MCC-NH Gas Fitters Practice Exam

What is not recommended to locate a leak during testing?

1. Using a bubble solution

2. Using flame or lighter

3. Using a gas detector

4. Using audible alarms

The correct answer is: Using flame or lighter

Using flame or lighter to locate a leak is not recommended due to the inherent dangers associated with ignition sources in the presence of flammable gases. When testing for gas leaks, safety is paramount, and using a flame can lead to catastrophic outcomes, such as an explosion or fire, if a gas leak is present. In contrast, other methods like using bubble solutions, gas detectors, or audible alarms provide safe, non-intrusive ways to identify gas leaks. Bubble solutions create visible bubbles where gas is escaping, indicating the presence of a leak without risk of ignition. Gas detectors are designed to sense the presence of combustible gases and provide a safe and effective means of leak detection. Audible alarms serve as an additional safety measure by alerting individuals to the presence of gas, allowing for prompt action without the dangers posed by open flames.