Certified Arborist Test Cabling Bracing and Support Systems 1

Question 1

What cable material does the ISA specify as the standard for static high cabling installations in trees?

Accepted Answer

Galvanized Extra High Strength (EHS) wire rope

Answer

Synthetic polyester braided rope

Answer

Stainless steel aircraft cable

Answer

Kevlar fiber cord

Question 2

According to ISA Best Management Practices, how frequently should installed cabling and bracing systems be inspected?

Accepted Answer

Annually and after any significant storm or loading event

Answer

Every five years as part of a long-term care plan

Answer

Only when visible sagging or hardware corrosion is observed

Answer

Once every ten years unless the tree shows decline

Question 3

When a cabling system is installed on a tree with co-dominant stems, what complementary pruning practice is most commonly recommended to reduce stress on the cable?

Accepted Answer

Performing crown reduction on the supported stem or limb

Answer

Removing all lateral branches from both stems below the cable

Answer

Applying wound sealant to the included bark union

Answer

Raising the crown by removing lower scaffold branches

Question 4

What is the primary structural advantage of a triangulated (three-point or multi-point) cabling system over a simple two-point system?

Accepted Answer

It distributes loads in multiple directions, resisting movement from any compass point

Answer

It requires less total cable length, reducing installation cost

Answer

It eliminates the need for periodic hardware re-tensioning

Answer

It is the only system approved for trees under utility lines

Question 5

What is the purpose of a turnbuckle included in a static cabling system?

Accepted Answer

To adjust and set cable tension during and after installation

Answer

To allow controlled dynamic movement that mimics a flexible cabling system

Answer

To join two separate cable segments of different diameters

Answer

To prevent galvanic corrosion where cable meets eyebolt hardware

Question 6

Which condition most clearly indicates that a threaded brace rod is needed in addition to, or instead of, a cable alone?

Accepted Answer

A longitudinal crack or split in the stem that allows the two sides to move apart laterally

Answer

A tree exhibiting a gradual lean away from the prevailing wind direction

Answer

A tree with more than five co-dominant leaders in the upper crown

Answer

An included bark union located higher than two-thirds of the total tree height