A temporary standpipe used during construction must be at least _______ in diameter

A temporary standpipe used during construction must be at least _______ in diameter

• A. 2"
• B. 3"
• C. 4"
• D. 6"],

Answer: (C)

The main idea is that a temporary standpipe on a construction site must be large enough to deliver sufficient water flow for firefighting without excessive pressure loss. The minimum diameter is four inches. This size helps minimize friction losses so hose outlets can maintain usable pressures, even when multiple hoses or larger flows are needed. Smaller diameters, like two or three inches, would restrict flow and make it harder to attack a fire effectively. A six-inch line, while capable, isn’t usually necessary for temporary use and adds extra cost and handling challenges. Four inches strikes a practical balance, providing adequate capacity for typical construction-site firefighting needs.

The main idea is that a temporary standpipe on a construction site must be large enough to deliver sufficient water flow for firefighting without excessive pressure loss. The minimum diameter is four inches. This size helps minimize friction losses so hose outlets can maintain usable pressures, even when multiple hoses or larger flows are needed. Smaller diameters, like two or three inches, would restrict flow and make it harder to attack a fire effectively. A six-inch line, while capable, isn’t usually necessary for temporary use and adds extra cost and handling challenges. Four inches strikes a practical balance, providing adequate capacity for typical construction-site firefighting needs.