Recreational Vehicle (RV) Technician Practice Test

Which substances are prohibited in liquid leak detectors?

1. Water and alcohol

2. Ammonia and chlorine

3. Acetone and bleach

4. Hydrogen and nitrogen

The correct answer is: Ammonia and chlorine

The correct answer identifies ammonia and chlorine as substances prohibited in liquid leak detectors due to their potential to create hazardous reactions when used in certain environments. Both ammonia and chlorine are classified as irritating and harmful substances that can pose significant risks to health and safety. Ammonia can cause respiratory issues, and chlorine can produce toxic gas and further react with other chemicals, potentially leading to dangerous situations in confined spaces typical of RV systems. In context, while water and alcohol are commonly used as solvents and may not inherently be harmful when detecting leaks, they are generally less suitable in commercial applications due to their lower effectiveness in providing clear leak detection in specific conditions. Acetone and bleach, while also potentially harmful, may not be as commonly discussed in terms of their compatibility with leak detection systems compared to ammonia and chlorine. Hydrogen and nitrogen, being gases at room temperature, are not typically relevant to liquid leak detectors but do not fall under the category of harmful chemistries like ammonia and chlorine do.