At the foot of a spillyway, water flows at a depth of 23 cm with a velocity of 8.1 m/s, as shown in the figure. vi 101 mumixem ai perbelb (b)

V,=5m/s Water enters a 120- horizontal reducing pipe with a velocity of 5m/s and a pressure of 78.48 kNm2. If the diameters atthe entrance and exit sections are 30 cm and 20 cm respecí vely and assuming no degradation of energy within the pipe, find: 60 15. The flow rate passing through the pipe is a) 0.09 m³/s b) 0.1571 m/s c) 0.3534 m/s d) 1.5 m/s 16. The velocity of flow at the exit is a) 11.25 m/s b) 1.77 m/s c) 5.0 m/s d) 25.0m/s 17. The pressure at the exit of the pipe is a) 27.7 kN/m? b) 78.48 kN/m? c) 15.2 kN/m2 d) 81.3 kNm2 18. The horizontal component of the force on the pipe from the water is b) 7315 N a) 7750.7 N c) 5549N d) 9739 N 19. The vertical component of the force on the pipe from the water on pipe is b)4216 N a) 2701 N c) 3459 N d) 5673 N 20. The direction of the resultant force relative to the horizontal direction is b) 23.4. a) 66.6. c) 30. d) 70-

3. [Ch4 - 1] What is the head loss and corresponding pressure drop (in units of bars) across a 30- mm-wide open gate valve when oil (SG = 0.90) flows through at a rate of 4 x 10-3 m/s? 4. [Ch4 – 2] Oil (SG = 0.80, v = 10- m/s) flows at a rate of 2 x 10-3 m'/s through a 20-mm- diameter commercial steel pipe. What is the equivalent length of a 20-mm-half open gate valve placed in the line?

A thin 6-ft-wide, right-angle gate with negligible mass is free to pivot about a frictionless hinge at point O, as shown in the figure below. The horizontal portion of the gate covers a 2-ft diameter drain pipe, which contains air at atmospheric pressure. Determine the minimum water depth, h, at which the gate will pivot to allow water to flow into the pipe. Width 6ft- Right-angle gate Hinge 39000 0. 4 ft Water 2ft-diameter pipe