OSHA 10-Hour Construction ReviewHealth Hazards in ConstructionMedium
A construction worker is performing tasks that involve grinding concrete in an enclosed space without local exhaust ventilation. What is the most significant health hazard associated with this activity, particularly over long-term exposure?
- ACarbon monoxide poisoning
- BSilicosis
- CLead poisoning
- DAsbestosis
Show answer & explanationAnswer & explanation
Correct answer: B. Silicosis
Grinding concrete generates respirable crystalline silica (RCS) dust. Long-term inhalation of RCS can lead to silicosis, a severe and irreversible lung disease, making it the most significant health hazard in this scenario.
Why the other options are wrong
- A. Carbon monoxide is produced by incomplete combustion, not grinding concrete.
- C. Lead exposure would be a concern if grinding lead-based paint, not typically raw concrete.
- D. Asbestosis is caused by inhaling asbestos fibers, not concrete dust.
Silicosis from Concrete Grinding
Grinding concrete releases respirable crystalline silica (RCS) dust, which upon long-term inhalation can cause silicosis, a debilitating and potentially fatal lung disease.
- Concrete contains silica.
- Grinding creates fine, respirable silica dust.
- Long-term exposure leads to silicosis.
Memory trick: Concrete dust, lungs rust!