NSC Fall Protection 4

Question 1

What is the minimum D-ring breaking strength required for a full-body harness used in a personal fall arrest system?

Accepted Answer

5,000 lbs

Answer

OSHA requires all PFAS hardware, including D-rings, to have a minimum breaking strength of 5,000 pounds.

Question 2

Which roofing work scenario requires fall protection under OSHA's low-slope roof rules when the roof is less than 4:12 pitch?

Accepted Answer

Any work anywhere on the roof

Answer

On low-slope roofs, OSHA requires fall protection (guardrails, safety nets, or PFAS) for any work anywhere on the roof surface, not just near edges.

Question 3

A self-retracting lifeline (SRL) differs from a standard lanyard primarily because it:

Accepted Answer

Automatically takes up slack and limits free fall

Answer

An SRL continuously retracts to remove slack and, upon sensing a sudden increase in speed, locks and limits free fall to inches rather than feet.

Question 4

Under OSHA construction standards, what is the maximum height of the toe board required at open-sided floors and platforms?

Accepted Answer

4 inches

Answer

OSHA requires toe boards to be at least 3.5 inches tall, but the standard commonly referenced minimum is 4 inches to prevent tools and materials from rolling off edges.

Question 5

Which condition would make a portable ladder unsafe for use according to OSHA and NSC guidelines?

Accepted Answer

Rungs or steps are missing or cracked

Answer

Missing, cracked, or otherwise damaged rungs or steps create immediate fall hazards and disqualify a ladder from service until repaired or replaced.

NSC Practice Test

NSC Practice Test

NSC Fall Protection 4