Applied Fluid Mechanics (7th Edition)
7th Edition
ISBN: 9780132558921
Author: Robert L. Mott, Joseph A. Untener
Publisher: PEARSON
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Chapter 7, Problem 7.30PP
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What is the horsepower requirement for a water pump, if the required flow rate is 200 gpm and the required pressure increase assigned to the pump is 32 psi?
A centrifugal pump delivers 0.071 m3/s of water against a head of 7.6-m at 1450 rpm and requires 6.7 kW. If the speed is reduced to 1200 rpm calculate the flow (in m3/s), assuming the same efficiency.
A single-stage centrifugal pump has an impeller speed of 1750 rpm. If the flow rate of water is 60 gal/min, determine the expected head.
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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 pump is delivering 160 liters per second of water using an impeller diameter of 254mm and operating at a speed of 1800 rpm. If the speed is held constant and the impeller diameter is changed to 203.2 mm, what is the new discharged of the pump in liters per second?(128 L/s)arrow_forwardWater (@75C) flows horizontally in a pipe at a rate of 1.6 m3 / min . The dia of the outlet is 2 inches. It enters a 3 inches 45 deg. elbow and is diverted upwards into a connecting pipe. If the pressure just before the elbow is 78 kPa, calculate the magnitude and direction of the force necessary to keep the elbow in place. Say, frictional losses in the elbow are negligible.arrow_forwardCorrect this problem with step-bystep please: A pump moves water horizontally at a rate of 0.02 m^3 /s. Upstream of the pump, where the pipe diameter is 90 mm, the pressure is 120 kPa. Downstream of the pump, where the pipe diameter is 30 mm, the pressure is 400 kPa. If the loss in energy across the pump due to fluid friction effects is 170 N.m/kg. Determine the hydraulic efficiency of the pump.arrow_forward
- At the Manapouri hydroelectric station on the South Island of New Zealand, water from Lake Manapouri drops through 230 meters before being discharged to the sea at Doubtful Sound. The maximum flow rate of water through the plant is 510 cubic meters per second. 1 cubic meter of water has a weight of 1,000 kg. Calculate the maximum amount of power that could be generated at Manapouri. (You can refer to the class handout, the textbook Section 2.2 or the slides for the necessary energy and power conversions). Group of answer choices A. 3.2 TW B. 3500 Watts C.120 MW D. 1.2 GW E. 350 MWarrow_forwardDetermine the least number of stages for a multi stage pump to deliver 60L/s against a total head of 210 meters when running at 1453rpm. If the specific speed must not be less than 675.arrow_forwardPROBLEM 1: Water flows upwards in a vertical pipeline of gradually varying section from point 1 to point 2, which is 1.5m above point 1, at the rate of 0.9m^3/s. At section 1 the pipe diameter is 0.5m and pressure is 800 kPa. If pressure at section 2 is 600 kPa, determine the pipe diameter at that location. Neglect losses.arrow_forward
- A centrifugal pump delivers 2.5 cfs of water against a head of 25 ft at 1500 rpm and requires 10 hp. If the speed is reduced to 1250 rpm calculate the flow (in m^3/s), assuming the same efficiency.arrow_forwardSuppose the pump of Fig. is situated between two large water tanks with their free surfaces open to the atmosphere. Explain qualitatively what would happen to the pump performance curve if a valve in the piping system were changed from 100 percent open to 50 percent open, all else being equal. Repeat for the system curve. What would happen to the operating point—would the volume flow rate at the operating point decrease, increase, or remain the same? Indicate the change on a qualitative plot of H versus V. , and discuss.arrow_forwardA hydraulic pump has a flow rate of 12 gpm and is rated for a maximum pressure of 2000 psi. if the pump is driven at 2100 rpm, what is the maximum Horsepower Output (HPout) of this pump?arrow_forward
- Determine the recommended minimum speed (rpm) for a radial flow pump operating at 0.165 m3/s of water against a head of 300 marrow_forwardCalculate the available suction head height of the centrifugal pump from the following data: (1) The atmospheric pressure is 730 V mm of mercury, (2) the head loss in the suction pipe (including friction loss and accessories loss, etc. is 2.95 meters, ( 3) The speed in the water suction pipe is 1.6m/sec, (4) the water temperature is 30°C.arrow_forwardCompute the average speed of water in a pipe with a diameter of 5.0 cm and delivering 2.5 m3 of water per hour. Select one: 0.25 m/s 0.13 m/s 0.03 m/s 0.35 m/sarrow_forward
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