AWS Certified Welding Inspector — FundamentalsSafetyMedium
A welding inspector is overseeing a Flux-Cored Arc Welding (FCAW) operation on galvanized steel in a poorly ventilated outdoor area. The welder complains of dizziness and nausea. What is the most likely cause of these symptoms?
- AInhalation of zinc fumes.
- BExposure to carbon monoxide.
- COverexposure to ozone.
- DNitrogen oxides poisoning.
Show answer & explanationAnswer & explanation
Correct answer: A. Inhalation of zinc fumes.
Welding galvanized steel releases zinc fumes, which can cause 'metal fume fever' with symptoms like dizziness and nausea, especially in poorly ventilated areas.
Why the other options are wrong
- B. Carbon monoxide is less common in FCAW and symptoms are different.
- C. Ozone is produced by arc welding but typically causes respiratory irritation, not primary dizziness/nausea.
- D. Nitrogen oxides are produced but usually cause respiratory distress rather than dizziness and nausea as primary symptoms.
Metal Fume Fever
Metal fume fever is a flu-like illness caused by inhaling fumes from certain metals, most commonly zinc, when welding or cutting galvanized materials.
- Caused by inhaling metal fumes (e.g., zinc, copper).
- Common when welding galvanized steel.
- Symptoms include fever, chills, nausea, headache, muscle aches.
Memory trick: Zinc Fumes Make You Feel Like You're Losing Your Zing!