Isa Arborist Certification Exam 1 & 2 Testbank All 600 Questions And Detailed Solutions Latest Update This Year

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ISA Arborist Certification Exam 1 & 2 TESTBANK ALL
600 QUESTIONS AND DETAILED SOLUTIONS LATEST
UPDATE THIS YEAR


QUESTION: What soil type is most easily compacted?

(A) Sand

(B) Clay

(C) Silt

(D) Bedrock - ANSWER-The answer is (B)




Since clay has the smallest individual particles, they may be compressed to minimize the
amount of space between the particles more easily than other soil types.




QUESTION: 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 - ANSWER-The answer is (A)




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

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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.




QUESTION: What irrigation system type provides water slowly to specific areas of the tree root
zone?

(A) Drip irrigation

(B) High-pressure injection (C) Basin irrigation

(D) Soaker hose - ANSWER-The answer is (A)




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.




QUESTION: 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 - ANSWER-The
answer is (D)




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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




QUESTION: What is not an advantage of the use of mulching?

(A) Improve infiltration

(B) Promote deep root system (C) Reduce soil evaporation (D) Limit weed competition -
ANSWER-The answer is (B)




Mulching provides a layer above the soil which can retain water and help to improve the
infiltration as well as reduce evaporation. The mulch also will prevent weeds from growing in
the surrounding area which can steal water from the tree. It does not have an impact on the
structure of the root system.




QUESTION: What is the minimum slope for drainage pipes placed above an impervious layer?

(A) 1/16" per ft (B) 1/8" per ft (C) 1/4" per ft (D) 1/2" per ft - ANSWER-The answer is (C)




Drainage pipes should have a slope of at least 1/4" per linear ft.




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QUESTION: The main function of a rain garden is which of the following?

(A) Collect and hold stormwater runoff (B) Increase water infiltration

(C) Distribute runoff to dry areas

(D) Facilitate deep root systems - ANSWER-The answer is (A)




In areas where drainage is a concern, rain gardens can handle a large amount of water in
flooding events. They are often used at the base of sloped or collection areas such as parking
lots.

Q: The ideal soil ratio for solids to pore space is:




(A) 20:80

(B) 35:65

(C) 40:60

(D) 50:50 - ANSWER-The answer is (D)




An even split between the amount of solids and the amount of pore space is the ideal
condition. This allows the pore space to contain sufficient amounts of water and air while
maintaining the soil integrity. The solids ideally are 45% mineral and 5% organic matter.




QUESTION: What is the correct scientific name for the oak tree genus?



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