Free Certified Arborist Safe Work Practices Questions and Answers 1 — Questions and Answers
Question 1: How far away from a tree that is being felled should an uninvolved worker stand?
- 20 feet or more
- 10 feet or more
- One tree length or more
- Two tree lengths minimum (Correct answer)
Correct answer: Two tree lengths minimum
Safety regulations for tree felling mandate a significant safety zone to protect workers from falling trees or debris. The minimum safe distance for uninvolved workers is typically at least two tree lengths away from the tree being felled. This provides ample space to avoid injury if the tree falls unexpectedly or if branches kick back.
Question 2: While hoisting a heavy object, where should the arborist stand?
- As near to the object as possible (Correct answer)
- As far to the object as possible
- At least 5 feet away from the object
- Just above the object
Correct answer: As near to the object as possible
When hoisting a heavy object, the arborist should stand as near to the object as possible, but out of the direct line of fire if it were to swing or drop. This proximity allows for better control, observation of the load, and clear communication with other crew members. Standing too far away reduces control and visibility, increasing risk.
Question 3: What does it mean when a tree is referred to as a "barber chair"?
- Guy wires must be used to support trees.
- A tree splits from the back cut upward. (Correct answer)
- It is possible to fell a tree without using wedges.
- A tree has been repeatedly topped.
Correct answer: A tree splits from the back cut upward.
A 'barber chair' is a dangerous felling hazard where a tree splits vertically up the trunk from the back cut, often due to excessive lean or internal stresses, before the hinge wood can properly guide the fall. This causes the butt end of the tree to kick back violently and unpredictably. It poses an extreme risk to the feller and is a critical safety concern in arboriculture.
Question 4: If a chainsaw operator loses control of the tree while felling it, which way should he go?
- Following the fall's intended direction
- In a path that is perpendicular to the desired fall direction
- In a direction perpendicular to the planned fall path
- 45 degrees in the opposite direction of the intended fall to either side of a line (Correct answer)
Correct answer: 45 degrees in the opposite direction of the intended fall to either side of a line
When felling a tree, the safest escape route is 45 degrees away from the intended fall direction, to either side of the line. This path moves the operator away from the butt of the tree, which can kick back, and also provides a clear line of sight to the falling tree. It minimizes the risk of being struck by the trunk or large branches.
Question 5: What is the term used for the upper part of the guide bar tip on a chainsaw?
- The safety segment
- The kickback quadrant (Correct answer)
- The applicator tip
- The patrol section
Correct answer: The kickback quadrant
The kickback quadrant is the specific area on the upper part of the chainsaw guide bar tip where rotational kickback is most likely to occur. Contacting an object with this part of the chain can cause the saw to violently thrust backward and upward towards the operator. Understanding and avoiding contact with this quadrant is crucial for chainsaw safety.
Question 6: When limbing or bucking a tree, which side of the tree should workers stand on?
- Uphill from the tree (Correct answer)
- Downhill from the tree
- The left side of the tree
- The right side of the tree
Correct answer: Uphill from the tree
When limbing or bucking a tree, workers should always stand uphill from the tree. This position ensures safety by preventing logs or branches from rolling or sliding downhill towards the worker due to gravity. Standing uphill keeps the worker out of the path of potential movement and reduces the risk of being struck or pinned.
Question 7: When lifting something heavy off the ground, how should the back be positioned?
- The back should be kept in a straight position.
- It is important to have a bent back.
- Twisting the back is necessary.
- The back should be kept in a normal, comfortable position. (Correct answer)
Correct answer: The back should be kept in a normal, comfortable position.
When lifting heavy objects, the back should be kept in a normal, comfortable position, often with a slight natural curve. The emphasis should be on lifting with the strong leg muscles, not the back. Maintaining a natural spinal alignment prevents undue strain and reduces the risk of back injury, which can occur with a rigidly straight or excessively bent back.
Question 8: How does a rope's tensile strength compare to its working-load limit?
- The tensile strength is less than the working-load limit.
- The tensile strength is greater than the working-load limit. (Correct answer)
- The tensile strength has no bearing on the working-load limit.
- The tensile strength and working-load limit are the same.
Correct answer: The tensile strength is greater than the working-load limit.
Tensile strength is the maximum load a rope can withstand before breaking, representing its ultimate breaking point. The working-load limit (WLL) is a much lower value, typically a fraction of the tensile strength, that represents the maximum load a rope can safely support during regular use. This safety factor accounts for variables like knots, wear, and dynamic loads to prevent failure.
Question 9: Which knot is most frequently used to send equipment up to a climber?
- Midline clove hitch (Correct answer)
- End-line clove hitch
- Running bowline
- Figure-eight knot
Correct answer: Midline clove hitch
The midline clove hitch is frequently used to send equipment up to a climber because it can be tied anywhere along the rope, not just at the end. This allows for efficient attachment of tools or gear at any point on the rigging line. It creates a secure, adjustable loop that holds the equipment firmly without slipping.
Question 10: What is not recommended for starting a chainsaw?
- Drop starting (Correct answer)
- On the ground
- Leglock method
- All of the above.
Correct answer: Drop starting
Drop starting a chainsaw is highly dangerous and not recommended. This method involves holding the saw in one hand and dropping it while pulling the starter cord with the other, offering no control over the saw. It significantly increases the risk of losing grip, being struck by the running chain, or causing serious injury. Chainsaws should always be started on the ground or using the leglock method for stability.
Question 11: What is the minimum diameter for tying a main branch?
- 3 inches
- 5 inches
- 7 inches
- 4 inches (Correct answer)
Correct answer: 4 inches
For tying a main branch in a cabling system, a minimum diameter of 4 inches is generally recommended. Branches smaller than this may not possess sufficient structural integrity to effectively support the cabling hardware or withstand the forces exerted upon them. Using appropriate branch sizes ensures the effectiveness and safety of the cabling system.
Free Certified Arborist Safe Work Practices Questions and Answers 1
How far away from a tree that is being felled should an uninvolved worker stand?