RMGA Cheat Sheet 2026

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

1. What class of plastic pipe is most commonly used for natural gas distribution in North America based on pressure rating? → PE 4710
2. What is the minimum clearance required above a gas range burner grate to combustible overhead cabinets under NFPA 54? → 30 inches
3. Why is it important to have regular maintenance of natural gas appliances? → To ensure efficient operation and safety
4. When should a gas utility worker eliminate ignition sources near a gas leak? → Immediately upon detecting or suspecting a gas leak
5. What is the purpose of the National Environmental Policy Act (NEPA) in the context of natural gas projects? → To require environmental impact assessments for major projects
6. What device is installed on a gas meter to measure the volume of gas passing through it? → Diaphragm meter (for residential), turbine or rotary meter (for commercial/industrial)
7. What technology allows utilities to detect gas leaks from a moving vehicle? → Mobile leak survey using laser-based methane analyzers mounted on a vehicle
8. Which federal agency is responsible for regulating interstate natural gas pipelines in the United States? → Federal Energy Regulatory Commission (FERC)
9. Microbiologically influenced corrosion (MIC) in gas pipelines is most commonly associated with which microorganism? → Sulfate-reducing bacteria (SRB) that thrive in oxygen-free (anaerobic) environments
10. What is the 'index' on a natural gas meter? → The register or display showing accumulated gas volume consumed
11. Which document must operators of gas pipelines maintain to record all maintenance and inspection activities? → Operations and Maintenance Manual
12. What is 'blowing down' a gas line in the context of emergency response? → Venting gas from a pipeline segment to atmosphere to allow safe repair work
13. What type of venting material is prohibited for natural gas appliance Category I venting applications? → PVC or CPVC plastic pipe
14. What is the correct minimum clearance required between a gas appliance and combustible materials? → As specified on the appliance listing label and installation instructions
15. What is the purpose of a pressure regulating station in a gas distribution system? → To reduce transmission pressure to distribution pressure
16. Per 49 CFR Part 192, how frequently must cathodic protection levels on gas distribution systems be monitored? → At least once each calendar year, not exceeding 15-month intervals
17. What type of corrosion occurs when two dissimilar metals are electrically connected in the presence of an electrolyte? → Galvanic corrosion
18. Under 49 CFR Part 192, what is the maximum time allowed for a gas operator to begin investigation of a Priority 1 (hazardous) leak report? → Immediately / as fast as possible (same day)
19. What does the term 'MAOP' stand for in pipeline operations? → Maximum Allowable Operating Pressure
20. What is the primary hazard associated with natural gas accumulation in an enclosed space? → Asphyxiation due to oxygen displacement and explosion risk
21. How often must operators perform patrols on transmission pipelines in Class 1 locations under 49 CFR Part 192? → At least once each calendar year
22. Which inspection method uses magnetic flux leakage to detect pipeline defects? → In-line inspection with an ILI tool
23. What should you do if you smell gas in your home? → Open windows and doors to ventilate
24. Which soil condition is generally considered most corrosive to buried steel gas pipelines? → Wet clay soil with low electrical resistivity, high moisture content, and poor drainage
25. What is the purpose of a 'pressure corrector' or 'temperature compensator' on a commercial gas meter? → To correct measured volume to standard conditions (14.73 psia, 60°F) for accurate billing
26. What is the first action a gas utility employee should take upon arriving at a reported gas leak inside a building? → Evacuate the building and call 911 before entering
27. What is the unit of measurement displayed on a residential natural gas meter in the United States? → Cubic feet (CCF or MCF)
28. Which tool is used to locate underground pipelines before excavation in the US? → 811 one-call system
29. What type of anode material is commonly used in impressed current cathodic protection systems? → Graphite or mixed metal oxide (MMO)
30. How is natural gas odorized before distribution to customers? → Mercaptan (ethyl mercaptan or similar) is injected into the gas stream