OSHA 30 Hour Construction Program Practice Test

Why is it necessary for smoke to leave the blasted area before re-entering?

1. To assess structural integrity

2. To prevent inhalation hazards

3. To allow ventilation setup

4. To ensure everyone is accounted for

The correct answer is: To prevent inhalation hazards

The need for smoke to leave the blasted area before re-entering is primarily to prevent inhalation hazards. Inhalation of smoke and potentially toxic gases can pose severe health risks to individuals. Smoke can contain harmful particulate matter, toxic chemicals, and other irritants that can cause respiratory issues or other adverse effects. By waiting for the smoke to clear, workers reduce the risk of exposure to these dangerous substances, promoting a safer environment upon re-entry. While assessing structural integrity, setting up ventilation, and ensuring everyone is accounted for are important considerations in any emergency or hazard response situation, the immediate concern following a blasting operation is the health and safety of individuals regarding airborne contaminants. Thus, the priority is to ensure that hazardous smoke is removed before individuals return to the area.