G2 Gas Fitter Practice Exam

Where is mercaptan typically added to natural gas?

1. At the distribution center

2. In residential pipelines

3. At compressor stations

4. During production

The correct answer is: At compressor stations

Mercaptan is typically added to natural gas at compressor stations. This is an essential safety measure, as mercaptan has a distinct odor often described as resembling rotten eggs, which helps in detecting gas leaks. Adding it during the compression process ensures that the odorant is mixed effectively with the gas before it is distributed for use. Adding mercaptan at compressor stations allows for accurate and controlled dosing, which is crucial in maintaining safety standards throughout the distribution network. Once the gas leaves the compressor station, it travels through various pipelines and reaches consumers. If it were added at a different stage, such as the distribution center or in residential pipelines, it might not be as evenly mixed or could lead to inconsistencies in odor detection, which is critical for safety in the event of a leak. The answer emphasizes the importance of safety in gas distribution, aligning with industry practices and regulatory standards.