Applied Fluid Mechanics (7th Edition)
7th Edition
ISBN: 9780132558921
Author: Robert L. Mott, Joseph A. Untener
Publisher: PEARSON
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Chapter 8, Problem 8.36PP
A submersible deep-well pump delivers
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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.
A pumping station wet well operates between 540- and 550-ft elevation. The pump curve is deϐined by the following points: 80 ft at zero ϐlow, 78 ft at 200 gpm, 65 ft at 800 gpm, and 50 ft at 1200 gpm. The pump discharge contains an equivalent of 50 ft of 6-in. pipe. The discharge pipe is 120-ft long and terminates at a splitter box, elevation 570. Using C=100, plot the pump curve and the corrected pump curve. Plot the pump discharge curves at each wet well elevation and for C=100 and C=140. What is the pump ϐlow at the low and high wet well elevations for newand old pipe?
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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29 ft
18 ft
Chapter 8 Solutions
Applied Fluid Mechanics (7th Edition)
Ch. 8 - A 4-in-ductile iron pipe carries 0.20ft3/s of...Ch. 8 - Calculate the minimum velocity of flow in ft/s of...Ch. 8 - Calculate the maximum volume flow rate of fuel oil...Ch. 8 - Calculate the Reynolds number for the flow of each...Ch. 8 - Determine the smallest metric hydraulic copper...Ch. 8 - In an existing installation, SAE 10 oil (sg = 0.89...Ch. 8 - From the data in Appendix C, we can see that...Ch. 8 - Compute the Reynolds number for the flow of 325...Ch. 8 - Benzene (sg = 0.86 ) at 60c C is flowing at 25...Ch. 8 - Hot water at 80 C is flowing to a dishwasher at a...
Ch. 8 - A major water main is an 18 -in ductile iron pipe....Ch. 8 - ]8.12 An engine crankcase contains SAE 10 motor...Ch. 8 - Repeat Problem 8.12 for an oil temperature of 160...Ch. 8 - At approximately what volume flow rate will propyl...Ch. 8 - SAE 30 oil (sg = 0.89 ) is flowing at 45 L/min...Ch. 8 - Repeat Problem 8.15 for an oil temperature of 160...Ch. 8 - Repeat Problem 8.15, except the tube is 50 mm...Ch. 8 - Repeat Problem 8.17 for an oil temperature of 0 C.Ch. 8 - The lubrication system for a punch press delivers...Ch. 8 - After the press has run for some time, the...Ch. 8 - A system is being designed to carry 500 gal/min of...Ch. 8 - The range of Reynolds numbers between 2000 and...Ch. 8 - The water line described in Problem 8.22was a cold...Ch. 8 - In a dairy, milk at 100 F is reported to have a...Ch. 8 - In a soft-drink bottling plant, the concentrated...Ch. 8 - ]8.26 A certain jet fuel has a kinematic viscosity...Ch. 8 - Crude oil is flowing vertically downward through...Ch. 8 - Water at 75 C is flowing in a standard hydraulic...Ch. 8 - Fuel oil is flowing in a 4 -in Schedule 40 steel...Ch. 8 - A 3-in Schedule 40 steel pipe is 5000 ft long and...Ch. 8 - Benzene at 60 C is flowing in a DN 25 Schedule 80...Ch. 8 - As a test to determine the effective wall...Ch. 8 - Water at F flows from a storage tank through ft...Ch. 8 - A water main is an 18 -in-diameter concrete...Ch. 8 - Figure 8.12shows a portion of a fire protection...Ch. 8 - A submersible deep-well pump delivers 745 gal/h of...Ch. 8 - On a farm, water at 60 F is delivered from a...Ch. 8 - Figure 8.15 shows a system for delivering lawn...Ch. 8 - A pipeline transporting crude oil (sg = 0.93 ) at...Ch. 8 - For the pipeline described in Problem 8.39,...Ch. 8 - Water at 10 C flows at the rate of 900 L/min from...Ch. 8 - For the system shown in Fig. 8.17, compute the...Ch. 8 - Fuel oil (sg = 0.94 ) is being delivered to a...Ch. 8 - Figure 8.18 shows a system used to spray polluted...Ch. 8 - In a chemical processing system, the flow of...Ch. 8 - Water at 60 F is being pumped from a stream to a...Ch. 8 - For the pump described in Problem 8.46, if the...Ch. 8 - Gasoline at 50 F flows from point A to point B...Ch. 8 - Figure 8.20 shows a pump recirculating 300 gal/min...Ch. 8 - Linseed oil at 25 C flows at 3.65 in a standard...Ch. 8 - Glycerin at 25 C flows through a straight...Ch. 8 - Water at 75 C flows in a standard hydraulic copper...Ch. 8 - Benzene (sg = 0.88 ) at 60 C, flows in a DN 25...Ch. 8 - Water at 80 F flows in a 6 -in coated ductile iron...Ch. 8 - Water at 50 F flows