ISA Arborist Certification Practice Exams Questions With Correc
Answers Already Passed!!!
1. The ideal soil ratio for solids to pore space is: D
(A) 20:80 (B) 35:65 (C) 40:60 (D) 50:50
2. What is the correct scientific name for the oak tree A
genus?
(A) Quercus (B) Pyrus (C) Larix (D) Acer
3. Which of the following is not one of the five major C
categories of soil horizons?
(A) O (B) E (C) N (D) B
4. Loam is least composed of what soil classification? C
(A) Sand(B) Silt(C) Clay(D) Loam is composed of
all soils evenly
5. What is the difference in magnitude of acidity be- D
tween a PH level reading of 4 vs. a PH reading of 7?
(A) 1(B) 3(C) 100 (D) 1000
6. What is not a detrimental impact on tree growth from C
compaction?
(A)Restricted root growth
(B)Reduction of water availability
(C)Increasing organic material
(D)Restricting air movement
7. Field capacity is achieved after the draining of which A
of the following?
(A)Gravitational water
(B)Capillary water
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,ISA Arborist Certification Practice Exams Questions With Correc
Answers Already Passed!!!
(C)Micropore water
(D)Compacted drainage
2/
78
, ISA Arborist Certification Practice Exams Questions With Correc
Answers Already Passed!!!
8. What best defines the permanent wilting point soil C
moisture condition?
(A)Water is present in macro and micropores
(B)The condition present immediately after
the re- moval of gravitational water
(C) Water is held by soil but unavailable to
plants such that they can't recover
(D)No water present in soil
9. What soil below most likely has the lowest infiltration D
rate?
(A)Loose sand
(B)Compacted sand
(C)Loose clay
(D)Compacted clay
10. What major soil horizon category is not included in the D
zone designated as topsoil?
(A) A (B) O (C) E (D) C
11. What soil type is most easily compacted? B
(A) Sand(B) Clay(C) Silt(D) Bedrock
12. What is not a tree characteristic which helps to prevent A
the loss of water?
(A) Increased leaf surface area (B) Deep root
sys- tems(C) Leaf hairs(D) Waxy outer leaf
layer
13. What irrigation system type provides water slowly to A
3/
78
, ISA Arborist Certification Practice Exams Questions With Correc
Answers Already Passed!!!
specific areas of the tree root zone?
(A) Drip irrigation(B) High-pressure injection (C) Basin
4/
78
Answers Already Passed!!!
1. The ideal soil ratio for solids to pore space is: D
(A) 20:80 (B) 35:65 (C) 40:60 (D) 50:50
2. What is the correct scientific name for the oak tree A
genus?
(A) Quercus (B) Pyrus (C) Larix (D) Acer
3. Which of the following is not one of the five major C
categories of soil horizons?
(A) O (B) E (C) N (D) B
4. Loam is least composed of what soil classification? C
(A) Sand(B) Silt(C) Clay(D) Loam is composed of
all soils evenly
5. What is the difference in magnitude of acidity be- D
tween a PH level reading of 4 vs. a PH reading of 7?
(A) 1(B) 3(C) 100 (D) 1000
6. What is not a detrimental impact on tree growth from C
compaction?
(A)Restricted root growth
(B)Reduction of water availability
(C)Increasing organic material
(D)Restricting air movement
7. Field capacity is achieved after the draining of which A
of the following?
(A)Gravitational water
(B)Capillary water
1/
78
,ISA Arborist Certification Practice Exams Questions With Correc
Answers Already Passed!!!
(C)Micropore water
(D)Compacted drainage
2/
78
, ISA Arborist Certification Practice Exams Questions With Correc
Answers Already Passed!!!
8. What best defines the permanent wilting point soil C
moisture condition?
(A)Water is present in macro and micropores
(B)The condition present immediately after
the re- moval of gravitational water
(C) Water is held by soil but unavailable to
plants such that they can't recover
(D)No water present in soil
9. What soil below most likely has the lowest infiltration D
rate?
(A)Loose sand
(B)Compacted sand
(C)Loose clay
(D)Compacted clay
10. What major soil horizon category is not included in the D
zone designated as topsoil?
(A) A (B) O (C) E (D) C
11. What soil type is most easily compacted? B
(A) Sand(B) Clay(C) Silt(D) Bedrock
12. What is not a tree characteristic which helps to prevent A
the loss of water?
(A) Increased leaf surface area (B) Deep root
sys- tems(C) Leaf hairs(D) Waxy outer leaf
layer
13. What irrigation system type provides water slowly to A
3/
78
, ISA Arborist Certification Practice Exams Questions With Correc
Answers Already Passed!!!
specific areas of the tree root zone?
(A) Drip irrigation(B) High-pressure injection (C) Basin
4/
78
