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 7.49PP
A home has a sump pump to handle ground water from around the foundation that needs to be removed to a higher elevation. To achieve a flow rate of
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1.calculate the pressure in a hydraulic system if the pump delivers 180 liters /min, and the engine has a power capacity of 75kw.2.The engine has a given capacity of 60kw, calculate the power requirement in a hydraulic system tool , to know that the engine is capable to support the hydraulic system if a pump delivers 110 liters per minute and the pressure is 227bar.
Figure 8.12 shows a portion of a fire protection system in which a pump draws water at 60°F from a reservoir and delivers it to a point B at the flow rate of 1500 gal/min.
c. A lorry is carrying 4000 liters of water. It is driven from Kota Kinabalu to Mesilau and it
was discovered that the tank was only half full on arrival. The driver started with a full
tank, climbed at a steady rate, and accomplished the 1000 meters elevation change in 3
hours. If the water leaked at a steady rate, compute how much work was spent to carry
water to the top? Do not count the work done by the driver and the lorry to get there.
Water weighs 9.8 N/liter.
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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- Seven hundred gpm of water are being discharged by a centrifugal pump 5 ft. above the pump inlet. The inlet pressure is 4-in Hg above atmospheric and the discharge pressure is 29 psia. Assume the pump input is 8 hp, if the pump has an 8-inch diameter inlet and a 4-inch diameter discharge: 1.How much pressure loss in the pump? a. 28.4 ft-lbf/lb b. 5 ft-lbf/lb c. 4.7 ft-lbf/lb d. 38.1 ft-lbf/lb 2. How much is the velocity loss in the pump? a. 28.4 ft-lbf/lb b. 45.3 ft-lbf/lb c. 4.7 ft-lbf/lb d. 38.1 ft-lbf/lb 3. If the pump speed is increased from 1600 to 2400 rpm, what will be the new net flow rate in the pump? a. 800 gpm b. 1050 gpm c. 1400 gpm d. 1965 gpm 4. Find the new brake horse power if the pump speed in increased from 1600 to 2400 rpm. a. 64 hp b. 20.25 hp c. 8 hp d. 30.375 hparrow_forwardA water pump develops a total head of 200 feet. The pump efficiency is 80% and the motor efficiency is 87.5%. If the power rate is 1.5 cents per kWh, what is the power cost for pumping 100 gal/hr?A. 34 cents per hourB. 1.34 cents per hourC. 2.34 cents per hourD. 3.34 cents per hourarrow_forwardA small centrifugal pump is used to deliver 0.005 m/s of water to level 2 as shown in Fig. 2. Neglecting the losses, determine the required power input to the pump if its efficiency is equal to 70%. Level 2 30 m Pump Figure 2: Schematic diagram of task 2.arrow_forward
- Use the Goulds Pump Selection System to find a pump capable of delivering at least 500 gpm against an elevation gain of 120 ft. Use 150 ft as the pump head to be safe.arrow_forward1. The pressure in a hydraulic system has 120 bars and the engine power of 55.21 kw. Calculate the capacity of the pump to supply the system?2. The above pump had an actual flow of 90 liters/minute at 207 bar. Calculate the power of the hydraulic engine system?arrow_forwardA pump discharges water at a rate of 10 fps with an internal pipe diameter of 3 inches What is the level of water after 15 minutes in a cylinder tank 10 ft in diameter and 12 ft higharrow_forward
- 4. A submersible pump delivers 350 gpm of water to a height of 5 ft from the ground. The pump was installed 120 ft below the ground level and a draw down of 8 ft during the operation. If water level is 25 ft above the pump, determine the pump power.arrow_forwardFind the volume flow rate of water exiting from the tank shown in Fig. 7.12. The tank is sealed with a pressure of 140 kPa above the water. There is an energy loss of 2.0 N-m/N as the water flows through the nozzle.arrow_forwardA centrifugal pump, driven by a DC motor, running at 100 rpm delivers 500 gpm of water against a total pumping head of 75 feet with a pump efficiency of 68%. a. Specify the motor hp required. b. Determine the resulting pump speed and capacity if the pump rpm is increased to product a pumping head of 110 ft assuming the efficiency remains the same. c. Can a 15 hp motor be used under the conditions indicated in item b?arrow_forward
- A pump discharges into a 3-m per side cubical tank. The flow rate is 300 liters per minute and the fluid has a specific gravity of 1.2. what is the mass flow rate in kg/s?arrow_forwardA system requires a pump to deliver 30 gal/min at 1500 lbf/in2 at an engine speed of 2000 rpm. calculate theoretical pump displacement, engine torque to drive the unit, and horsepower.arrow_forward2.14. A pump is driven by a two-speed motor having speeds of 1750 and 1185 rpm. At 1750 rpm, the flow is 45 gpm, the head is 90 ft, and the total efficiency is 0.60. The pump impeller has a diameter of 10 in. a. What values of Q, H, and ns are obtained if the pump runs at 1185 rpm? b. Find the specific speed and the specific diameter of the pump (at 1750 rpm).arrow_forward
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