Question

Atmospheres that contain a flammable component above ______ % of its Lower Explosive Limit are considered hazardous for confined space entry?

A) 5%
B) 10%
C) 20%
D) 30%

Answer 1

Atmospheres that contain a flammable component above 10% of its Lower Explosive Limit are considered hazardous for confined space entry.

Step-by-step explanation:

Atmospheres that contain a flammable component above 10% of its Lower Explosive Limit are considered hazardous for confined space entry.

For example, if the Lower Explosive Limit of a component in an atmosphere is 0.5%, any concentration above 0.05% (10% of 0.5%) would be considered hazardous.