CTSP Hazard and Risk Assessment 5

Question 1

A mature tree displays reaction wood (tension wood in hardwoods) on one side of the trunk. What does this indicate about the tree's history?

Accepted Answer

The tree has compensated for a lean or mechanical stress over time

Answer

Reaction wood forms as a tree compensates for a persistent lean or mechanical stress, indicating the tree has experienced or adapted to gravitational or wind loading.

Question 2

Which of the following is an example of a PRIMARY failure mode in tree risk assessment?

Accepted Answer

Whole tree windthrow due to root decay

Answer

Whole tree windthrow caused by root decay is a primary failure mode, meaning the tree fails due to its own structural deficiency rather than an external force.

Question 3

What does a 'likelihood of impact' rating consider when the target is an occupied parking lot open 10 hours per day?

Accepted Answer

The probability that a person or vehicle would be in the failure zone when failure occurs

Answer

Likelihood of impact estimates the probability that a target will be present in the failure zone at the moment of failure, considering occupancy patterns.

Question 4

An arborist inspects a tree and notes significant dieback in the upper crown with epicormic sprouting lower on the trunk. Which condition does this pattern typically suggest?

Accepted Answer

Decline or chronic stress causing energy redirection to lower sprouts

Answer

Upper crown dieback combined with lower epicormic sprouting is a classic sign of tree decline, where the tree redirects limited energy closer to the root system.

Question 5

Under the ANSI A300 Part 9 standard, who is qualified to perform an advanced-level tree risk assessment?

Accepted Answer

A qualified arborist with documented training in tree risk assessment

Answer

ANSI A300 Part 9 requires that advanced risk assessments be performed by a qualified arborist who has documented training such as ISA TRAQ certification.

CTSP - Certified Treecare Safety Professional Practice Test

CTSP - Certified Treecare Safety Professional Practice Test

CTSP Hazard and Risk Assessment 5