Final answer:
The friction loss for extending a 1 3/4" hose line from a high-rise hose pack depends on the length of the hose, flow rate, and the hose's friction coefficient. The formula FL = C * (Q/100) ^2 * (L/100) is used, requiring specific values for accurate calculation.
Step-by-step explanation:
To calculate the friction loss in a 1 3/4" hose line as part of extending a high-rise hose pack, you'll need to take into account several factors including the length of the hose, the flow rate (gallons per minute or GPM), and the coefficient of friction specific to that hose type. The most common way to determine friction loss is using the formula:
FL = C * (Q/100) ^2 * (L/100)
where FL is the friction loss (in psi), C is the friction loss coefficient, Q is the flow rate in GPM, and L is the length of the hose in hundreds of feet.
Without specific values for these variables, we cannot provide an exact friction loss figure. However, this formula can be used when the necessary information is available, and typically fire departments or hose manufacturers will supply the friction loss coefficient (C) for their hoses.