What is the maximum amount of propane that may be dispensed into a container?

The correct answer is 80%. This is based on established safety standards for storing and handling propane. When filling containers, it's essential to leave a certain amount of space at the top to accommodate the expansion of the gas. Propane can expand significantly when heated, and if a container is filled to capacity, there could be a risk of pressure buildup, which can lead to dangerous situations.

By limiting the filling to 80%, it creates a buffer that allows for this expansion, enhancing safety during transport and use. This practice is in line with guidelines from organizations that regulate hazardous materials, and ensures that the containers can operate effectively without risking overpressure.