16. CLIMBING AND WORKING IN TREES WORKBOOK Flashcards
__________ used for climbing must be self-closing and self-double locking (triple-action).
Carabiners
True/False – Hitch cord is typically a smaller-diameter cordage used to tie the friction hitch.
True
__________ are small, light-duty pulleys, often used to tend slack and assist advancement of the friction hitch.
Micro pulleys
Climbers may choose to use a __________ device when tying in. This can reduce the wear on the rope.
Friction-saving
True/False – Climbing spikes are used for ascending trees, but only for removal or during a rescue.
True
List three times that climbing gear should be inspected.
- DAILY
- Periodic
- Post-incident
List two braided rope types that are popular for tree climbing.
- 16-strand
- 24-strand
__________ ropes are not recommended for natural branch union rigging.
Double-braid
True/False – If the load in a rope equals its tensile strength, the rope will definitely fail on its first use.
False
True/False – In SRS, there is a 2:1 mechanical advantage, but only 50% gain in upward movement.
False
True/False – When a climber is injured or unresponsive in a tree, the first step is to ascend and reach them quickly.
False
True/False – Natural branch unions are fast and effective for rigging points but the minimal, consistent friction and versatility of an arborist block is often a great advantage.
True
True/False – The forces in rigging are affected by weight, fall distance, rope amount, and angles.
True
True/False – It is always preferable to establish a rigging point above the work if possible.
True
True/False – Rigging from below is one of the most demanding techniques due to shock-loading.
True
What is the weakest link in a rigging system?
The rigging line
What must arborists abide by when working near electrical conductors?
Minimum approach distance
List two types of climbing systems.
- Moving rope system (MRS)
- Stationary rope system (SRS)
Carabiners must always be loaded along the:
Major axis
A system that incorporates ascenders for efficient ascent:
Rope walking
A change in the climbing line’s direction to improve safety and efficiency:
Redirect
How should a piece be tied before lowering to prevent dropping the butt or tip?
Balanced
A variation of standard tree-felling using a notch and back cut:
Hinge cut
Identify these knots: Blake’s hitch, Sheet bend, Running bowline.
Blake’s hitch, Sheet bend, Running bowline
List three essential climbing equipment.
- Carabiners
- Micro pulleys
- Friction-saving device
How often should climbing gear be inspected?
- Daily
- Periodically
- Post-incident
List two braided rope types popular for tree climbing.
- 16-strand
- 24-strand
Why are double-braid ropes not recommended for natural branch union rigging?
Friction imbalance between the core and cover braids
A ‘rope inside a rope’ is known as:
Double-braid rope
A short length of cordage used for tying a climbing hitch:
Split-tail
First steps in an emergency response:
Assess the situation and call for help
A cut with an undercut, top cut, and final cut:
Drop cut
What is the minimum required tensile strength in the United States for carabiners?
5000 lbs
Type of knot used to secure a rope to an object, another rope, or the standing part of the same rope.
Hitch
Joins the ends of two ropes, or both ends of the same rope together.
Bend
Tied to itself, utilizing only one rope.
Knot
Considered the “climbing knots” used by many climbers. They allow the climber to ascend or descend on a climbing rope.
Climbing Hitch (friction hitch)
Prussik, Tautline Hitch, Blakes Hitch etc
As reported by the manufacturer, this value is the breaking strength of a new rope or piece of hardware.
Tensile Strength
One cycle means one lift OR drop for a rigging line.
Cycles to failure
If the load in a rope is equal to its tensile strength, what can happen?
The rope may fail.
This value is created to increase the life of a rope and is much less than the tensile strength (breaking point).
Working-load limit
A design factor of ___ is commonly used for life-support ropes, lanyards, and hitch cords.
10
The first step in any emergency response is to assess the situation using the ABC’S
Airway
Breathing
Circulation
When working in trees, the ANSI _____ standard outlines safety requirements for arboricultural operations, including PPE like helmets, eye protection, and climbing equipment, and emphasizes safe climbing practices and tree inspection.
Z133
Because the rope moves as the climber moves in ____, the climber advances only 1ft for every 2ft of rope pulled.
Moving Rope Systems (MRS)
As the climber ascends using ____ climbing, advancing the gear 1ft up the rope translates into 1ft of upward movement for the climber.
Stationary Rope Systems (SRS)
In MRS, there is 2:1 mechanical advantage; however, that corresponds to only ____% gain in UPWARD MOVEMENT
50%
