A 10 m wide rectangular channel carries a discharge of 20 m³/s under critical condition. Using g = 9.81 m/s2, the specific energy (in m, up to two decimal places) is

A rectangular channel 10 m wide carries 60 m3/s when flowing 3 m deep. What is the specific energy? Select the correct response: 4.20 3.20 2.30 1.30 O

Problem 12.24 In a 1 in 20 model of stilling basin, the height of the hydraulic jump in the model is observed to be 0.20 metre. What is the height of the hydraulic jump in the prototype ? If the energy 1 kW, what is the corresponding value in prototype ? 10 dissipated in the model is B qrecpsn

Water is flowing in a 90° triangular channel at a depth of 39 cm. A hydraulic jump occurs. The depth after the jump is 126 cm. a. What is the discharge?b. What is the decrease in specific energy caused by the jump?c. What is the head loss in kW?

Water discharging into a 6 m wide rectangular horizontal channel from a sluice gate is observed to have undergone a hydraulic jump. If the flow depth and velocity before the jump are 0.5 m and 8 m/s, respectively, then which of the following statements is/are true? A Flow depth after the jump is 2.31 m. B Hydraulic jump formed is a weak jump. C Efficiency of jump is 65.6%. D Relative energy loss is 0.824.

Q(1): A horizontal rectangular stilling basin is used at the outlet of a spillway to dissipate energy. The spillway discharges 13m'/s and has a uniform width of 12m. At the point where the water enters the basin, the velocity is 10m/s, compute: • The sequent depth of the hydraulic jump, The length of the stilling basin, • The energy loss in the jump, • The efficiency of the jump (the ratio of specific energy after to the specific energy before the hydraulic jump, • If the thickness of the basin is 0.75m, and the sieve analysis for the site soil indicate the d50 is 0.05mm, are the requirements of scour design satisfied or not?

(4) A reservoir discharges through a steel pipeline, which is 910 mm diameter, 2500 m long and has wall thickness 32 mm. Water is flowing along the pipe at a steady mean velocity 2.5 ms'. (a) Calculate the speed of water hammer waves in the pipe. (b) Calculate the rise of pressure which would occur if the flow through the pipe were reduced rapidly to zero due to a failure of the turbine at the downstream end of the pipe. (c) Describe the sequence of events which follows this sudden closure, giving the times and pressure where appropriate, assuming that cavitation does not occur and neglect any other friction losses. (d) To protect the turbine, a surge tank is installed at the downstream end of the pipe, before the turbine (as shown in Figure 2). The surge tank is a simple cylinder, which has a diameter four times that of the pipe. How does the velocity in the surge tank relate to the velocity in the pipe in the event of a sudden closure?

1. The radial flow pump produces 0.8 m of frictional head losses within the pump. If 3.10 m of head are delivered to the pump, what is the pump efficiency?

A cylinder of internal cross-sectional area 2 sq.m. is submerged in a liquid to a depth of 1 m. The cylinder is initially empty and contains a plugged orifice of diameter 20 mm in the bottom. The orifice has a discharge coefficient approximately equal to unity. If the plug is removed, how long will it take the cylinder to fill to the level of the surrounding liquid?