CTSP Hazard and Risk Assessment 4

Question 1

A tree assessment reveals a large crack running vertically through the trunk. Which term describes this condition?

Accepted Answer

Shear crack with potential for rapid failure

Answer

A vertical crack through the trunk can indicate a shear crack caused by torsional or bending loads and presents a significant failure risk.

Question 2

Which assessment interval is generally recommended for trees rated as 'high risk' with mitigation deferred?

Accepted Answer

Annually or more frequently

Answer

High-risk trees with deferred mitigation should be reassessed annually or more frequently because conditions can deteriorate rapidly.

Question 3

What is the significance of the 'failure zone' in tree risk assessment site planning?

Accepted Answer

The area that would be struck if the tree or a part failed

Answer

The failure zone is the area that would be impacted by falling tree parts, and it is used to identify whether targets are at risk.

Question 4

During a post-storm assessment, an arborist finds a tree with a partially detached branch hanging in the canopy. This condition is commonly called:

Accepted Answer

A widow maker or hangar

Answer

A partially detached or suspended branch caught in the canopy is called a widow maker or hangar and poses an immediate hazard to workers below.

Question 5

Which tree defect is characterized by a sudden, unpredictable failure of large branches during calm, hot weather in summer?

Accepted Answer

Summer branch drop (sudden branch drop)

Answer

Summer branch drop is a poorly understood phenomenon where large limbs fail without warning during hot, dry, calm conditions.

CTSP - Certified Treecare Safety Professional Practice Test