Safety & Hazards
Equipment or clothing designed to prevent or reduce injuries.
What is personal protective equipment (PPE)?
This height triggers the "six-foot rule" for an unprotected work surface.
What is 6 feet?
This many points of contact should be maintained while climbing a ladder.
What is three-point contact?
This PPE protects your head from falling objects.
What is an approved hard hat?
This support system is designed to prevent a trench or excavation cave-in.
What is shoring?
Procrastination, carelessness, and horseplay fall into this category of incident causes.
What are at-risk work habits?
This is the required approximate height of the top rail of a guardrail.
What is 42 inches ±3 inches?
This scaffold tag color means Unsafe — Do Not Use.
What is a red tag?
Workers should maintain this with an equipment operator to make sure the operator sees them.
What is eye contact?
Material removed while digging a trench or excavation is called this.
What is spoil?
This document provides information about a hazardous substance, including hazards, safe handling and first aid.
What is a Safety Data Sheet (SDS)?
This component of a personal fall arrest system connects a worker's harness to an anchor point.
What is a lanyard?
A straight ladder should be positioned using this ratio between vertical height and horizontal distance.
What is the 4-to-1 ratio?
These three types of PPE are identified for protection when flying objects are a threat.
What are hard hat, eye protection and face protection?
This person has authority to identify hazards and take prompt corrective measures to eliminate them.
Who is a competent person?
A worker removes a hard hat because it is hot and no one appears to be working overhead. NCCER describes this behavior as this type of risk-taking.
What is rationalizing risk?
An anchor point generally must have at least this many pounds of breaking or tensile strength.
What is 5,000 pounds?
An extension ladder is 30 feet long. This is the minimum required overlap between its sections.
What is 3 feet?
This person should direct a vehicle when the driver's vision is blocked.
Who is a signaler?
Before removing a machine guard for service, the machine should be turned off and placed in this condition.
What is tagged out?
Before beginning a job, workers identify potential hazards and safeguards needed for the task. NCCER calls this TSA, which stands for this.
What is Task Safety Analysis?
A floor opening is covered, but workers have placed building materials on top of the cover. Explain the safety problem.
Materials/equipment should never be stored on a hole cover.
A scaffold is being used 7 feet from a 480-volt power line. Explain the violation and the required minimum distance.
It is too close. Above 300 volts, the scaffold must remain at least 10 feet from the power line.
A gasoline-powered machine is operating inside a poorly ventilated building. Identify the invisible hazard created by its exhaust.
What is carbon monoxide?
A worker stands between two pieces of heavy equipment that have not been secured. Identify the primary type of hazard.
What is a caught-in/caught-between hazard?