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 7.10PP
A commercially available sump pump is capable of delivering
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A centrifugal pump having an overall efficiency of 75%, delivers 1850 liters of water per minute to a height of 20 m through a pipe 10 cm diameter and 100 m long. If f=0.012, calculate the hp to drive the pump.
A centrifugal pump driven by a 160-hp motor rotating at 2400 rpm is used to pump 70°F water in a manufacturing plant. The pump operates against a head of 100 ft and has an efficiency of 70%. If this pump is used under a head of 196 ft, what power will be required?
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 power , assuming the same efficiency.
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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- A pump takes water at 60°F from a large reservoir and delivers it to the bottom of an open elevated tank 25 ft above the reservoir surface through a 3 inch ID pipe. The inlet to the pump is located 10 ft below the water surface, and the water level in the tank is constant at 160 ft above the reservoir surface. The pump delivers 150 gal/min. If the total loss of energy due to friction in the piping system is 35 ft·lbf/lb, Calculate the horsepower required to do the pumping. The pump and its motor have an overall efficiency of 55 %. i. Determine the velocity of the water at point 2 in ft/s. ii. Assuming that the large open reservoir is open to the atmosphere as well, which of the following equations best describes the mechanical energy balance for the system? iii.The Reynolds number for the flow is?arrow_forwardA pump takes water at 60°F from a large reservoir and delivers it to the bottom of an open elevated tank 25 ft above the reservoir surface through a 3 inch ID pipe. The inlet to the pump is located 10 ft below the water surface, and the water level in the tank is constant at 160 ft above the reservoir surface. The pump delivers 150 gal/min. If the total loss of energy due to friction in the piping system is 35 ft·lbf/lb, Calculate the horsepower required to do the pumping. The pump and its motor have an overall efficiency of 55 %. i. What is Delta Z (Z2 - Z1) ? in ft. ii. Determine the theoretical shaft work required in foot-pound force per pound mass.. iii.Determine the actual shaft work needed for this particular mass flow rate in (ft-lbf)/s.arrow_forwardA double suction centrifugal pumps delivers 25ft3 of water at a head of 12m and running at 650rpm. What is the specific speed of the pump? ANSWER: 3097.77rpmarrow_forward
- One industry has bought 4 centrifugal pumps. For each pump, the maximum total head is 25 m, and maximum discharge is 20 L/s, 30 L/s, 40 L/s, and 50 L/s, respectively. By using these pumps, how can 130 L/s discharge be achieved? – Explain. • Draw respective diagram(s) for this mechanismarrow_forwardA double-suction centrifugal pump delivers 3 m3/s of water at a head of 15 m and running at 1200 rpm. Calculate the specific speed of the pump.arrow_forwardA 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_forward
- 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.arrow_forwardA pump with a shaft input of 8.62 kw and an efficiency of 72 % is connected in a water line carrying 150 li / s. The pump has a 15 cm diameter suction line and a 12 cm diameter discharge line. The suction line enters the pump 2.3 m below the discharge line. For a suction pressure of 84.6 KN/m², calculate the pressure at the discharge flange.arrow_forwardA centrifugal pump is to be placed at the bottom of a vertical shaft 350 m deep to deal with an inflow of water at the rate of 22 l/s. The choice lies between three pumps, one of 115 kW, one of 185 kW and one of 300 kW. Each pump has efficiency of 85%. 1. For each pump, calculate the approximate rate (litres/s) that can be pumped (ignore the friction and velocity heads) 2. For each pump, calculate the number of hours the pump would have to run (during a 24-hour day) to handle the inflow. 3. Which pump should be installed if the capacity should be at least double that required in case of flooding?arrow_forward
- A centrifugal pump with 2.3 diameter impeller running at 327 rpm delivers 7.9 m3/s of water. The head developed is 72.8 m. The width of the impeller at outlet is 0.22 m. If the overall efficiency is 91.7% determine the power to drive the pump.arrow_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_forwarda pump operating at 1750 rpm delivering 600 gpm against total head of 200 tt. changes in the piping system have increase the total head of 450 tt. At what RPM should the pump be operated to achieve thus new head at the same efficiency?arrow_forward
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