RV tanks are used to supply propane appliances; therefore, appliance pilots and electronic ignition systems must be turned off before beginning the filling operation.

• A. Turned on
• B. Set to pilot
• C. Inspected
• D. Turned off

Answer: (D)

The main safety idea is to eliminate all ignition sources during propane handling. Propane vapors can ignite if they encounter a flame or spark, and filling creates opportunities for leaks or vented gas. By turning off appliance pilots and electronic ignition systems, you remove potential flames or sparks right where the fuel is being transferred, greatly reducing the chance of ignition if a leak occurs.

Turning these devices on would introduce a flame or spark during the fill, which is dangerous. Leaving them set to pilot would keep a flame or ignition source active, defeating the safety purpose. Simply inspecting the system is important, but it doesn’t address the immediate risk of ignition during the filling process.