FDNY CoF G-22 Practice Test 2025 – Prepare for LPG and CNG Engine Fuel System Exam

The ideal placement for CNG fuel storage is outdoors and away from people and openings. This recommendation is based on safety considerations. CNG, or compressed natural gas, is lighter than air and, in the case of a leak, will disperse quickly into the atmosphere if stored outdoors. This reduces the risk of accumulation and potential fire hazards, which can occur if gas builds up in enclosed spaces.

By placing CNG storage away from people and building openings, the risks associated with gas leakage are minimized, ensuring that any accidental release does not endanger individuals or result in gas entering buildings. The outdoor location also takes advantage of natural ventilation, which further aids in the dispersal of any gas if a leak occurs.

Other suggested placements, such as indoors near heating systems or in easily accessible garages, introduce unnecessary safety risks by placing the storage in close proximity to potential ignition sources and confined spaces, where gas could accumulate and pose a significant hazard.