Roof Sailing Rigging and Line Systems 2 — Questions and Answers
Question 1: Which type of carabiner is required for use in fall protection systems according to ANSI/ASSE Z359 standards?
- Locking carabiner with a gate strength of at least 3,600 lbs (Correct answer)
- Non-locking carabiner rated for 2,000 lbs
- Any carabiner stamped with a load rating
- A snap hook without a keeper bar
Correct answer: Locking carabiner with a gate strength of at least 3,600 lbs
ANSI/ASSE Z359 requires locking carabiners with a gate strength of at least 3,600 lbs (16 kN) to prevent accidental opening during a fall.
Question 2: What does 'rope lay' refer to when evaluating a line for rigging use?
- The direction and tightness of the rope's twisted strands (Correct answer)
- The length of rope available for the job
- The rated breaking strength marked on the rope
- The color coding system used to identify rope diameter
Correct answer: The direction and tightness of the rope's twisted strands
Rope lay describes how the strands are twisted together (left-lay or right-lay) and how tightly, which affects handling, strength, and compatibility with hardware.
Question 3: A shock-absorbing lanyard is designed to limit the maximum arrest force on a worker to which value?
- 900 lbs (4 kN) (Correct answer)
- 2,000 lbs (9 kN)
- 1,500 lbs (6.7 kN)
- 500 lbs (2.2 kN)
Correct answer: 900 lbs (4 kN)
Shock-absorbing lanyards are designed to deploy and limit the maximum arrest force transmitted to the worker to 900 lbs (4 kN), protecting the body from injury during a fall arrest.
Question 4: When two ropes must be joined end-to-end for a rigging extension, which knot is the safest choice?
- Double fisherman's knot (Correct answer)
- Square knot
- Granny knot
- Half hitch
Correct answer: Double fisherman's knot
The double fisherman's knot (also called a grapevine bend) creates a very secure join between two ropes that tightens under load and is the standard for life-safety rope joining.
Question 5: What is the recommended maximum free-fall distance allowed before a fall arrest system activates, per OSHA 1926.502?
- 6 feet (Correct answer)
- 10 feet
- 4 feet
- 12 feet
Correct answer: 6 feet
OSHA 1926.502 limits free-fall distance to 6 feet for personal fall arrest systems to reduce the forces generated during arrest.
Question 6: A 'D-ring' on a full-body harness should be positioned where for use as the primary fall arrest attachment point?
- Center of the back, between the shoulder blades (Correct answer)
- On the chest, at sternum level
- On the hip, at the side
- On the shoulder, at the top
Correct answer: Center of the back, between the shoulder blades
The dorsal D-ring at center back between the shoulder blades is the designated fall arrest attachment point because it positions the worker upright during and after arrest.
Question 7: What is the minimum breaking strength required for a component in a personal fall arrest system under OSHA regulations?
- 5,000 lbs (Correct answer)
- 2,000 lbs
- 1,800 lbs
- 3,500 lbs
Correct answer: 5,000 lbs
All components of a personal fall arrest system, including hardware and connectors, must have a minimum breaking strength of 5,000 lbs per OSHA 1926.502.
Roof Sailing Rigging and Line Systems 2
Which type of carabiner is required for use in fall protection systems according to ANSI/ASSE Z359 standards?