New Mexico Pipe Fitter Journeyman (JPF) Practice Exam

Is it true or false that argon gas is lighter than air and does not cause respiratory problems in confined spaces?

1. True

2. False

3. Only in high concentrations

4. Depends on the ventilation

The correct answer is: False

Argon gas is indeed heavier than air, which makes the statement that it is lighter than air incorrect. This property is crucial to understanding the behavior of argon in enclosed spaces. Since argon is an inert gas, it does not react with other substances and does not support combustion. However, in confined spaces, the presence of argon can displace oxygen, which can lead to respiratory issues due to oxygen deficiency. High concentrations of argon can create an environment that is unsafe for breathing, even though the gas itself does not inherently cause respiratory problems. Proper ventilation is essential in any confined space where argon or other inert gases are being used, to mitigate the risk of asphyxiation from the displacement of breathable air. Therefore, stating that argon does not cause respiratory problems in confined spaces is misleading, as the lack of oxygen due to argon accumulation can pose significant health risks.