Applied Fluid Mechanics: Global Edition
7th Edition
ISBN: 9781292019611
Author: Robert Mott
Publisher: Pearson Higher Education
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Chapter 18, Problem 18.24PP
To determine
Flow rate of air in a pipe with pressure 65 psig and temperature 95oF..
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note: indicate free body diagram
Water enters a pump through a 250 mm diameter pipe at 35 kPa. It leaves the pump at 140 kPa through 1 150 mm diameter pipe. If the flow rate is 150 L/s. Compute the energy head added by pump in meters.
a.8.49
b.20.45
c.15.34
d.13.90
A pump draws water from a reservoir and conveys it to another reservoir 30 m above. The suction pipe is 100 mm in diameter and 10 m long while the delivery pipe is 100 mm in diamter and 150 m long. if the the velocity in the pipe is 3 m/s, the friction factor of the pipe 0.008, and the pump and motor efficiencies are 85 % and 92 %, respectively. Assume height of pump/motor negliglible.
Q1. Calculate the gauge pressure at the pump's inlet (at C) (kN/m2)
Q2. Calculate the gauge pressure at the pump's outlet (at D) (kN/m2)
Q3. Calculate input power to motor (kW)
Compute the average speed of water in a pipe with a diameter of 5.0 cm and delivering 2.5 m3 of water per hour.
Select one:
0.25 m/s
0.13 m/s
0.03 m/s
0.35 m/s
Chapter 18 Solutions
Applied Fluid Mechanics: Global Edition
Ch. 18 - A pipe in a compressed air system is carrying 2650...Ch. 18 - Prob. 18.2PPCh. 18 - Prob. 18.3PPCh. 18 - A duct in a heating system carries 8320 cfm....Ch. 18 - The velocity of flow in a ventilation duct is 1140...Ch. 18 - Prob. 18.6PPCh. 18 - Prob. 18.7PPCh. 18 - Prob. 18.8PPCh. 18 - Prob. 18.9PPCh. 18 - Prob. 18.10PP
Ch. 18 - Prob. 18.11PPCh. 18 - Describe a centrifugal fan with forward-curved...Ch. 18 - Prob. 18.13PPCh. 18 - Prob. 18.14PPCh. 18 - Name four types of positive-displacement...Ch. 18 - Name a type of compressor often used for pneumatic...Ch. 18 - Prob. 18.17PPCh. 18 - Prob. 18.18PPCh. 18 - Prob. 18.19PPCh. 18 - Compute the specific weight of nitrogen at 32...Ch. 18 - Compute the specific weight of air at 1260...Ch. 18 - Prob. 18.22PPCh. 18 - An air compressor delivers 820 cfm of free air....Ch. 18 - Prob. 18.24PPCh. 18 - Prob. 18.25PPCh. 18 - Prob. 18.26PPCh. 18 - Specify a size of Schedule 40 steel pipe suitable...Ch. 18 - For an aeration process, a sewage treatment plant...Ch. 18 - Prob. 18.29PPCh. 18 - Prob. 18.30PPCh. 18 - Prob. 18.31PPCh. 18 - Prob. 18.32PPCh. 18 - Prob. 18.33PPCh. 18 - Prob. 18.34PPCh. 18 - Prob. 18.35PPCh. 18 - Figure 18.14 iD shows a two-compartment vessel....Ch. 18 - Prob. 18.37PPCh. 18 - Prob. 18.38PPCh. 18 - Prob. 18.39PPCh. 18 - A tank of Refrigerant is at 150 kPa gage and 20C....Ch. 18 - Prob. 18.41PP
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- The diameter of the discharge pipe is 7in and that of intake pipe is 9in. The pressure gage at discharge reads 32psi, vacuum gage at the intake reads 12in Hg. If the discharge flow rate is 4ft3/s of water and the brake horsepower is 49, find the efficiency.arrow_forwardA pump is required to transfer water at the rate of 350 kg/s from an open sump to an open storage tank located 30m above the pump. The sucLon pipe is 350mm in diameter and 12m in length and the delivery pipe is 550mm in diameter and 40m in length. Calculate:(a) The maximum height at which the pump may be placed above the sump, so that pressure at the inlet is not less than -80 kPa (gauge) (b) the energy to be supplied by the pump per unit mass of water transferred (c) The input power required by the pump, which is 60 % efficientarrow_forwardA pump recieves 8kgs of water at 220 kPa and 110℃ and discharges it at 1100 kpa. Compute the power required in kW.arrow_forward
- A pump test reports the section pressure at a pump inlet to be 20 kPa below atmosphere. The discharge pressure at a point 1,025 mm above the inlet is 520 kPa. If the volume flow rate of water in the system is 87 L/min, calculate the power, in Watts, delivered by the pump to the fluid.arrow_forwardA hydroelectric plant has a dam with a gross height of 381 m with respect to the collectors and a turbine-generating system with 86% efficiency. the estimated water flow is 110m3/s. The pressure losses in the pipeline have been estimated at 34m. Calculate the number of 116mw pelton turbines required.arrow_forwardA pump with an efficiency of 89.842 percent delivers water at a rate of 13.79 m3/s but with a leakage loss of 0.5 m3/s. The friction losses within the pump result in a 1 m head loss. What is the total dynamic head of the pump in meters if it has a mechanical efficiency of 98 percent?arrow_forward
- A venturimeter is attached to pipe of 80 mm diameter has throat of 40 mm diameter. It is found that pressure in the pipe and at throat is 400 kPa and 130 kPa respectively Find velocity of the flow in the pipe.arrow_forwardA pipeline carrying water reduces from 0.9 m diameter to 0.6 m diameter. The initial water velocity is 2.1 m/s and the initial pressure is 414 kPa. If there is a frictional loss across the pipe reduction of 1.5 metres of water, calculate the force on the pipe reduction.arrow_forwardWater from a reservoir is pumped over a hill through a pipe 3 ft. in diameter, and a pressure of 35 psi is maintained at the summit, where the pipe is 300 ft above the reservoir. The quantity pumped is 55 cfs, and by reason of friction in the pump pipe there is 10 ft of head loss between the reservoir and the summit. What amount of energy must be furnished the water by the pump in kilowatts?arrow_forward
- As seen in Figure 3 below, the water from the tank 1 is pumped to the tank 2 with a flow rate of 5,664 liters/s, passing through a pipe with a diameter of 50.8 mm and a length of 121.92 m. Some of the local losses in the system are also shown on the figure. Calculate the effective power of the pump by taking the relative roughness ɛ / d = 0.001 Note: For all questions, pwater = 1000 kg/m³, g=9.81m/s^2 , the kinematic viscosity of water is 1.0219x106 m²/s and the questions can be solved by accepting the values that are not given.arrow_forwardA 12′′ pipe line carries oil of specific gravity 0.811 at a velocity of 80.0 ft/sec. At points A and B, measurements of pressure and elevation were 52.6 psi and 100.0 ft and 42.0 psi and 110.0 ft,respectively. For steady flow, find the lost head between A and B. indicate the free body diagramarrow_forwardThe volume flow rate of water is 662,73 liters/min. Calculate the maximum length of the pipe [m], which can be used without cavitation? (NOTE: Take water temperature as 10 °C)arrow_forward
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