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ISA Certified Arborist Exam TEST BANK
Questions and Verified Rationalized Answers
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test consisting of 1000 multiple-choice ques with Ans
- 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: Compacted soils decrease the total pore space which will limit the amount of air and water that can be present. Naturally, this has a detrimental effect on facilitating tree growth by affecting root growth and absorption. It does not have an impact on the makeup of the soil itself.
The answer is (C) Increasing organic material
- Field capacity is achieved after the draining of which of the following?
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(A) Gravitational water (B) Capillary water (C) Micropore water (D) Compacted drainage: Filed capacity is the condition after all of the water has drained due to gravity.
The answer is (A) Gravitational water
- 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: Water needs to be available for uptake. If not, the tree will begin to feel the stress of dehydration and wilting will begin to occur. If the lack of water persists over a sufficient amount of time, the tree will not be able to recover and has reached the permanent wilting point.
The answer is (C) Water is held by soil but unavailable to plants such that they can't recover
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(C) Silt (D) Bedrock: Since clay has the smallest individual particles, it may be compressed to minimize the amount of space between the particles more easily than other soil types. The answer is (B) Clay
- What is not a tree characteristic which helps to prevent the loss of water? (A) Increased leaf surface area (B) Deep root systems (C) Leaf hairs (D) Waxy outer leaf layer: Trees are constantly fighting to ensure appropriate levels of water and to retain it from excessive transpirational water loss. Different trees have certain aspects suited to keep sufficient water levels. Deeper roots have a wider range of water to draw from. Leaves may have outer layers or hairs to prevent the water from leaving too quickly. A larger surface area is detrimental to a tree's water retention and some trees will have smaller leaves to help retain the water.
The answer is (A) Increased leaf surface area
- What irrigation system type provides water slowly to specific areas of the tree root zone? (A) Drip irrigation
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(B) High-pressure injection (C) Basin irrigation (D) Soaker hose: Drip irrigation applies water in a slower fashion by emitters spread throughout the root system. This is beneficial in areas of high slopes where runoff is a problem or when the water is evaporating quickly.
The answer is (A) Drip irrigation
- Trees help to control stormwater runoff by all of the following means except: (A) Trees hold water on bark and leaves (B) Roots intercept and retain runoff (C) Fallen leaves create a layer of absorption on the ground (D) All of the above: Trees can contribute to runoff control in several ways including:
- Holding rain on leaves and bark
- Roots retaining soil water
- Fallen leaves create a layer on the ground that prevents it from making it to the ground
The answer is (D) All of the above
- What is not an advantage of the use of mulching? (A) Improve infiltration (B) Promote deep root system
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maintaining the soil integrity. The solids ideally are 45% mineral and 5% organic matter.
The answer is (D)
- What is the correct scientific name for the oak tree genus? (A) Quercus (B) Pyrus (C) Larix (D) Acer: The genus is the first part of a tree's scientific name. The oak tree is designated as Quercus.
The answer is (A) Quercus
- Which of the following is not one of the five major categories of soil hori- zons? (A) O (B) E (C) N (D) B: The five major categories of soil horizons consist of O, E, A, B, and C The answer is (C) N
- Loam is least composed of what soil classification? (A) Sand (B) Silt (C) Clay (D) Loam is composed of all soils evenly: Loam is a combination of all three soil
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types sand, silt, and clay. However, loam without any specific designation is not equally composed of all three but rather has the least amount of clay.
The answer is (C) Clay
- 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: The difference in magnitude is exponential between single PH readings. Therefore, a difference of 1 is equivalent to 101 = 10. For 7 to 4, the difference is 3 and the magnitude of difference becomes 103 = 1000.
The answer is (D)
113 (D) 1000
- The main function of a rain garden is which of the following? (A) Collect and hold stormwater runoff
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available in a low acidic PH and others in a high alkaline environment. Of the options listed, Iron is more available in an acidic PH. The answer is (A) Iron
- Nitrogen is present in soil mostly due to which of the following? (A) Water
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(B) Iron (C) Clay (D) Sand: Nitrogen comes from the amount of organic matter in the soil. The answer is (B) Iron
- Question 21 A 25-lb bag of fertilizer has a 10-6-4 analysis. How many pounds of potassium are in the bag? (A) 1 (B) 2. (C) 4 (D) 8: The analysis of fertilizer provides three numbers that indicate the percentages in pounds of each element. The numbers represent nitrogen-phosphorous-potassium. Therefore, in this example, we have 4% potassium of a 25 lb. bag:
P = 0.04 x 25 = 1.0 lb.
