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 7.31PP
Figure 7.34 shows a portion of a fire protection system in which a pump draws
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Patrick is building a cabin on a hillside and has proposed the water system shown below. The distribution
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Distribution
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4 ft
Flow
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214 ft
Pump
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A pump draws water from reservoir A and lifts it to reservoir B as shown. The head loss from A to 1 is three times the velocity head in the 150-mm diameter pipe and the head loss from 2 to B is twenty-five times the velocity head in the 100-mm diameter pipe. The discharge in the pipe is 20 liters/second.
Find the power delivered by the pump in kW.
Calculate the pressure head at point 1 in meters.
Solve the pressure head at point 2 in meters.
5. Oil of specific gravity 0.750 is pumped from a tank over a hill through a 24′′ pipe with the pressure at
the top of the hill maintained at 25.5 psi. The summit is 250 ft above the surface of the oil in the tank,
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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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- 1. Water enters through a 23.616 inches diameter pipe under a pressure of 14 kPa. It leaves through a 900mm diameter exhaust pipe with a pressure of 4 kPa. A vertical distance of 8.2 ft separates the centers of the two pipes at the sections where the pressures are measured. If 500 liters of water pass the motor each second, compute the power supplied to the motor.arrow_forwardA centrifugal water pump has a discharge flow rate of 25 gpm. A pressure gauge at the pump suction flange indicates a pressure of -10 psig, while a pressure gauge at the pump discharge flange indicates a pressure of 30 psig. The suction and discharge flanges has the same internal diameter. Also, the elevation difference between the suction and discharge flanges is about 13 inches. Estimate the total dynamic head of the pump in feet. Round your answer to 2 decimal places.arrow_forwardCalculate the pressure of the air in the sealed tank shown in the figure that would cause the volume flow rate of 500 gal/min from the nozzle. The depth h is 10 ft.arrow_forward
- 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.arrow_forwardThe plunger diameter of a single-acting reciprocating pump is 115 mm and the stroke is 230 mm. The suction pipe is 90 mm in diameter and 4.2 m long. If cavitation takes place at the suction head of 4 m, the barometer stands at 10.3 m of water, and the water level in the sump is 3 m below the pump cylinder axis.1. Find the maximum allowable speed to operate the pumparrow_forwardThe pump shown is 75% efficient. If the pressure rise is 120 psi, calculate the required energy input in horsepower.arrow_forward
- 5. A pump draws water from reservoir A and lifts it to reservoir B. The loss of head from A to 1 is three times the velocity head in the 150mm pipe and the loss of head from 2 to B is twenty times the velocity head in the 100mm pipe. Discharge is 20L/s. a. Calculate the horsepower output of the pump in kw. b. Calculate the pressure head at 1 in meters. c. Calculate the pressure head at 2 in meters. B El.240 m ---- El. Om 1 El. -20m 150mm 100 mmarrow_forwardQUESTION 4 The figure below shows a fluid flow system that is designed to pump water at 20 °C from a lower vented reservoir to an elevated vented tank. Note that the drawing is not to scale as the dimensions of the reservoirs are very large relative to those of the piping system. The suction line entering the pump is specified as 20 m of 3½" schedule 40 commercial steel pipe; the discharge line from the pump is 180 m of 2%" schedule 40 commercial steel pipe. 15 m 3 m 31/2-in Schedule 40 steel pipe Fully open gate valve 21/2-in Schedule 40 steel pipe Flanged regular 90⁰ elbows Pump Flow Swing-type check valve valve Butterfly (K butterfly = 0.8) a. Starting from the Bernoulli equation (in 'head' form) for the situation where the liquid levels in the two reservoirs are reference points 1 and 2, derive the correct equation for pump head Hpump (m) in terms of volumetric flow rate Q (m³/s) and other process variables (e.g. z, f, L, D, K). b. Using Excel (or another suitable program), create…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
- Show the step by step solution. Thank you. 3. A pump draws water from reservoir A and lifts it to reservoir B as shown in Figure 4-10. The loss of head from A to 1 is 3 times the velocity head in the 150-mm pipe and the loss of head from 2 to B is 20 times the velocity head in the 100-mm pipe. Compute the horsepower output of the pump and the pressure heads at 1 and 2 when the discharge is: (a) 12 L/s (b) 36 L/sarrow_forward1.Find the diameter of a pipe of length 3000 m when the rate of flow of water through the pipe is 300 litres/s and the head lost due to friction is 5 m. Take the value of C = 50 in Chezy’s formula.arrow_forward4. FLUID FLOW 1. The figure below shows a water tank with piping system for a small manufacturing plant. If water flows through the system ((A) at 40 L/s, what would be the pressure at point B? The water has a density of 998 kg per cubic meter and viscosity of 0.8 centipoise. measures 0.04089 m and 0.04826 m in inside and outside diameter, respectively. The tank is exposed to the atmosphere The 1.5 inches (nominal) wrought iron pipe Given: Q= 40L/s = 0.040 m/s p= 998 kg/m H=0.8 centipoise 0.001P-s = 0.08 P-S Reg'd: Pressure at B. = ? 1 cp i.d. = 0.04089 m o.d. = 0.04826 m length of pipe = 110 marrow_forward
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