Fluid Mechanics: Fundamentals and Applications
4th Edition
ISBN: 9781259877827
Author: CENGEL
Publisher: MCG
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 5, Problem 126P
Which one is not an assumption involved with the Bernoulli equation?
(a) No elevation change
(b) Incompressible flow
(c) Steady flow
(d) No shaft work
(e) No friction
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
(a) Water flows by gravity from one lake to another as illus-
trated; the surface levels of the lakes differ by an eleva-
tion of h= 50 ft. If the volumetric flow rate is steady at
Q = 80 gallons per minute, what is the associated loss
of available energy?
(b) A pump is to be installed to pump the water from the
lower lake to the upper lake with the same flow rate
as above (Q = 80 gpm). If the amount of energy loss
is assumed to be the same as in part (a), how much
mechanical power must be supplied by the pump?
Answer: (a) loss = 1600 ft-lb/slug, (b) Wpump = 2.0
hp
In a detergent making process, 25 m3/h of water flows through a 5 cm diameter pipe system asfollows:Point 1, the suction side of the pump, is at a pressure of 175 kPa. After exiting from the pump,the water runs through a 2 m horizontal length of pipe, a fully-open gate valve, another 2 mhorizontal run, a 90º bend, 0.5 m vertical rise, 90º bend, 4 m horizontal run, 90º bend, 1.5 m verticalrise, 90º bend, 2 m horizontal run, half-open globe valve, 6 m horizontal run, 90º bend, 4 m verticalrise, 90º bend, 4.5 m horizontal run, 90º bend, 4 m vertical rise, 90º bend, 9 m horizontal run, fully-open gate valve, 1 m horizontal run then, finally, entry into a tank containing 10 m of liquid. Point2 is the liquid surface in the tank, which is open to atmosphere.
(a) If the center-line of the pump and the bottom of the tank are both at grade level, estimate thehead that the pump must deliver. Take the density and viscosity of water as 1000 kg/m3 and 10-3Pa·s, respectively. (b) What is the pump…
Q2(a) Express your understanding of Bernoulli Equation and give two engineering application
examples on this principle ?
A fire rescue team is fight fires at the on-fired yacht as in Figure Q2(b) by draining
seawater with a density of 1030 kg/m³ through a 20-cm-diameter pipe at a rate of 0.1
m³/s and discharging it through a hose nozzle with an exit diameter of 5 cm. The total
irreversible head loss of the system is 3 m, and the position of the nozzle is 4 m above
sea level. Neglect the head loss for turbine. For a pump efficiency of 70 %, determine :
(b)
(i)
the required shaft power input to the pump.
(ii)
the water discharge velocity.
4 m
RE RESCUE
Figure Q2(b)
Chapter 5 Solutions
Fluid Mechanics: Fundamentals and Applications
Ch. 5 - Does the amount of mass entering a control volume...Ch. 5 - Define mass and volume flow rates. How are they...Ch. 5 - Name four physical quantities that are conserved...Ch. 5 - When is the flow through a control volume steady?Ch. 5 - Consider a device with one inlet and one outlet....Ch. 5 - A hair dryer is basically a duct of constant...Ch. 5 - A garden hose attached with a nozzle is used to...Ch. 5 - Air whose density is 0.082 Ibm/ft3 enters the duct...Ch. 5 - A 0.7$-m3 rigid tank initially contains air whose...Ch. 5 - Consider the flow of an incompressible Newtonian...
Ch. 5 - A desktop computer is to be cooled by a fan whose...Ch. 5 - The minimum fresh air requirement of a residential...Ch. 5 - The ventilating fan of the bathroom of a building...Ch. 5 - Air enters a nozzle steadily at 2.21 kg/m3 and 20...Ch. 5 - Air at 40°C flow steadily through the pipe shown...Ch. 5 - In climates with low night-time temperatures, an...Ch. 5 - What is mechanical energy? How does it differ from...Ch. 5 - Define turbine efficiency, generator efficiency,...Ch. 5 - What is mechanical efficiency? What does a...Ch. 5 - How is the combined pump-motor efficiency of a...Ch. 5 - Prob. 21PCh. 5 - A differential thermocouple with sensors at the...Ch. 5 - Electric power is to be generated by installing a...Ch. 5 - Consider a river flowing toward a lake at an...Ch. 5 - Express the Bernoulli equation in three different...Ch. 5 - What are the three major assumptions used in the...Ch. 5 - Define static, dynamic, and hydrostatic pressure....Ch. 5 - What is streamwise acceleration? How does it...Ch. 5 - What is stagnation pressure? Explain how it can be...Ch. 5 - Define pressure head, velocity head, and elevation...Ch. 5 - How is the location of the hydraulic grade line...Ch. 5 - Prob. 33CPCh. 5 - What is the hydraulic grade line? How does it...Ch. 5 - A glass manometer with oil as the working fluid is...Ch. 5 - The velocity of a fluid