Fort Lauderdale Fire Rescue Driver Engineer Manual Practice Exam

To determine the friction loss in a 5-inch hose flowing 1000 GPM, understanding how friction loss is calculated in hoses is essential. The general formula to estimate friction loss in hose lines states that for each 100-foot section of hose, the friction loss can be calculated based on the flow rate.

For a 5-inch diameter hose, the friction loss at 1000 GPM is typically calculated to be around 5 psi for each 100 feet of hose. This takes into account the internal diameter and the characteristics of the fluid flowing through it.

Using the common friction loss formula for large diameter hoses, the loss is comparatively lower than smaller hoses due to the increased area through which the water flows, leading to reduced turbulence and resistance.

By identifying that the calculation yields 5 psi loss for every 100 feet at that flow rate, it confirms that the correct answer is indeed reflective of the established standards within firefighting operations. Understanding this will aid in applying it during practical scenarios and planning hose lays effectively.

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