Propane Certification Cheat Sheet 2026

The 30 highest-yield Propane Certification facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. What is the first step when connecting a propane tank to an appliance? → Ensure all appliance controls are off
2. Propane storage areas must be kept free of which of the following to reduce fire and explosion risk? → Combustible materials, flammable liquids, and sources of ignition
3. In what direction must the discharge outlet of a propane container's pressure relief valve (PRV) be directed? → Away from the container and toward an open area, not toward personnel or ignition sources
4. Which NFPA standard specifically addresses propane-fueled vehicles and vehicle fueling systems? → NFPA 58
5. When storing propane tanks, which of the following is NOT safe? → Storing tanks near heat sources
6. Propane containers must be positioned so that the pressure relief valve is in contact with which phase of propane? → Vapor phase
7. Which type of fire extinguisher is recommended for most propane-related fires? → Dry chemical (BC or ABC rated)
8. If a propane tank is on fire and cannot be extinguished, the safest firefighting strategy is to: → Cool the container with water while withdrawing to a safe distance
9. What is the maximum fill level allowed for propane containers, expressed as a percentage of water capacity? → 80%
10. What material is commonly used for propane tank construction? → Carbon steel
11. Which code edition does NFPA 58 typically adopt on a cycle that aligns with which revision schedule? → Every 3 years
12. What is the correct action when a propane odor is detected inside a structure? → Leave immediately without operating any electrical switches
13. Which type of valve protection is required on propane cylinders that are not connected to an appliance or manifold? → A protective cap or plug over the valve outlet
14. State propane regulations are typically administered by which type of state agency? → State fire marshal or public utilities commission
15. How must DOT propane cylinders be positioned when in active use? → Upright with the valve end up
16. How is liquid propane converted to a usable gas form for appliances? → Through a vaporizer
17. What is the appropriate response to a propane leak? → Turn off the appliance and leave the area and Use soapy water to locate the leak
18. How should propane cylinders be secured to prevent tipping or falling during storage? → Chained, strapped, or otherwise restrained in an upright position
19. Propane liquid contact with skin can cause which type of injury? → Cryogenic (freeze) burns
20. How should you check for propane leaks at connections? → Apply a soap and water solution
21. During a propane emergency, which emergency notification should be made if the release cannot be controlled? → Call 911 and the National Response Center (1-800-424-8802)
22. Under NFPA 58, what is the minimum separation distance between a propane container of 500 gallons (water capacity) and a building? → 10 feet
23. What does the distinctive odor added to propane resemble? → Rotten eggs
24. What is the lower explosive limit (LEL) of propane in air, below which ignition cannot occur? → 2.1%
25. What type of valve is used to manually shut off propane flow from the tank? → Service valve
26. When is it acceptable to use an open flame to check for a propane leak? → Never — always use an approved leak detection solution or electronic detector
27. After a propane leak has been stopped and the area ventilated, what must be done before re-lighting any appliances? → A leak test must be performed on the entire system
28. What safety device is installed on propane tanks to release excess pressure? → Relief valve
29. What is the first step when installing a propane system? → Conducting a site evaluation
30. Which component regulates the pressure of propane delivered to appliances? → Regulator