Roof Sailing Roof Sailing MCQ 3 — Questions and Answers
Question 1: Which knot is most commonly recommended for securing a safety rope to an anchor during roof sailing operations?
- Slip knot
- Bowline knot (Correct answer)
- Square knot
- Half hitch only
Correct answer: Bowline knot
The bowline knot creates a secure, non-slipping loop that is easy to untie after loading, making it the preferred choice for life-safety rope anchoring.
Question 2: A roofer notices that the existing decking has soft spots. What is the safest course of action?
- Work around the soft spots carefully
- Stop work and replace the damaged decking before proceeding (Correct answer)
- Nail extra shingles over the soft area
- Add roofing cement to firm up the spot
Correct answer: Stop work and replace the damaged decking before proceeding
Soft spots indicate rotted or structurally compromised decking, which poses a fall-through risk and must be replaced before any work continues.
Question 3: When is a personal fall arrest system (PFAS) required on a residential roof?
- Only when the pitch exceeds 12:12
- Whenever a worker is at a height of 6 feet or more above a lower level (Correct answer)
- Only on commercial jobs
- When the homeowner requests it
Correct answer: Whenever a worker is at a height of 6 feet or more above a lower level
OSHA 1926.502 mandates a PFAS or other fall protection when any worker is exposed to a fall of 6 feet or more on a residential construction site.
Question 4: What is the maximum free-fall distance allowed by OSHA when using a personal fall arrest system?
- 2 feet
- 6 feet (Correct answer)
- 10 feet
- 15 feet
Correct answer: 6 feet
OSHA requires that a PFAS limit free-fall to no more than 6 feet and arrest a fall before the worker contacts a lower level.
Question 5: Which roofing material requires the steepest minimum pitch to prevent water infiltration?
- Metal standing-seam panels
- 3-tab asphalt shingles
- Built-up roofing (BUR)
- Wood shingles (Correct answer)
Correct answer: Wood shingles
Wood shingles typically require a minimum pitch of 3:12 to 4:12 because they rely on rapid water runoff and do not seal as tightly as other materials.
Question 6: What tool is used to measure the exact pitch of a roof on-site without climbing?
- Spirit level and tape measure
- Digital angle finder (inclinometer) (Correct answer)
- Plumb bob
- Speed square held horizontally at the eave
Correct answer: Digital angle finder (inclinometer)
A digital angle finder or inclinometer can be held against the rake edge to give an immediate, accurate reading of the roof's slope angle.
Question 7: During roof sailing, what is the correct action if a coworker's fall arrest system deploys?
- Tell them to climb back up unassisted
- Call 911 and initiate the site's rescue plan immediately (Correct answer)
- Cut the lanyard to free them quickly
- Wait 15 minutes before acting
Correct answer: Call 911 and initiate the site's rescue plan immediately
A suspended worker can experience suspension trauma within minutes; calling 911 and activating the site rescue plan ensures prompt professional rescue.
Roof Sailing Roof Sailing MCQ 3
Which knot is most commonly recommended for securing a safety rope to an anchor during roof sailing operations?