STSC Scaffolding Erection and Inspection 4

Question 1

When erecting a tubular welded frame scaffold, at what height must the first set of cross braces be installed?

Accepted Answer

At the base of the first frame section before adding additional frames

Answer

Cross braces must be installed at the base of the first frame section to provide lateral stability before additional frames are stacked.

Question 2

What is the minimum wire gauge for wire used to secure scaffold planks in place?

Accepted Answer

14 gauge

Answer

OSHA requires a minimum of 14-gauge wire when wire is used to secure scaffold planking.

Question 3

A scaffold is being used near overhead power lines. According to OSHA 1926.502, what is the minimum safe distance from uninsulated power lines carrying up to 50 kV?

Accepted Answer

10 feet

Answer

OSHA requires scaffolds to be erected at least 10 feet away from uninsulated power lines rated up to 50 kV.

Question 4

Which condition makes a scaffold plank unfit for use?

Accepted Answer

Split ends extending more than the plank's thickness

Answer

Split ends that extend beyond the plank's thickness compromise structural integrity and the plank must be removed from service.

Question 5

During a scaffold inspection after a storm, you notice one upright has settled approximately 1 inch into soft soil. What is the correct action?

Accepted Answer

Remove all workers immediately and re-level and re-plumb before resuming work

Answer

Any settlement that causes the scaffold to go out of plumb requires immediate evacuation and correction before work resumes.

(STSC) Safety Trained Supervisor Construction Practice Test

(STSC) Safety Trained Supervisor Construction Practice Test

STSC Scaffolding Erection and Inspection 4