ISA Arborist Certification Exam TEST BANK (400+
Ques & Ans) () Questions and Verifie
Rationalized Answers, 100% Passing Score 1
1. The ideal soil ratio for solids to pore space is:
(A) 20:80 (B) 35:65 (C) 40:60 (D) 50:50: D
2. What is the correct scientific name for the oak tree genus?
(A) Quercus (B) Pyrus (C) Larix (D) Acer: 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: C
4. Loam is least composed of what soil classification?
(A) Sand(B) Silt(C) Clay(D) Loam is composed of all soils evenly:
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: D
6. What is not a detrimental impact on tree growth from
compaction?
(A) Restricted root growth
(B) Reduction of water availability
(C) Increasing organic material
(D) Restricting air movement: 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: 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 water
(C) Water is held by soil but unavailable to plants such that they
can't recover
(D) No water present in soil: C
9. What soil below most likely has the lowest infiltration rate?
(A) Loose sand
(B) Compacted sand
(C) Loose clay
(D) Compacted clay: D
10. What major soil horizon category is not included in the
zone designated as topsoil?
(A) A (B) O (C) E (D) C: D
, 11. What soil type is most easily compacted?
(A) Sand(B) Clay(C) Silt(D) Bedrock: B
Ques & Ans) () Questions and Verifie
Rationalized Answers, 100% Passing Score 1
1. The ideal soil ratio for solids to pore space is:
(A) 20:80 (B) 35:65 (C) 40:60 (D) 50:50: D
2. What is the correct scientific name for the oak tree genus?
(A) Quercus (B) Pyrus (C) Larix (D) Acer: 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: C
4. Loam is least composed of what soil classification?
(A) Sand(B) Silt(C) Clay(D) Loam is composed of all soils evenly:
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: D
6. What is not a detrimental impact on tree growth from
compaction?
(A) Restricted root growth
(B) Reduction of water availability
(C) Increasing organic material
(D) Restricting air movement: 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: 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 water
(C) Water is held by soil but unavailable to plants such that they
can't recover
(D) No water present in soil: C
9. What soil below most likely has the lowest infiltration rate?
(A) Loose sand
(B) Compacted sand
(C) Loose clay
(D) Compacted clay: D
10. What major soil horizon category is not included in the
zone designated as topsoil?
(A) A (B) O (C) E (D) C: D
, 11. What soil type is most easily compacted?
(A) Sand(B) Clay(C) Silt(D) Bedrock: B
