Millwright Level 1 Practice Exam

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Prepare for the Millwright Level 1 Exam with our comprehensive quiz. Engage with multiple choice questions designed to test your knowledge and skills relevant to the millwright trade. Achieve your certification with confidence!

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Is propane heavier or lighter than air?

Lighter
Heavier
Equal
Denser

The correct answer is: Heavier

Propane is classified as being heavier than air because its molecular weight is higher than that of air. Propane's density, at around 1.5 times that of air, means that in a situation where propane is released into the atmosphere, it will tend to accumulate in low-lying areas instead of dispersing upwards like lighter gases would. Understanding this property of propane is crucial, especially in safety considerations for storage and handling, as it poses risks of accumulation in confined spaces, which can lead to potential hazards such as explosions or asphyxiation. The other options do not accurately reflect the behavior of propane; for instance, being equal or lighter than air would suggest a different behavior in the environment.