Applied Fluid Mechanics (7th Edition)
7th Edition
ISBN: 9780133494839
Author: Mott
Publisher: PEARSON
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Chapter 7, Problem 7.47PP
As a member of a development team for a new jet ski, you are testing a new prototype. It weighs
velocity, in mph, should you expect the water to exit when the engine runs at rated power?
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The performance characteristics of a certain centrifugal pump are determined from anexperimental setup shown in the figure. When the flow rate of a liquid (SG= 0.9) through thepump is 120 gpm, the pressure gage at (1) indicates a vacuum of 95 mm of mercury and thepressure gage at (2) indicates a pressure of 80 kPa. The diameter of the pipe at the inlet is110 mm and at the exit it is 55 mm.If Z2-Z1= 0.5 m, what is the actualhead rise across the pump? Explainhow you would estimate the pumpmotor power requirement.
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Chapter 7 Solutions
Applied Fluid Mechanics (7th Edition)
Ch. 7 - A horizontal pipe carries oil with a specific...Ch. 7 - Water at 40 F is flowing downward through the...Ch. 7 - Find the volume flow rate of water exiting from...Ch. 7 - A long DN 150 Schedule 40 steel pipe discharges...Ch. 7 - Figure 7.14 shows a setup to determine the energy...Ch. 7 - A test setup to determine the energy loss as water...Ch. 7 - The setup shown in Fig. 7.16 is being used to...Ch. 7 - A pump is being used to transfer water from an...Ch. 7 - In Problem 7.815 (Fig. 7.17), if the left-hand...Ch. 7 - A commercially available sump pump is capable of...
Ch. 7 - A submersible deep-well pump delivers 745 gal/h of...Ch. 7 - In a pump test the suction pressure at the pump...Ch. 7 - The pump shown in Fig. 7.19 is delivering...Ch. 7 - The pump in Fig. 7.20 delivers water from the...Ch. 7 - Repeat Problem 7.14, but assume that the level of...Ch. 7 - Figure 7.21 shows a pump delivering 840L/min of...Ch. 7 - Figure 7.22 shows a submersible pump being used to...Ch. 7 - Figure 7.23 shows a small pump in an automatic...Ch. 7 - The water being pumped in the system shown in Fig....Ch. 7 - A manufacturer's rating for a gear pump states...Ch. 7 - The specifications for an automobile fuel pump...Ch. 7 - Figure 7.26 shows the arrangement of a circuit for...Ch. 7 - Calculate the power delivered to the hydraulic...Ch. 7 - Water flows through the turbine shown in Fig....Ch. 7 - Calculate the power delivered by the oil to the...Ch. 7 - What hp must the pump shown in Fig. 7.30 deliver...Ch. 7 - If the pump in Problem 7.26 operates with an...Ch. 7 - The system shown in Fig. 7.31 delivers 600 L/min...Ch. 7 - Kerosene (sg = 0.823 ) flows at 0.060m3/s in the...Ch. 7 - Water at 60 F flows from a large reservoir through...Ch. 7 - Figure 7.34 shows a portion of a fire protection...Ch. 7 - For the conditions of Problem 7.31 and if we...Ch. 7 - In Fig. 7.35 kerosene at 25 F is flowing at 500...Ch. 7 - For the system shown in Fig. 7.35 and analyzed in...Ch. 7 - Compute the power removed from the fluid by the...Ch. 7 - Compute the pressure at point 2 at the pump inlet.Ch. 7 - Compute the pressure at point 3 at the pump...Ch. 7 - Compute the pressure at point 4 at the press...Ch. 7 - Compute the pressure at point 5 at the press...Ch. 7 - Evaluate the suitability of the sizes for the...Ch. 7 - The portable, pressurized fuel can shown in Fig....Ch. 7 - Professor Crocker is building a cabin on a...Ch. 7 - If Professor Crocker's pump, described in Problem...Ch. 7 - The test setup in Fig. 7.39 measures the pressure...Ch. 7 - If the fluid motor in Problem 7.44 has an...Ch. 7 - A village with a need for a simple irrigation...Ch. 7 - As a member of a development team for a new jet...Ch. 7 - A fire truck utilizes its engine to drive a pump...Ch. 7 - A home has a sump pump to handle ground water from...Ch. 7 - In Problem 6.107 an initial calculation was made...Ch. 7 - A creek runs through a certain part of a campus...Ch. 7 - A hot tub is to have 40 outlets that are each 8 mm...Ch. 7 - A large chipper/shredder is to be designed for use...
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- A centrifugal pump with a 735 mm diameter impeller runs at 1979 rpm. The water enters without whirl, and α2 = 30ª. The actual head produced by the pump is 17 m. Find the hydraulic efficiency when V2 = 6.7. Express your answer in decimals.arrow_forwardA centrifugal pump discharging 10 lps against 25 m of head and operating with an efficiency of 60% requires 4.1 kW at 1000 rpm. What is the theoretical discharge if the speed is increased to 1500 rpm assuming the efficiency remains constant? What is the theoretical head and kW at 1500 rpm?.arrow_forwardWhat is the power ratio of a pump to its 1/5 scale model if the ratio of the heads is 4 to 1?arrow_forward
- For a centrifugal pump of impeller diameter D rotating at N to develop a head of H and discharge Q, what would be the new head developed by the same pump if we halve the impeller speed to N/2? H/A 2H H 4H H/2arrow_forwardConsider a typical centrifugal liquid pump. For each statement, choose whether the statement is true or false, and discuss your answer briefly: (a) V. at the pump’s free delivery is greater than V. at its best efficiency point. (b) At the pump’s shutoff head, the pump efficiency is zero. (c) At the pump’s best efficiency point, its net head is at its maximum value. (d) At the pump’s free delivery, the pump efficiency is zero.arrow_forwardAn irrigation pump delivers water through a 6 - inches horizontal pipe flowing full at the outlet, the jet striking the ground at a horizontal distance of 12 ft and a vertical distance of 4 ft from the end of the pipe. Find the capacity of the pump in gallons per minute.arrow_forward
- A hydraulic orchard pruner is driven by an engine with an output of 20 bhp . If the pump has a mechanical efficiency of 90% . what portion of the engine power is lost to pump friction ?arrow_forward2. A pump draws water from a lake delivered to a height of 50 meters above the lake and encounters 15 meters of headloss. Determine the pump power requirement in Kilo-Watts to deliver a constant supply of 500 Liters per second? The correct answer has a margin of 1 from exact answer. Velocity head is neglected.arrow_forwardThe fluid flow rate was 1 m3 / s and the head was 10 m in the experiment performed at 2000 rpm with the 1/4 ratio model of a centrifugal pump designed to be used for oil. Calculate the power given by the pump to the fluid when the prototype pump operates at 1000 rpm. (ρsu = 1000 kg / m3, ρ oil = 800 kg / m3)arrow_forward
- A pump takes water from an 8 inch suction pipe and delivers it to a 6 inch pipe in which the velocity is 8 feet per second. At a point along the suction pipe, a pressure of 6 psi is observed while a pressure of 60 psi is observed along the discharge pipe, 15 feet higher than the previous point. Whathorsepower must be supplied to the pump of efficiency 80 percent to maintain the system. *can you also provide its figure, Thank you.arrow_forwardIf a pump is capable of lifting 5000kg of water through a vertical height of 60m in 15 min, the power of the pump isarrow_forwardIf a certain centrifugal pump generates 50 meters of head pumping water with a 1.0 specific gravity, how much head does it generate pumping sulfuric acid with a 1.82 specific gravity? (assuming the driver is powerful enough to handle it)arrow_forward
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