When an LPG cylinder is involved in a fire, how many feet must the area be evacuated in all directions?

When dealing with a fire involving an LPG (liquefied petroleum gas) cylinder, evacuating a 150-foot radius around the cylinder is essential for safety. This distance is recommended due to the potential hazards that LPG cylinders present when exposed to fire.

LPG is flammable and produces volatile vapors that can lead to fire and explosion if ignited. The 150-foot evacuation zone helps to ensure that individuals are far enough away from the heat and potential blast radius, as well as any flying debris that could result from a cylinder rupture or explosion. This precaution minimizes the risk to bystanders and emergency responders alike.

Other evacuation distances provided in the options may not adequately account for the potential dangers associated with LPG fires, which is why the 150-foot guideline is considered the safe standard for evacuation in these scenarios.