G2 Gas Fitter Practice Exam 2025 - Free Gas Fitter Practice Questions and Study Guide

Determining the presence of a propane leak safely is crucial for preventing potentially dangerous situations. The method of smelling for propane’s distinctive odour is effective because propane is typically mixed with an odorant called ethyl mercaptan, which gives it a strong, recognizable smell similar to rotten eggs. This olfactory cue allows individuals to detect leaks at much lower concentrations than would be harmful.

While this is a primary method used when assessing for leaks, it is important to remember to do so cautiously and in conjunction with other safety practices. Other methods like looking for bubbles in water are also effective but require the presence of water and may not be practical in all scenarios. Relying solely on temperature changes or using a lighter near a suspected leak presents significant safety hazards. The recommended approach is to first identify the presence of a leak using one of the non-hazardous methods and then take appropriate action to mitigate the risk.