A 62 m by 80 m room in a warehouse will be protected by individual fire sprinklers spaced throughout the ceiling. Each sprinkler head covers a 4 m by 4 m area and will discharge approximately 180 liters/minute (L/min). Sprinkler heads are located in straight rows spaced at 4 m on center. For preliminary design, approximate the following: a. The minimum number of sprinkler heads required b. The minimum number of rows of sprinkler heads, if rows run transversely (widthwise) through the building c. The minimum number of rows of sprinkler heads, if rows run longitudinally (lengthwise) through the building d. The flow rate of the system, in L/min, based on the number of sprinkler heads

While planning a future expansion, a water distribution pipe will be replaced as shown in Figure 2. The current plan is for the new configuration to have the same head-loss between points A and B once the new pipes are laid. Considering that the physical characteristics of these new pipes will be identical to the previously laid pipe (L, D, CHW), (A) what will the new operational flow be? After years of wear and tear while operating above the required flow, the pipes have prematurely degraded. The Hazen-Williams coefficients have dropped to: CHW₁= 130, CHW2= 135, CHW3= 125. You must now (B) quantify the head-loss between points A and B for an operational flow of 200 l/s. A -▬▬▬▬▬▬▬▬▬▬▬▬▬▬ LA-B = 150 m D = 0.15 m Qoperational =50 1/s CHW= 150 B ▬▬▬▬▬ A ▬▬▬▬▬▬ Pipe 1 Pipe 2 Pipe 3 Figure 2 Initial (left) and future (right) pipe configuration B

Part 1 Part 2 Part 3 hp A centrifugal pump having a 7.5-in-diameter impeller and the characteristics shown in the figure below is to be used to pump gasoline through 4000 ft of commercial steel 3-in.-diameter pipe. The pipe connects two reservoirs having open surfaces at the same elevation. Determine the flowrate. Do you think this pump is a good choice? This figure is referred to as the pump performance characteristics. 500 8 in. dia 400 7 出300 6 Head, ft 200 100 65 60 55 50 40 bhp 30 25 20 80 ° 40 120 160 200 240 280 320 Capacity, gal/min Write the system equation for this flow system as function of the friction factor f and volume flowrate Q in gal/min. (Use 2 significant digits on coefficients. Do not enter units as a part of your response.)

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