Scaffolds and Aerial Lifts

A scaffold may be either rigidly support or suspended from ropes or cables.

• true
• false

____________ and aerial platforms provide workers with greater working or walking area and stability than working on ladders.

• Toeboards
• Walkways
• Scaffolds
• Hoists

In order to prevent collapse due to overloading, scaffolds are designed to carry times their maximum intended load.

• 2.5
• 3
• 3.3
• 4

For plastering and lathing, the horizontal distance requiring guardrails is increased from _____ to 18˝.

• 11˝
• 12"
• 14"
• 15"

A guardrail system must be in place if the scaffold is at or above 10´-0˝ before workers are allowed to work from the platform.

• true
• false

Cross bracing may serve as a midrail if the crossing point is between 20˝ and __________________˝ above the work platform.

• 30
• 40
• 50
• 60

Unlike wooden ladders, wooden scaffolding planks may be painted.

• true
• false

Which of the following is not a true statement?

• Platforms must be fully decked with gaps no greater than 1˝.
• Platforms must not deflect more than 1/60 of the span when loaded.
• Wooden planks must be scaffold-grade.
• None of the above.

Because walkways are used only for access to and from the scaffold and are not used as a work level, guardrails are not required.

• true
• false

When scaffolding is more than four times taller than the minimum base dimension, it must be restrained from tipping by tying, guying, or bracing; also, __________________ can be used to enlarge the base.

• walkway
• platform
• scaffold
• outriggers