be detrimental.
19. Key plants can be identified by which of the following criteria? PEB Pg46
- client specific indications
- specific species
- susceptibility to specific pests
- all of the above: all of the above
