Calculating and Estimating RPDP In Rubber-Lined Fire Hose Lines Student Worksheet Refer to the formula for calculating RPDP on page 231 of your textbook for this assignment. 1. Estimate the pump discharge pressure required to provide 50 PSI at the nozzles in the illustrated hose lay. The nozzles are level with the apparatus. Step 1: Determine Friction Loss o Step 1A: To solve this type of problem it is necessary to determine the friction loss in each of the two 1\" lines and pump to the one having the most friction loss. Highest GPM flow is 30 GPM, so flow is _____ GPM. Friction loss for 100 feet of 1\" line is _________PSI. Friction loss for 300 feet of 1\" line is _________PSI. o Step 1B: Determine friction loss on the pump side of the wye Total flow from all nozzles is _____ GPM. Friction loss for 300 feet of 1 inch hose is ____ PSI. o Step 1C. Determine friction loss from appliances 1 appliance in the line creates _____ PSI loss. o Step 1D. Add all friction loss _____ + _____ + _____ = _____ PSI Total Friction Loss Step 2. Determine elevation loss Average difference is 0 feet, so elevation loss is _____. Step 3. Add desired nozzle pressure, friction loss, and elevation loss to determine pump discharge pressure (PDP = NP + FL + EL) ______ + ______ + ______ = ______ PSI 2. Estimate the pump discharge pressure required to provide 80 PSI at the nozzles. One nozzle is level with the apparatus; the other is 20 feet above. Step 1. Determine Friction Loss o Step 1A: To solve this type of problem it is necessary to determine the friction loss in each of the two 1 3/4\" lines and pump to the one having the most friction loss. Friction loss for 100 feet of 1 \" inch hose is ________ PSI. o Step 1B. Determine friction loss on the pump side of the wye Friction loss for _200____feet of 2 inch hose is ____ PSI. o Step 1C. Determine friction loss from appliances _____ PSI loss. o Step 1D. Add all friction loss _____ + _____ + _____ = _____ PSI Total Friction Loss Step 2: Determine elevation loss Average difference is _____ feet, so elevation loss is _____. Step 3. Add desired nozzle pressure, friction loss, and elevation loss to determine pump discharge pressure (PDP = NP + FL + EL) ______ + ______ + ______ = ______ PSI