CSS Fall Protection and Scaffolding 3 — Questions and Answers
Question 1: What is the maximum load that a scaffold must be capable of supporting, expressed as a multiple of the maximum intended load?
- 2 times
- 3 times
- 4 times (Correct answer)
- 5 times
Correct answer: 4 times
OSHA 29 CFR 1926.451(a)(1) requires scaffolds to support their own weight plus at least 4 times the maximum intended load.
Question 2: Under OSHA standards, when is a guardrail system alone NOT sufficient fall protection on a scaffold?
- When working above 10 feet
- When the scaffold is on a slope
- When using a two-point suspension scaffold
- When working on a single-point adjustable scaffold (Correct answer)
Correct answer: When working on a single-point adjustable scaffold
Single-point adjustable suspension scaffolds require both a guardrail system and a personal fall arrest system due to greater instability risk.
Question 3: A CSS is reviewing a fall protection plan that relies on a controlled access zone (CAZ) instead of guardrails for leading edge work. What is the maximum CAZ width measured from the leading edge?
- 15 feet
- 25 feet
- 30 feet (Correct answer)
- 45 feet
Correct answer: 30 feet
OSHA 29 CFR 1926.502(g) limits controlled access zones to a maximum width of 30 feet from the leading edge.
Question 4: Which of the following is NOT an accepted method of fall protection for workers on low-slope roofs (slope ≤ 4:12) under OSHA construction standards?
- Warning line system combined with safety monitoring system
- Personal fall arrest system
- Guardrail system
- Warning line system alone without any other protection (Correct answer)
Correct answer: Warning line system alone without any other protection
A warning line system alone does not meet OSHA requirements; it must be combined with a safety monitoring system, PFAS, or guardrail on low-slope roofs.
Question 5: What is the minimum height of a toeboard required on a scaffold platform under OSHA standards?
- 2 inches
- 3.5 inches
- 4 inches (Correct answer)
- 6 inches
Correct answer: 4 inches
OSHA 29 CFR 1926.451(h)(1) requires toeboards on scaffolds to be at least 3½ inches high — commonly noted as 4 inches in many training contexts, but the standard specifies 3½ inches minimum.
Question 6: A worker falls while wearing a full-body harness and self-retracting lanyard. After rescue, what must happen to the equipment?
- It can be reused if it appears undamaged
- It must be inspected by the manufacturer before reuse
- It must be immediately removed from service and destroyed or returned to the manufacturer (Correct answer)
- It only needs a visual inspection by the competent person
Correct answer: It must be immediately removed from service and destroyed or returned to the manufacturer
OSHA requires fall arrest equipment involved in a fall to be removed from service immediately, as internal damage may not be visible.
Question 7: What is the minimum breaking strength required for cross braces used as guardrails on supported scaffolds when no other top rail is present?
- 100 lbs applied downward
- 150 lbs outward and 150 lbs downward
- 200 lbs applied in any direction (Correct answer)
- 250 lbs outward and 250 lbs downward
Correct answer: 200 lbs applied in any direction
Under OSHA 29 CFR 1926.451(g)(4), guardrail systems on scaffolds must withstand a force of at least 200 lbs applied in any outward or downward direction.
CSS Fall Protection and Scaffolding 3
What is the maximum load that a scaffold must be capable of supporting, expressed as a multiple of the maximum intended load?