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- A sluice gate, as shown in Figure Q1, is used to control the upstream water level in a4 m wide rectangular channel. The water discharge in the channel is 12 m3/s. Given the water depth at 1 is 2.4m use the Specific Energy equation to findthe water depth (to 1 decimal place) at 2.The pump in the figure discharges water at 60 liters/sec. Neglecting losses and elevation changes.Assume unit weight of water is 9.81 kN/m³. Determine the mechanical efficiency of the pump if thepower input recorded is 120HP.P2=409 kPaD2-4cm 091.5% 82.5%90.4%95.8%PP₁=125 kPaD₁=10cm ØIn Fig.2, A Pelton wheel has a mean bucket speed (U) of 89 m/s with a jet of water flowing at the rate of 1 m3/s under a head of 270 m. The buckets deflect the jet through an angle of 170º. Calculate the power delivered to the runner and hydraulic efficiency of the turbine. Take Cv = 0.98 , V= Cv root of 2gH , workdone per second by the jet on the runner = ρaV1 (Vw1 + Vw2) x U and Hydraulic efficiency ηh = 2 U (Vw1 + Vw2)/V12
- The horizontal pump in Fig.1 discharges water at 57 m3/h. Neglecting Losses,What power in KW is delivered to the water by the pump? A-836 watt B-8360 watt C-8362 watt D-83600 wattA sluice gate, as shown in Figure Q1, is used to control the upstream water level in a4 m wide rectangular channel. The water discharge in the channel is 12 m3/s. The downstream water depth at 3 is given as 1.2m. Calculate the energy loss (in metres) between 2 and 3.A certain centrifugal pump was tested and its performance curves can be approximated as follows: H = 340 - 1.2(Q2), in feet BP = (0.0521Q3) + (1.25Q2) + (11.042Q) + 134.5, in horsepower where Q is in ft3/s. a. If a single pump is used to deliver water to a system which requires a total of 8 ft3/s, what is the efficiency of the pump (in %)? Take the specific weight of water to be 62.4 lbf/ft3. b. If two of these pumps are connected in series to deliver water to a system whose head requirement is 615 ft, what will be the operating discharge rate in ft3/s of either pump? Assuming the head is equally divided between the two pumps, what is the efficiency of either pump (in %)? Take the specific weight of water to be 62.4 lbf/ft3.
- A certain centrifugal pump was tested and its performance curves can be approximated as follows: H = 340 - 1.2(Q2), in feet BP = (0.0521Q3) + (1.25Q2) + (11.042Q) + 134.5, in horsepower where Q is in ft3/s. If a single pump is used to deliver water of a system which requires a total of 8 ft3/s, what is the efficiency of the pump (in %)? Take the specific weight of water to be 62.4 lbf/ft3.An agricultural land install a pump with a 218mm diameter suction pipe and a 200mm diameter discharge pipe. Respectively each pressure reads 1.12 bars and 0.96 bars. The water flow measured 12.500 liters/min.at normal temperature. Calculate the following: 1. Head at the discharge side, m 2. Velocity Head. m 3. Total Head of the pump, m2. According to what is given in the pressure piping system in the figure; a) Find the direction of flow. b) Find the flow rate and energy loss (hk) of the current in cross section (2) when the energy height is 44 m. c) Determine the type of flow. Note: Physical quantities to the fluid; v= 1,05x105 m2/s ve p= 900 kg/m3 þı = 196200 N/m² D = 0,1m Þ2 = 294300 N/m2 21=15 m 22=10 m Horizontal Comparison Plane
- b) Water flows from a large reservoir through a pipe system which consists of 200 mm diameter ofpipe and 50 mm diameter of nozzle as shown in Figure 3. By neglecting all energy losses, calculate;(ii) Velocity and pressure at AA horizontal pipe carries cooling water from a reservoir as shown in the following figure. If the pipe diameter is 20 cm, the flow rate is 0.06 m3/s, what is the pressure at L= 2000 m? Calculate head loss as hL = 0.015(L/D)(V 2/2g)An open cylindrical tank 800mm in diameter and 2000mm high contains water to a depth of 1.6m. It is rotated about its vertical axis at 13 rad/s. How many liters of water are spilled? Use density of water as 1000kg/m3 and specific weight as 9.81kN/m3