CHST - Construction Health and Safety Technician Scaffolding and Elevated Work Platforms Questions and Answers Flashcards

What type of scaffold uses adjustable legs to compensate for uneven ground conditions?

Answer: Adjustable leg scaffold

Adjustable leg scaffolds are designed with variable-height legs to maintain a level working platform on uneven terrain.

Under OSHA regulations, who is authorized to move a mobile scaffold while a worker is on it?

Answer: No one — workers must dismount before moving

OSHA prohibits moving mobile scaffolds while workers are on them unless the floor is level, free of obstructions, and specific safety conditions are met per 1926.452(w).

What is the purpose of a toe board on a scaffold platform?

Answer: Prevent tools and materials from falling off the platform edge

Toe boards prevent materials, tools, and debris from being kicked or rolling off scaffold platforms onto workers below.

A scissor lift is classified under OSHA regulations as which type of equipment?

Answer: Both A and C

Scissor lifts are classified as both aerial work platforms (AWPs) under OSHA and mobile elevated work platforms (MEWPs) under ANSI A92 standards.

What is the minimum bearing capacity required for mudsills placed under scaffold base plates on soft soil?

Answer: Sufficient to support scaffold loads without settling

OSHA requires mudsills and base plates to be capable of supporting the scaffold without settling or displacement, with no specific numerical value mandated.

During scaffold erection, which workers are required to have fall protection?

Answer: All workers erecting or dismantling scaffolds above 6 feet when feasible

OSHA requires scaffold erectors and dismantlers to have fall protection when feasible, recognizing that guardrails may not yet be in place during the process.

What condition requires a scaffold to be immediately removed from service, regardless of other factors?

Answer: Any component is visibly bent, cracked, or structurally compromised

Scaffolds with visibly damaged or structurally compromised components must be taken out of service immediately until repaired or replaced.