What does DC symbology 'SB' indicate?

What does DC symbology 'SB' indicate?

• A. Smoke Boundary
• B. Smoke Barrier
• C. Spill Boundary
• D. Smoke Detected

Answer: (C)

In DC diagrams, two-letter abbreviations quickly name the type of boundary or condition you’re dealing with. SB stands for Spill Boundary, which marks the limits of a liquid spill so you can contain it, keep it from spreading, and guide actions like deploying barriers, securing drains, and isolating valves within that boundary. This is about containing a liquid hazard, not about smoke control or detection. Smoke-related annotations would refer to smoke boundaries or smoke barriers, while “smoke detected” is a status, not a boundary line. So the spill boundary is the correct interpretation.

In DC diagrams, two-letter abbreviations quickly name the type of boundary or condition you’re dealing with. SB stands for Spill Boundary, which marks the limits of a liquid spill so you can contain it, keep it from spreading, and guide actions like deploying barriers, securing drains, and isolating valves within that boundary. This is about containing a liquid hazard, not about smoke control or detection. Smoke-related annotations would refer to smoke boundaries or smoke barriers, while “smoke detected” is a status, not a boundary line. So the spill boundary is the correct interpretation.