Hazard Identification and Control Flashcards
7 cards from real CTSP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Hazard Identification and Control flashcards as text
A tree worker identifies a 'hangar' (widow maker) lodged in the canopy above the work area. The safest course of action is to:
Answer: Remove all personnel from the area and dislodge it using rigging from a safe position
Hangars must be removed with all personnel clear of the drop zone, using rigging or tools that keep workers out from beneath the falling material.
Which environmental condition most significantly increases the risk of tree failure during pruning or removal operations?
Answer: High winds exceeding recommended safe limits
High winds increase dynamic loading on trees and falling material, dramatically raising the risk of unexpected failures and loss of directional control.
When is it appropriate to use the 'two-second rule' during tree felling?
Answer: To allow the tree to begin moving for two seconds before retreating on the escape route
The feller should watch the tree begin to move and then immediately retreat on the planned escape route without waiting longer than necessary.
Girdling roots are a hazard to tree stability primarily because they:
Answer: Compress the root flare, reducing the effective diameter of the structural root zone
Girdling roots constrict the trunk and structural root zone, reducing the tree's ability to anchor itself and transport water and nutrients, leading to decline and instability.
Under ANSI Z133, who bears primary responsibility for ensuring that all crew members are informed of job hazards before work begins?
Answer: The employer and the qualified supervisor or crew leader on site
ANSI Z133 places primary responsibility on the employer and the on-site qualified supervisor to brief all crew members on identified hazards before work begins.
A tree has a decay column extending from the base to approximately 40% of its total height. Which factor would be MOST important to evaluate next?
Answer: The ratio of residual sound wall thickness to the total trunk diameter at the decay column
The residual wall thickness relative to trunk diameter at the decay column determines whether enough structural wood remains to support the tree safely.
Which of the following is an example of an administrative hazard control in tree care operations?
Answer: Requiring all chainsaw operators to complete documented training before operating equipment
Administrative controls reduce exposure to hazards through policies, procedures, and training requirements rather than physical modifications or PPE.