Introduction to Tree Risk Assessment Flashcards

1
Q

an interference between the needs of a tree and society or infrastructure

A

Tree conflict

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2
Q

an organized and systematic examination

A

Inspection

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3
Q

the highest level of risk that does not exceed the owner/manager’s tolerance

A

Acceptable Risk Threshold

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4
Q

the likelihood of a conflict or tree failure occurring and affecting a target, and the severity of the associated consequences

A

Risk

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5
Q

a systematic process used to identify, analyze, and evaluate tree risk

A

Tree Risk Assessment

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6
Q

the process of comparing the assessed risk against given risk criteria to determine the significance of the risk

A

Tree Risk Evaluation

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7
Q

the application of policies, procedures, and practices used to identify, evaluate, mitigate, monitor, and communicate tree risk.

A

Tree Risk Management

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8
Q

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

A

Target

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9
Q

breakage of stem, branch, or roots, or loss mechanical support in the root system.

A

Failure

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10
Q

personal injury or death, property damage, or disruption of activities

A

Harm

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11
Q

the chance of tree failure occurring and/or impacting a specified target

A

Likelihood

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12
Q

outcome of an event

A

Consequences

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13
Q

the tree part(s) identified as a likely source of harm

A

Hazard

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14
Q

a process to estimate numerical probability values for consequences and to calculate numeric values for risk.

A

Quantitative Risk Assessment

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15
Q

a process using ratings of consequences and likelihood to determine risk significance levels and to evaluate the level of risk

A

Qualitative Risk Assessment

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16
Q

restraints or factors that restrict the precision, applicability, or extent of something.

A

Limitations

17
Q

the defined project objectives and requirements

A

Scope of work

18
Q

The scope of work should include specifications for the following:

A

1) Tree(s) or area to be assessed
2) Level and details of the assessment
3) Method of reporting
4) Timetable for inspection and reporting
5) Risk rating and mitigation

19
Q

time period for which an assessment is defined.

A

Time frame

20
Q

the body of moral principles or values governing a group or individual’s conduct.

A

Ethics

21
Q

something for which one is responsible

A

Liability

22
Q

a principle or rule established by a prior court or other decision-making body

A

Legal precedents

23
Q

legal obligation that requires an individual to apply reasonable actions when performing tasks that may potentially harm others.

A

Duty of care

24
Q

failure to take reasonable care to avoid injury or damage to a person or property in a situation where the law imposes a duty of care.

A

Breach of duty

25
Q

failure to use reasonable care, resulting in damage or injury to another.

A

Negligence

26
Q

degree of care that a reasonable person should exercise in performing duty of care; a measurement used to assess whether an individual acted in a reasonable manner

A

Standard of care

27
Q

True/False

The tree risk assessor determines the acceptable risk threshold.

A

False

28
Q

True/False
When balancing tree risks and benefits, it is important to remember that the risk trees pose to human safety is extremely low.

A

True

29
Q

A tree risk assessor is free of risk while inspecting trees because mitigation measures have yet to be taken.

A

False

30
Q

A large tree leaning over a busy intersection and a bus stop might be evaluated as having severe __________, should the tree fail, because of the potential to injure people and damage property.

A

consequences

31
Q

A __________ tree risk assessment often uses ratings combined in a matrix to evaluate the risk, whereas a __________ tree risk assessment produces a numeric value based on probabilities and consequences.

A

qualitative

quantitative

32
Q

Prior to performing a tree risk assessment, it is important to work with the tree owner/manager to define the __________.

A

scope of work

33
Q

Tree structural __________ are commonly caused by a combination of structural defects or conditions, such as the presence of decay or poor structure, and an unusual or extreme loading event.

A

failures

34
Q

A tree risk assessor must use the generally accepted __________ when evaluating tree risk or s/he might be found negligent in a court.

A

standard of care

35
Q

The process of identifying trees, assessing them for risk, determining and applying mitigation options, and maintaining an ongoing monitoring system is referred to as

A) tree risk assessment
B) tree risk management
C) inspection protocol
D) tree evaluation protocol

A

B) tree risk management

36
Q

It is impossible to maintain trees free of risk because

A) trees are living organisms and naturally lose branches or fall
B) tree maintenance budgets are too limited for risk mitigation
C) there aren’t enough arborists to assess all risks
D) not all practices can be applied in the same way to all trees

A

A) trees are living organisms and naturally lose branches or fall

37
Q

Because tree risk assessors may perform risk assessments with limited information about tree and site conditions, the assessment is

A) invalid due to high levels of uncertainty
B) mostly dependent on the target occupancy rate
C) mostly dependent on the target value
D) founded on observations, experience, and training

A

D) founded on observations, experience, and training

38
Q

The scope of work should clarify

A) any property boundaries that restrict access to the tree(s)
B) local government or authority’s requirements for inspection and permitting
C) to whom the final report is to be submitted
D) all of the above

A

D) all of the above

39
Q

Standard of care is measured by using

A) the best management practices, applicable industry standards, and training courses
B) the laws that are enforced by city ordinances
C) the level of care deemed reasonable by the tree owner/manager
D) all of the above

A

A) the best management practices, applicable industry standards, and training courses