Chapter 16 Workbook Questions

Transcription

1 1. List four defects that might be found during rope inspection that would require a rope to be retired. a. b. c. d. cuts, excessive fraying, abrasions puffs, pulled or herniated fibers changes in diameter discoloration, glazing of the fibers

2 2. Before climbing a tree, a climber should inspect the tree for hazards such as a. b. c. d. e. broken limbs electrical hazards dead limbs decay splits

3 3. True / False The load on any piece of climbing or rigging equipment can be many times higher than the weight of the climber or the limb being rigged.

4 4. The tensile strength reported by the manufacturer is the breaking strength of a rope or piece of hardware.

5 5. Climbers may also choose to use a friction - saving device when tying in. This can reduce the wear on the rope and damage to the tree and can, in some cases, facilitate climbing.

6 6. A -_ figure 8 knot is often tied in the tail from the climbing hitch as a stopper knot to prevent the end from going through climbing hitch.

7 7. A hitch is a type of knot used to secure a rope around an object, another rope, or the standing part of the same rope. A bend joins two rope ends together.

8 8. Two methods of using a climbing line to ascend a tree are - body thrust and secured. footlock

9 9. True / False When footlocking, putting the hands on or above the Pruisk hitch could cause it to slide down the climbing line, creating a fall.

10 10. Because climbing spurs can damage a tree, they are approved for use only on trees to be removed, or for aerial rescues.

11 11. For added stability and safety, a climber should be secured with a - work positioning lanyard (or another line) in addition to the climbing line when using a chain saw in a tree.

12 12. True / False The most important factor in any aerial rescue situation is speed getting the victim to the ground in the shortest amount of time possible.

13 13. Rigging is the use of ropes and other equipment to take down trees or remove limbs.

14 14. - Double braid ropes are not recommended for natural-crotch rigging, where the friction of the cover with the tree causes an imbalance in the load taken by the core and cover braids.

15 14. The design factor of a rope is the tensile strength divided by the working-load limit.

16 16. Carabiners must always be loaded along their major axis, & never across the gate.

17 17. Arborist blocks are heavy-duty pulleys with a large, rotating sheave for the lowering line, and a smaller, fixed sheave to accept a rope sling. In contrast, rescue pulleys are designed for static, overhead rigging, where the loads are known and very low friction is required.

18 18. True / False Natural crotches can be fast and effective for use as a rigging point, but the consistent friction and versatility of placement of an arborist block is often a great advantage.

19 19. When the piece must be removed without dropping either the butt or tip, it can be tied so it is balanced, then lowered to the ground.

20 20. A technique in which a piece is tied above the point where it will be cut, and the line is run through a block or crotch below the cut is called butt hitching.

21 21. The drop cut is the classic three-point cut, which dates back to the early years of arboriculture.

22 22. The topping cut is a variation of standard tree-felling techniques that employs the use of a notch and back cut to form a hinge and steer the limb.

23 23. Label the following knots Blake s Hitch Bowline Image Credits: Sherrilltree.com

24 23. Label the following knots Image Credit: Sherrilltree.com Figure 8 Slip Knot

25 Chapter 16 Matching C bollard H scabbard E bight B Prusik loop G Blake s hitch A Rope sling F Access line D Body thrust A. May be used to attach a block B. Used for secure footlocking C. Used for taking wraps D. Climbing technique E. Curve or arc in a rope F. Second climbing line for emergency rescue G. Climbing hitch H. Sheath for a handsaw

26 23. Label the following knots Image Credit: Sherrilltree.com Figure 8 Slip Knot