CTSP CTSP Struck-By and Falling Object Hazards 1 — Questions and Answers
Question 1: According to ANSI Z133, what is the minimum safe distance bystanders must maintain from tree removal operations?
- Equal to the height of the tree being removed
- Twice the height of the tree being removed (Correct answer)
- A fixed distance of 50 feet from the tree
- A fixed distance of 10 feet from the work zone
Correct answer: Twice the height of the tree being removed
ANSI Z133 requires bystanders to stay at a distance of at least twice the height of the tree to account for the possibility of unexpected total tree failure.
Question 2: What is the primary purpose of establishing a drop zone during tree removal operations?
- To indicate where the aerial lift should be positioned
- To designate where cut pieces will fall and keep non-essential personnel clear (Correct answer)
- To mark safe standing areas for all ground crew members
- To outline the legal boundaries of the work property
Correct answer: To designate where cut pieces will fall and keep non-essential personnel clear
A drop zone designates the landing area for cut pieces and must be kept clear of all non-essential personnel to prevent struck-by injuries.
Question 3: What should ground workers do while a climber is making overhead cuts?
- Stand directly below to catch or redirect falling debris
- Position themselves in a safe zone outside the established drop zone (Correct answer)
- Hold the base of the tree to reduce vibration during cutting
- Continue chipping operations nearby to maintain work efficiency
Correct answer: Position themselves in a safe zone outside the established drop zone
Ground workers must position themselves outside the drop zone and never stand below a climber who is actively making cuts.
Question 4: What is a 'barber chair' in tree felling, and why is it considered extremely dangerous?
- A rest position used by climbers during long ascents
- When a tree splits vertically during felling, causing the butt to kick back violently (Correct answer)
- A rigging technique used for lowering large wood sections
- A tree disease that causes the bark to peel in strips
Correct answer: When a tree splits vertically during felling, causing the butt to kick back violently
A barber chair is a vertical split that occurs before the felling cut is complete, causing the trunk butt to kick back violently and the crown to fall unpredictably.
Question 5: What type of PPE is specifically designed to protect tree workers against chainsaw contact, including kickback?
- Safety glasses with side shields
- Chainsaw-resistant chaps or pants containing cut-resistant fiber material (Correct answer)
- A hard hat with face shield attachment
- A high-visibility vest with reflective striping
Correct answer: Chainsaw-resistant chaps or pants containing cut-resistant fiber material
Chainsaw chaps or cut-resistant pants contain fibrous material that jams the saw chain upon contact, stopping the chain before it penetrates deeply.
Question 6: What is the recommended escape route plan a feller must establish before beginning a felling operation?
- One escape route leading directly away from the back of the notch
- Two escape routes at approximately 45-degree angles from the back of the tree (Correct answer)
- Running parallel to the anticipated direction the tree will fall
- No specific escape route is needed if the landing zone is pre-cleared
Correct answer: Two escape routes at approximately 45-degree angles from the back of the tree
Two escape routes positioned at 45-degree angles from the back of the tree allow the feller to quickly move away from the falling tree and the kickback zone.
CTSP CTSP Struck-By and Falling Object Hazards 1
According to ANSI Z133, what is the minimum safe distance bystanders must maintain from tree removal operations?