Arborists' Exam Chapters 11-14

Chapter 12: Choose TWO components of risk

• likelihood

• biological control

• consequences

• translocation

In tree risk assessment, likelihood is a combination of TWO things...

• translocation throughout the plant

• likelihood of impact

• likelihood of failure

• biological control

Choose the three levels of assessment which are in the CORRECT order

• Level 1: Limited Visual Assessment

  Level 2: Basic Assessment

  Level 3: Advanced Assessment

• Level 1: Basic Assessment

  Level 2: Limited Assessment

  Level 3 Advanced Assessment

• Level 1: Advanced Assessment

  Level 2: Basic Assessment

  Level 3: Limited Assessment

Targets are people, property, or activities that could be injured, damaged, or disrupted by a tree failure

• true

• false

The target zone is the area that the tree or branch is likely to hit if it falls

• true

• false

Targets can be categorized by the amount of time that they are within the target zone: their ________

• site conditions

• response growth

• occupancy rate

Choose all factors to consider when assessing the likelihood of impact

• occupancy rate

• direction of fall

• location in the target zone

• protection factors

• all of the above

1: Choose all factors to consider when assessing the likelihood of failure

• site conditions/changes

• loads (wind/weather)

• species failure profile

• protection factors

When assessing the consequences of failure choose FOUR factors to assess

• target value/importance

• direction of fall

• tree or tree part size

• distance of fall

• protection factors

Fungi primarily decay the lignin within and between cell walls in the wood, reducing the wood's stiffness but leaving some flexibility

• White rot

• Brown rot