6. A horizontal 150 mm diameter pipe gradually reduces its section to 50 mm diameter, subsequently enlarging into 150 mm section. The pressure in the 150 mm pipe at the point just before entering the reducing section is 140 kPa and in the 50 mm section at the end of the reducer the pressure is 70 kPa. If 600 mm of head is lost between the points where the pressures are known, compute the rate of flow of water thru the pipe.

3. What is the pressure difference between pipe A and pipe B? Give pressure difference in kPa. (y = 1.22 m and h 30 in.) The gage fluid, M, is mercury with a specific gravity of 13.54 State assumed values if any. Water A Water B y D Liquid M

Water flows in a steel pipe (e = 0.00020 feet) at a flow Q = 12.5 cfs. The diameter of the pipe is D = 18 inches and the length of the pipe is L = 2,500 feet between section 1 and section 2. The elevation at section 1 is z = 100 feet above the datum. The elevation at section 2 is z2 = 75 feet above the datum. The temperature of the water is 70°F. The kinematic viscosity of the water is 1.06 x 10° ft/s. The pressure at section 1 is p1 = 90 psig (pounds per square inch gage). a) Determine the velocity v in feet per second (fps). b) Determine the Reynolds number Re. c) Classify the flow based on the Reynolds number Re. d) Determine the Darcy-Weisbach friction factor f. e) Determine the friction head loss hfäic in feet in the pipe between section 1 and section 2. f) Determine the pressure p2 in psiq at section 2.