G2 Gas Fitter Practice Exam

Which of the following is an indication of a gas leak?

1. Increased ventilation

2. Presence of a rotten egg smell

3. Warm surfaces on piping

4. High gas pressure readings

The correct answer is: Presence of a rotten egg smell

The presence of a rotten egg smell is a strong indication of a gas leak. Natural gas is odorless, so an odorant called mercaptan is added to help detect leaks. This compound gives off a distinctive smell reminiscent of rotten eggs, making it easier for individuals to notice when gas is leaking. Awareness of this smell is crucial for maintaining safety and responding promptly to potential gas leaks, as they can lead to harmful situations such as explosions or asphyxiation if not addressed quickly. Increased ventilation may be a safety measure taken in response to suspected gas leaks, rather than an indication of a leak itself. Warm surfaces on piping can also occur for various reasons, including normal heat transfer from the gas or malfunctioning equipment, and do not specifically indicate a gas leak. High gas pressure readings may suggest that the system is operating at elevated levels, but does not inherently point to a gas leak; it could indicate that the system is functioning under high demand or pressure despite being safe.