at 15.0 ft3/s in a concrete...Ch. 8 - Water at 60 F flows at 1500 gal/min in a 10 -in...Ch. 8 - ]8.57 A liquid fertilizer solution (sg = 1.10 )...Ch. 8 - Crude oil (sg = 0.93 ) at 100 C flows at a rate of...Ch. 8 - Water at 65 C flows in a DN 40 Schedule 40 steel...Ch. 8 - Propyl alcohol flows in a standard hydraulic...Ch. 8 - ]3.61 Water at 70 F flows in a 12 -in-diameter...Ch. 8 - Heavy fuel oil at 77 F flows in a 6 -in Schedule...Ch. 8 - Water flows at a rate of 1.50ft3/s through 550 ft...Ch. 8 - Compute the energy loss as water flows in a...Ch. 8 - ]8.65 A water main is an 18 -in-diameter concrete...Ch. 8 - A fire protection system includes 1500 ft of 10...Ch. 8 - ]8.67 A standard hydraulic copper tube, 120 mm...Ch. 8 - Compute the energy loss as 2.0ft3/s of water flows...Ch. 8 - It is desired to flow 2.0ft3/s of water through...Ch. 8 - Specify a suitable size of new, clean Schedule 40...Ch. 8 - For the pipe selected in Problem 8.70, compute the...Ch. 8 - Compare the head loss that would result from the...Ch. 8 - In Problem 6.107, a theoretical flow rate of water...Ch. 8 - A pipeline is needed to transport medium fuel oil...Ch. 8 - Medium fuel oil at 25 C is to be pumped at a flow...Ch. 8 - A tremendous amount of study has gone into the...Ch. 8 - In a given installation, it is determined that the...Ch. 8 - "Laminar" fountains have become quite popular due...Ch. 8 - Use PIPE-FLO to model a straight horizontal run of...
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- A radial bladed centrifugal pump running at 1440 rpm is to deliver 30 l/min of water against a head of 20 m. Assuming flow velocity as 3 m/s. Determine the diameter and width of the impeller at the outlet.arrow_forwardCalculate the minimal head of the pump required to pump 1 m³ of water per second to the height 10 m trough a pipe with cross sectional area 0.1 m². Assume constant friction coefficient f = 0.04 and neglect all losses in fittings. The pump head is the gravity head plus losses and so it can be found?arrow_forwardA 150mm diameter penstock supplies water to a turbine under a constant head of 30m. Calculate the theoretical velocity of flow.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 head, assuming the same efficiency.arrow_forwardA 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.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
- Figure Q6 shows the head (H) vs flow rate (Q) curves of a centrifugal pump at a certain condition where the pump operating flow rate is Q1 as shown in Figure Q6. However, the required flow rate is Q2. With the help of sketches or graphs, discuss possible solutions that can be applied to produce the required flow rate Q2.arrow_forwardassume a flow of 1.7 m3/hr. the pressure readings are 0.1 bar at the bare pump and 0.3 at the integral pump when they are connected in series. calculate the corresponding heads of the above pumps connected in series. what happens if the pumps are connected in parallel? Please correct answerarrow_forwardWater is pumped thru a vertical 50mm new galvanized-iron pipe to an elevated tank on the roof of a building.The pressure on the discharge side of the pump is 1400kpa. What pressure can be expected at a point in the pipe 75mm above the pump when the flow is 9 liters/sec?arrow_forward
- A radial flow pump operating at maximum efficiency at a specific speed of 2300 is to deliver 260gpm against a head of 129ft at a rotative speed of 2100 rpm. Find the required number of stages. ANSWER: 3arrow_forwardAt 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_forwardA well is going to be installed with a sucker rod pumping unit a. For the well to be installed with a sucker rod pump calculate the effective plunger stroke length for a well with a rod pump set at 3600 ft. The well has 3/4-in. sucker rods and 2 7/8-in. tubing, and the specific gravity of the produced liquid is 0.90. The pump speed is 12 spm, the plunger is 2 in. in diameter, and the polished rod stroke length is 64 in.The well is pumped off, so the liquid level is at the pump depth. b. For well in part a surface production rate the surface with a rod pump having a volumetric efficiency of 0.8. The oil formation volume factor is 1.2arrow_forward
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