flowing in a pipe is to be...Ch. 5 - The water level of a tank on a building roof is 20...Ch. 5 - Prob. 38CPCh. 5 - Prob. 39CPCh. 5 - In a hydroelectric power plant, water enters the...Ch. 5 - A Pitot-static probe is used to measure the speed...Ch. 5 - The air velocity in the duct of a heating system...Ch. 5 - A piezometer and a Pitot tube are tapped into a...Ch. 5 - The diameter of a cylindrical water tank is D0and...Ch. 5 - A siphon pumps water from a large reservoir to a...Ch. 5 - Water flows through a horizontal pipe at a rate of...Ch. 5 - An airplane is flying at an altitude of 10.500 m....Ch. 5 - While traveling on a dirt road, the bottom of a...Ch. 5 - The water in an 8-rn-diameter, 3-rn-high...Ch. 5 - Reconsider Prob. 5-49. Determine how long it will...Ch. 5 - Air at 105 kPa and 37°C flows upward through a...Ch. 5 - Water at 20°C is siphoned from a reservoir as...Ch. 5 - The water pressure in the mains of a city at a...Ch. 5 - A pressurized tank of water has a 10-cm-diameter...Ch. 5 - Air is flowing through a venturi meter whose...Ch. 5 - The water level in a tank is 20 m above the...Ch. 5 - The air velocity in a duct is measured by a...Ch. 5 - In cold climates, water pipes may freeze and burst...Ch. 5 - Prob. 61PCh. 5 - A fluid of density and viscosity flows through a...Ch. 5 - What is the minimum diameter at section (1) to...Ch. 5 - What is irreversible head loss? How is it related...Ch. 5 - What is useful pump head? How is it related to the...Ch. 5 - Consider the steady adiabatic flow of an...Ch. 5 - Consider the steady adiabatic flow of an...Ch. 5 - What is the kinetic energy correction factor? Is...Ch. 5 - The water level in a tank is 20 m above the...Ch. 5 - A 3-rn-high tank filled with water has a discharge...Ch. 5 - A person is filling a knee-high bucket with water...Ch. 5 - Tater is being pumped from a large lake to a...Ch. 5 - A 15-hp (shaft) pump is used to raise water to a...Ch. 5 - Water flows at a rate of 0.040 m3/s in a...Ch. 5 - The water level in a tank is 20 m above the...Ch. 5 - A hydraulic turbine has 50 m of head available at...Ch. 5 - In a hydroelectric power plant, water flows from...Ch. 5 - Reconsider Prob. 5-78E. Determine the flow rate of...Ch. 5 - A fan is to be selected to ventilate a bathroom...Ch. 5 - Water flows at a rate of 20 L/s through a...Ch. 5 - The water level in a tank is 34 ft above the...Ch. 5 - A large tank is initially filled with water 4 m...Ch. 5 - Water enters a hydraulic turbine through a...Ch. 5 - A 78-percent efficient 12-hp pump is pumping water...Ch. 5 - Water is pumped from a lower reservoir to a higher...Ch. 5 - Water in a partially filled large tank is to be...Ch. 5 - Underground water is to be pumped by a 78 percent...Ch. 5 - Reconsider Prob. 5-88. Determine the flow rate of...Ch. 5 - The velocity profile for turbulent flow in a...Ch. 5 - The demand for electric power is usually much...Ch. 5 - Prob. 92PCh. 5 - Consider a fully filled hemisphere shaped tank...Ch. 5 - The velocity of a liquid flowing in a circular...Ch. 5 - Air at 250 kgrn3 enters a nozzle that has an...Ch. 5 - The air in a 5m5-m3-m hospital room is to be...Ch. 5 - The water level in a tank is 70 ft above the...Ch. 5 - A pressurized 2-rn-diameter tank of water has a...Ch. 5 - Underground water is being pumped into a pool...Ch. 5 - Prob. 100PCh. 5 - A very large tank contains air at 102 kPa at a...Ch. 5 - Water is flowing through a Venturi meter whose...Ch. 5 - Water flows at a rate of 0.011 m3/s in a...Ch. 5 - Air flows through a pipe at a rate of 120 L/s. The...Ch. 5 - A 3-rn-high large tank is initially filled with...Ch. 5 - Reconsider Prob. 5-105. In order to dram the tank...Ch. 5 - A D0= 1 2-rn-diameter tank is initially filled...Ch. 5 - An oil pump is drawing 18 kW of electric power...Ch. 5 - A wind tunnel draws atmospheric air at 20°C and...Ch. 5 - Consider a spherical tank containing compressed...Ch. 5 - A tank with openings 1,2, and 3 is moving to left...Ch. 5 - Two dimensionally identical containers are...Ch. 5 - A circular thin plate is placed on the top of a...Ch. 5 - A pump-storage plant uses a turbine to generate...Ch. 5 - A diffuser in a pipe flow is basically a slow...Ch. 5 - Prob. 117PCh. 5 - Prob. 118PCh. 5 - Prob. 119PCh. 5 - Air enters a steady-flow compressor at 1 atm and...Ch. 5 - A 7$-m-high water body that is open to the...Ch. 5 - Prob. 122PCh. 5 - Prob. 123PCh. 5 - A hydraulic turbine is used to generate power by...Ch. 5 - The efficiency of a hydraulic turbine-generator...Ch. 5 - Which one is not an assumption involved with the...Ch. 5 - Consider incompressible, frictionless flow of a...Ch. 5 - Consider