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 7.18PP
Figure 7.23 shows a small pump in an automatic washer discharging into a laundry sink. The washer tub is
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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.
Choices:
45 ft
60 ft
29 ft
18 ft
2. Water from a reservoir is pump over a hill through a pipe 900mm in diameter and a
pressure of one kg/cm² is maintained at the pipe discharge where the pipe is 85m from the
pump centerline. The pumps have a positive suction head of 5m. Pumping rate or the pump at
1000 rpm is 1.5m³/sec. Friction losses is equivalent to 3m of head loss. What is the head that
should the pump cover for the system?
3. A fire hydrant has an outlet diameter of 630 mm located 1.4
meters above the ground. If the water strikes the ground at a
horizontal distance of 285 meters below the outlet, calculate the
rate of discharge in gals. per min.
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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- 3. A centrifugal pump is to be placed above a large, open water tank, as shown in the figure below. Water is pumped at a rate of I cu ft/s. At this flow rate the required net positive suction head, NPSHR, is 15 ft as specified by the pump manufacturer. The water temperature is 80°F and atmospheric pressure is 14.7 psi. Assume that the major head loss between the tank and the pump inlet is due to filter at the pipe inlet having a minor loss coefficient KL.-20. Other losses can be neglected. The pipe on the suction side of the pump has a diameter of 5 in. The water vapor pressure at 80°F is 0.5069 psia and y-62.22 lb/cu.ft. Determine Z1 for cavitation not to occur.. P1-Patm (1) (2) Reference planearrow_forwardThe two-lobe rotary pump moves 0.145 gal of a coal slurry in each lobe volume Vlobe. Calculate the volume flow rate of the slurry (in gpm) for the case where n. = 220 rpm.arrow_forwardTopics: Fundamental of fluid flow Oil (SG=0.82) entering a pump through an 8-inch diameter pipe at 4 psi has a flow rate of 3.5 cfs. It leaves the pump through a 4-inch diameter pipe at 15 psi. Assuming that the suction and discharge sides of the pump are at the same elevation, find the horsepower delivered to the water by the pump (550 lb.ft/s = 1 HP). Illustrate the problem and show your complete solution.arrow_forward
- pump is used to collect water from an underground tank. the tank water level is 5.44 meters below the pump and the flow is 25.5 litres per second through a 75 mm diameter pipe. calculate the pressure pump and the inletarrow_forwardA pump operating at 1750 rpm delivering 500 gpm against a total head of 150 ft. Changes in the piping system have increased the total head to 360 ft. At what rpm should the pump be operated to achieve this new head at the same efficiency?arrow_forward1. A pump pumping liquid propellant operates at 10,000 rpm. The volumetric flow rate through the pump is 5,000 gpm. The pressure drop across the pump is 750 psi. Propellant density is 71lbm/ft³. Calculate the head produced by the pump. b. Calculate the pump specific speed. Is this a high-performance pump or a low- performance pump? Calculate the input power to the fluid, i.e. the fluid horse power, fnp. а. С.arrow_forward
- the diameter of the suction pipe is 385mm. The diameter of the discharge pipe is 268mm. If centrifugal pump delivers 322388 L/hr of water to a pressurized tank with 293kpa. The source of water is 14m below the pump. Calculate the pump total head in meters.arrow_forwardA pump with a volumetric displacement of 4 in^3/rev runs at 3600 rpm and produces 1500 psi. The actual flow rate is 59 gpm. What is the volumetric efficiency of this pump? Enter a whole number percentage.arrow_forwardExercise Problem No. 1: 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, marrow_forward
- Water recirculates at a volume flow rate of 0.4524 ft3/min from the blade outlet to the impeller, and shaft sealing losses are negligible. A centrifugal pump has a hydraulic efficiency of 95% and a mechanical efficiency of 93%, respectively. Calculate the pump efficiency in percent if the pump delivers water at a flow rate of 12 ft3/min.arrow_forwardWater at 90°C is to be pumped from a low-elevation reservoir to a high-elevation reservoir at a flow rate of 0.0046 cu. meter per second, as shown in the figure below. The atmospheric pressure at the location of the pump installation is 98.4 kPa. The 40-mm-diameter suction pipe has a total length of 7.2 m. The friction factor for the suction pipe is estimated to be 0.025. The centrifugal pump that will be used has an NPSHR of 4.5 m. Will cavitation occur in this pump setup? 5 m ↓ (A) Yes, cavitation will occur with NPSHA equal to 4.80 m. B) Yes, cavitation will occur with NPSHA equal to -5.20 m. No, cavitation will not occur with NPSHA equal to 4.80 m. (D) No, cavitation will not occur with NPSHA equal to -5.20 m. (pump centerline) 19 marrow_forwardA manufacturing company uses a 100 bar hydraulic power system which supplies 10 liter/minute of oilflow. The shaft speed is 1500 RPM and the nominal displacement is 8 cm3/revolution. The theoreticaldrive torque is 11.4 Nm. If the electric motor driving the pump has an efficiency of 95%,a. Name in detail all 27 hydraulic power components as illustrated in the above figure.b. Calculate the volumetric efficiency, the fluid and shaft power, the overall efficiency of the pump.arrow_forward
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