How does exposure to liquefied petroleum gas affect the body?

• A. The gas burns skin
• B. The gas causes dehydration
• C. The gas displaces breathing air
• D. The gas acts as a stimulant

Answer: (C)

Exposure to liquefied petroleum gas mainly reduces the amount of breathable air by filling the environment with gas. LPG vapors are denser than air, so they tend to pool in low-lying and poorly ventilated areas, pushing oxygen out of the breathing zone. As the oxygen level drops, people can experience dizziness, confusion, fainting, and even unconsciousness, especially in confined spaces or where ventilation is limited.

This isn’t about skin burning, dehydration, or stimulation. While contact with liquid LPG can cause cold burns if it touches the skin, the primary danger from exposure is the displacement of oxygen. It also isn’t a stimulant; the gas can depress the body's ability to breathe because there’s less oxygen to use.