incompressible, frictionless flow of...Ch. 5 - Consider water flow in a piping network. The...Ch. 5 - The static and stagnation pressures of a fluid in...Ch. 5 - The static and stagnation pressures of a fluid in...Ch. 5 - The difference between the heights of energy grade...Ch. 5 - Water at 120 kPa (gage) is flowing in a horizontal...Ch. 5 - Water is withdrawn a the bottom of a large tank...Ch. 5 - Water at 80 kPa (gage) enters a horizontal pipe at...Ch. 5 - Liquid ethanol (p = 783 kg/m3) at a pressure of...Ch. 5 - Seawater is to be pumped into a large tank at a...Ch. 5 - An adiabatic pump is used to increase the pressure...Ch. 5 - The shaft power from a 90 percent-efficient...Ch. 5 - Using a 1are bucket whose volume is known and...Ch. 5 - Your company is setting up an experiment that...Ch. 5 - Computer-aided designs, the use of better...Ch. 5 - Using a handheld bicycle pump to generate an air...Ch. 5 - Using a flexible drinking straw and a ruler,...Ch. 5 - The power generated by a wind turbine is...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- In wind turbines, the minimum wind speed at which useful power can be generated is called the (a) Rated speed (b) Cut-in speed (c) Cut-out speed (d) Available speed (e) Betz speedarrow_forwardIn the turbomachinery industry, capacity refers to (a) Power (b) Mass flow rate (c) Volume flow rate (d) Net head (e) Energy grade linearrow_forwardDarrow_forward
- The rotating part of a turbine is called (a) Propeller (b) Scroll (c) Blade row (d) Impeller (e) Runnerarrow_forwardThree pumps are connected in parallel. According to pump performance curves, the shutoff head of each pump is as follows: Pump 1: 7 m Pump 2: 10 m Pump 3: 15 m If the net head for this pump system is 9 m, which pump(s) should be shut off? (a) Pump 1 (b) Pump 2 (c) Pump 3 (d) Pumps 1 and 2 (e) Pumps 2 and 3arrow_forward(4) A water hose connected to a nozzle is used to fill a 10 L container. The internal diameter of the hose is 2 cm and the nozzle exit has an inner diameter of 1.7 cm. It takes 30 s to fill up the container. If the inlet pressure is 2 atm and the nozzle exit is 0.8 m above the hosea. What is the velocity (m/s) of water at the outlet stream and at the inlet stream?b. What is the water pressure (atm) at the outlet stream c. What is the mass flow rate of water (kg/s)?arrow_forward
- The Water is flowing through a pipe having diameter 350 mm and 210 mm at the bottom and upper end respectively. The intensity of pressure at the bottom end is 25.85 N/cm? and pressure at the upper end is 11.6325 N/cm? & the rate of flow through the pipe is 40 lit/s. Draw a neat diagram and determine the following: 1.Velocity head at bottom of the pipe in m/s. 2. Velocity head at top of the pipe in m/s. 3. The difference in datum head between top & bottom in meter of water - 4. The difference of pressure head between bottom to top end in meter of water.- The velocity of flow of water at the bottom in m/s.arrow_forwardshow that the temperature of the middle stream is 637.07 deg Carrow_forward5arrow_forward
- I need the answer as soon as possiblearrow_forwardQ.3 In a steady flow of water, water is coming in through Pipe 1 (area 1 m, velocity 1 m/ s) and Pipe 2 (area 2 m, velocity 2 m/s) and 2. going out through Pipe 3 (area 2.5 m-). The exit velocity of Pipe 3 is? A 3 m/s В 6 m/s 5 m/s D 2 m/sarrow_forwardA river (with velocity 3 m/s) is flowing towards a big lake with a volume flow rate of 600 m³/s at a location 100 m above the lake surface. A hydraulic turbine-generator is installed. (1) What is the change of mechanical energy rate [4Ė mech when the water is flowing from the elevated location towards the lake? We take the density of water to be p= 1000 kg/m³. (2) A hydraulic turbine-generator shown in the figure is installed. The overall efficiency of the turbine-generator is 85 percent. What is the electric power output of the entire river? River 3 m/s Generator Turbine 100 marrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University Press
Mechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSON
Thermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEY
Mechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage Learning
Engineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY
8.01x - Lect 27 - Fluid Mechanics, Hydrostatics, Pascal's Principle, Atmosph. Pressure; Author: Lectures by Walter Lewin. They will make you ♥ Physics.;https://www.youtube.com/watch?v=O_HQklhIlwQ;License: Standard YouTube License, CC-BY
Dynamics of Fluid Flow - Introduction; Author: Tutorials Point (India) Ltd.;https://www.youtube.com/watch?v=djx9jlkYAt4;License: Standard Youtube License