Review Questions Safe Work Environment
Review Questions
- What PPE must be worn in a hazardous confined space where the entrance is from above?
- What must be done to a hazardous confined space where a toxic, flammable, or explosive atmosphere is detected?
- What type of soil(s) do not require sloping for the first 1.2 m in a trench?
- What are the sloping requirements for type 4 soils?
- If a trench is dug in type III soils and is 1 m wide at the bottom and 3 meters deep, how wide should the trench be at the top if it is sloped to prevent cave ins?
- If sloping is not practical, what can be used for protection against cave-ins?