Question

What kind of warning signs should be placed on manholes into void spaces?


Warning signs that indicate lack of oxygen inside


Danger of explosion signs


Breathing apparatus mandatory sign


No smoking signs


I don't know

Answer 1

Warning signs that indicate the lack of oxygen inside should be prioritized for manholes leading into void spaces. Additionally, danger of explosion signs can be helpful to warn individuals about possible hazards. It is also advisable to have signs indicating the mandatory use of breathing apparatus. To prevent any accidents or incidents, no smoking signs should be placed as well.