Certified Arborist Test Cabling Bracing and Support Systems 4

Question 1

What is the primary purpose of installing a supplemental support system (cabling or bracing) in a tree?

Accepted Answer

To reduce the risk of failure of weak or defective unions and limbs

Answer

To permanently correct structural defects

Answer

To replace proper pruning of co-dominant stems

Answer

To increase the tree's uptake of water and nutrients

Question 2

According to ANSI A300 Part 3 standards, what type of hardware is recommended for installing high-strength steel cables in trees?

Accepted Answer

Stainless-steel or galvanized eye bolts with thimbles and swaged or mechanical fittings

Answer

Galvanized lag bolts with eye hooks

Answer

Copper wire twisted around the branch

Answer

Nylon rope secured with friction clamps

Question 3

When installing a dynamic (flexible) cabling system compared to a static system, which statement is most accurate?

Accepted Answer

Dynamic systems allow limited natural movement and may reduce the zone of reaction wood formation

Answer

Dynamic systems prevent all movement between co-dominant stems

Answer

Dynamic systems provide greater restraint than static steel cable systems

Answer

Dynamic systems require thicker bolts than static systems

Question 4

A brace rod is most appropriately used in a tree when:

Accepted Answer

Two large co-dominant stems are at risk of splitting apart at the union

Answer

The tree requires staking after transplanting

Answer

A single branch must be held closer to the trunk

Answer

The root system needs structural support

Question 5

After installing a static cable support system, how frequently does ISA recommend the system be inspected?

Accepted Answer

Annually, or after any significant storm event

Answer

Every five years

Answer

Every 10 years

Answer

Only when visible damage is observed

Question 6

What is 'included bark' in the context of tree structure, and why is it significant when assessing the need for cabling?

Accepted Answer

Bark tissue embedded within a co-dominant union, indicating a structurally weak attachment

Answer

Bark that has grown over a pruning cut, indicating successful wound closure

Answer

The inner bark layer (phloem) visible after bark removal

Answer

Bark that has been included in a root graft between two trees