G2 Gas Fitter Practice Exam

What is a safe method to determine the presence of a propane leak?

1. Using a lighter near suspected leak

2. Smelling for its distinctive odour

3. Looking for bubbles in water

4. Monitoring for a drop in temperature

The correct answer is: Smelling for its distinctive odour

Determining the presence of a propane leak requires safe and effective methods, and recognizing propane's distinctive odour is a widely accepted approach. Propane is typically mixed with an odorant, usually ethyl mercaptan, which gives it a strong, unpleasant smell resembling rotten eggs. This characteristic odour allows individuals to easily detect leaks through their sense of smell, making it a practical method for identifying potential hazards. While there are other methods to identify a leak, relying on smell is considered one of the most immediate and accessible ways for anyone in proximity to potentially dangerous gas. It is also important to note that if a propane leak is suspected, one should always follow safety protocols, which may include vacating the area and contacting professionals for assistance. Other methods, like looking for bubbles when a soapy water solution is applied to the suspected area, can be effective but require specific conditions and tools. Monitoring for temperature drops is not a reliable method for immediate detection of propane leaks as it may not clearly indicate the presence of gas. Using a lighter near a suspected leak is extremely hazardous and poses a significant risk of explosion or fire. Therefore, checking for the distinctive odour is the safest and most effective initial method to determine the presence of a propane leak.