Final answer:
Option B) Brown indicates oil is NOT true about cap colors of Siamese connections. In a fire service context, brown is not a standard color for oil. The other color codes listed are standard for the gases they represent.
Step-by-step explanation:
The question regarding the cap colors of Siamese connections and their meanings involves an understanding of standardized color-coding systems used for safety and identification purposes. Among the options given:
- Blue typically indicates the presence of nitrogen.
- Brown could be used to indicate the presence of combustible gases but is not standard for oil.
- Green signifies oxygen, which is universally recognized in gas cylinder color coding.
- Yellow is commonly associated with flammability and could be used to indicate flammable materials.
Regarding the Siamese connections specifically, the use of color-coding could vary based on local regulations and practices, but in a standardized context, the correct statement is B) Brown indicates oil, as this is traditionally not a standard color coding for oil in fire service applications.