The answer is (A) 1
- Question 22 Required fertilizer distribution rates for quick release are than for that of slow-release. (A) Greater (B) Less
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(C) Surface runoff (D) Shallow root structure: Surface applications of fertilizer are the easiest and quickest to complete. The fertilizer will not penetrate deep and can be spread quickly. One of the disadvantages is that there is a chance for it to be washed away in areas of significant runoff. The answer is (C) Surface runoff
- Question 24 What element can be classified as a micronutrient? (A) Magnesium (B) Calcium (C) Iron (D) Sulfur: Elements associated with tree growth are classified as macro and micronutrients. Macronutrients are those most likely to be deficient in trees and to have detrimental effects. These include nitrogen, phosphorous, potassium, and sulfur. Micronutrients are less likely to be deficient but may cause problems if there is a short supply. Iron is classified as a micronutrient.
The answer is (C) Iron
- Question 25 What method of fertilizer application may result in the development of thick patches of grass in
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spots surrounding the tree? (A) Liquid injection (B) Surface application (C) Foliar application (D) Implants: The increase in grass growth is due to the isolated areas drawing on the localized fertilizer. Liquid injection, as well as the drill hole method, provides fertilizer in isolated spots around the tree and spotty thick grass is a known side effect. The answer is (A) Liquid injection
- Question 26 What characteristic is used to differentiate between vascular plant classifica- tions? (A) Roots (B) Leaves
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(B) Length of petiole (C) Shape of leaflet (D) Number of leaflets: By definition, a compound leaf has two or more leaflets but only a single bud. A single leaf whether simple or compound is around a single bud. The answer is (D) Number of leaflets
- Question 29 What major group of conifers is defined by needles borne in clusters? (A) Pine (B) Spruce (C) Fir (D) Juniper: Conifers are cone-bearing trees. Pines can often be identified due to the needles being in clusters of two, three, or five. The answer is (A) Pine
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- Question 30 What leaf margin type is characterized by having a smooth edge? (A) Entire (B) Serrate (C) Serrulate (D) Dentate: Different leaf margins are classified by the pattern on the edge. The entire simply has a smooth edge.
The answer is (A) Entire
- Question 31 What characteristic below is associated with dicots rather than monocots? (A) Parallel leaf veins (B) Floral parts usually in multiples of four or five (C) Fibrous root system (D) One cotyledon: Of the answers listed the dicots have floral parts usually in multiples of four or five whereas the monocots have them in multiples of threes.
The answer is (B) floral parts usually in multiples of four or five
- Question 32 A tree is to be planted close to a newly built retaining wall for beautification. What habit is most likely appropriate for the selection of the tree. (A) Pyramidal (B) Upright
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environment.
The answer is (B) Low temperatures
- Question 34 What tree can be identified as having palmately compound leaves? (A) Buckeye (B) Ash (C) Ailanthus (D) Walnut: The arrangement of leaflets on a compound leaf can be used as an identifier. They can be pinnate, bipinnate, or palmate. Of the trees listed the buckeye exhibits palmately leaflet arrangements.
The answer is (A) Buckeye
- Question 35 What statement is true below regarding deciduous trees? (A) Allows light in the summer and allows light in the winter (B) Allows light in the summer and blocks light in the winter (C) Blocks light in the summer and allows light in the winter (D) Blocks light in the summer and blocks light in the winter: Deciduous trees lose their leaves in the colder months. Because of this, more light is allowed to pass in the winter and less in the warmer months.
The answer is (C) Blocks light in the summer and allows light in the winter
- Question 36
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What USDA hardiness zone has an average annual extreme minimum temper- ature of -60 to - degrees Fahrenheit? (A) 1 (B) 5 (C) 9 (D) 13: The USDA hardiness zones are an indicator of minimum average tempera- tures a tree can withstand ranging from 1 at the lowest to 13 at the highest. Zone one has a range of -60 to - degrees Fahrenheit.
The answer is (A) 1
- Question 37 What is the minimum distance from the edge of a planting hole to any buried utility? (A) 6" (B) 12"
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