Ohio Scaffolding Installer Practice Exam

Ohio Scaffolding Installer Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2025|2026 Q&A | Instant Download Pdf

• What is the primary purpose of scaffolding on a jobsite?
• To decorate the construction project
• To provide access and a working platform
• To offer temporary elevated work support
• To support permanent building walls

Rationale: Scaffolding is a temporary structure used to support

workers and materials at height.

• Who is responsible for approving any scaffold modifications on site?
• Any experienced worker
• The site supervisor
• A competent person
• The crane operator 1 / 3

Rationale: OSHA requires scaffold decisions to be made by a

“competent person” trained to identify hazards.

• What is the minimum platform width for most scaffolds?
• 8 inches
• 14 inches
• 18 inches
• 24 inches

Rationale: Platforms generally must be at least 18 inches wide to

allow safe movement.

• When must guardrails be installed on scaffolding platforms?
• At any height
• Only above 20 feet
• When the platform is 10 feet or higher
• Only when workers request

Rationale: Fall protection is required at heights of 10 feet or greater

for scaffolds.

5. The top guardrail height must be approximately:

• 24 inches
• 30 inches
• 38–45 inches
• 60 inches

Rationale: OSHA requires top rails between 38–45 inches. 2 / 3

• What is the minimum overlap required for scaffold planks when they

are not secured?

• 1 inch
• 3 inches
• 6 inches to 12 inches
• 24 inches

Rationale: Scaffold planks must overlap 6–12 inches to prevent

sliding.

7. The maximum gap between scaffold planks shall not exceed:

• 3 inches
• 1 inch
• 6 inches
• No limit

Rationale: Gaps over 1 inch create trip and fall hazards.

• How much weight must scaffold components be capable of

supporting?

• Their own weight only
• One worker at a time
• Four times the maximum intended load
• Twice the maximum intended load

Rationale: OSHA requires a 4:1 safety factor.

• Which of the following is the most stable base support for scaffolding?
• Pile of bricks
• / 3