Certified Arborist Test Pruning Principles and Practices Questions and Answers

Question 1

An arborist is performing structural pruning on a young maple tree.
They identify two codominant stems of roughly equal size forming a 'V' shaped union with included bark.
According to best practices, what is the most appropriate action to take?

Accepted Answer

Shorten one of the stems using a reduction cut, subordinating it to the other.

Answer

Remove one of the stems completely back to the trunk.

Answer

Leave both stems to develop naturally, as the tree will self-correct.

Answer

Install a cable between the two stems to provide support.

Question 2

When making a proper final pruning cut to remove a lateral branch from a trunk, the cut should be made just outside the branch collar and branch bark ridge. What is the primary reason for preserving the branch collar?

Accepted Answer

It contains a zone of specialized tissue that helps compartmentalize decay.

Answer

It contains dormant buds that will sprout new branches.

Answer

It provides mechanical support to the branch being removed.

Answer

It is primarily composed of phloem and carries sugars to the branch.

Question 3

A client asks an arborist to significantly reduce the height of a mature sweetgum tree that has grown too large for its location. The client suggests 'topping' the tree. Which of the following is the most significant negative consequence of topping?

Accepted Answer

It leads to the growth of weakly attached, vigorous watersprouts.

Answer

It permanently stops the tree from growing any taller.

Answer

It immediately improves the tree's structural integrity.

Answer

It reduces the tree's water requirements by more than 50%.

Question 4

Which of the following pruning objectives specifically involves the removal of dead, diseased, dying, or broken branches?

Accepted Answer

Crown cleaning

Answer

Crown raising

Answer

Crown thinning

Answer

Crown reduction

Question 5

According to ANSI A300 standards, what is the general maximum percentage of live foliage that should be removed from a mature, healthy tree in a single year?

Accepted Answer

25%

Answer

10%

Answer

50%

Answer

75%

Question 6

A client wants to prune a large oak tree in mid-autumn because the leaves are falling and the branch structure is visible. Why is this generally considered a poor time to prune most deciduous trees?

Accepted Answer

Wound closure is slow as the tree enters dormancy, increasing decay potential.

Answer

The tree is actively transporting nutrients to the branches.

Answer

Pruning at this time encourages vigorous new growth before winter.

Answer

Insects and pathogens are most active during the fall.

An arborist is performing structural pruning on a young maple tree.They identify two codominant stems of roughly equal size forming a 'V' shaped union with included bark.According to best practices, what is the most appropriate action to take?

An arborist is performing structural pruning on a young maple tree.
They identify two codominant stems of roughly equal size forming a 'V' shaped union with included bark.
According to best practices, what is the most appropriate action to take?