What method is recommended for detecting a leak in a gas line?

• A. Using a digital pressure gauge
• B. Using a soapy solution
• C. Listening for hissing sounds
• D. Employing a gas leak detector

Answer: (B)

Using a soapy solution is recommended for detecting a leak in a gas line due to its effectiveness in identifying small leaks. When the soapy solution is applied to the area where a leak is suspected, the soap creates bubbles at the site of the leak. If there is a gas leak, the gas will escape through the opening, causing the liquid soap to bubble up, indicating the presence of gas. This method is simple, cost-effective, and can be done without specialized equipment, making it accessible for everyday use.

Other options, while they may have some utility, do not provide the same level of direct visual confirmation that a soapy solution does. A digital pressure gauge measures pressure changes but does not visually indicate a leak. Listening for hissing sounds can be useful, particularly in noisy environments where other sounds may mask the sound of escaping gas. However, it relies heavily on the user's ability to hear and discern the sound. Employing a gas leak detector is another advanced and reliable method, but it requires specific equipment that may not always be available for casual inspection. Thus, using a soapy solution remains the most straightforward and effective method for detecting leaks.