Applied Fluid Mechanics: Global Edition
7th Edition
ISBN: 9781292019611
Author: Robert Mott
Publisher: Pearson Higher Education
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Chapter 15, Problem 9RQ
Why is there such a difference between the angles of the convergent and the divergent sections for a venturi tube?
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1. How does the manometer reading of the Orifice Meter apparatus affect its discharge? If the flowrate passing through the apparatus is increased, what will happen to the corresponding theoretical discharge?
1 - If the pipeline is now specified to be of Schedule 40 with a nominal diameter of 6 in., and the available pressure at the pump exit is P2 = 132.7 psig, what flow rate Q (gpm) can be expected?
Answer the following additional questions:
2 -If the combination of pump and motor is 80% efficient, how much electrical power (kW) is needed to drive the pump?
3 -, in order to avoid vapour lock, the pressure in the pipeline must always be above the vapor pressure of the crude oil, what is the maximum permissible elevation of point 3 relative to point 4?
4 -If the flow in the pipeline were at the upper limit of being laminar, what pump exit pressure would then be needed? (Answer this part without using the friction factor plot.
Q.4) Differentiate between major and minor losses in pipes.
Chapter 15 Solutions
Applied Fluid Mechanics: Global Edition
Ch. 15 - List six factors that affect the selection and use...Ch. 15 - Define range as it relates to flowmeters.Ch. 15 - Describe three methods for calibrating flowmeters.Ch. 15 - Prob. 4RQCh. 15 - Prob. 5RQCh. 15 - Prob. 6RQCh. 15 - Prob. 7RQCh. 15 - What is the nominal included angle of the...Ch. 15 - Why is there such a difference between the angles...Ch. 15 - Prob. 10RQ
Ch. 15 - Prob. 11RQCh. 15 - Describe an orifice meter and how it is used.Ch. 15 - Describe a flow tube and how it is used.Ch. 15 - Of the venturi, the flow nozzle, the flow tube,...Ch. 15 - Describe pressure loss as it relates to flowmetersCh. 15 - Rank the venturi, the flow nozzle, the orifice,...Ch. 15 - Prob. 17RQCh. 15 - Prob. 18RQCh. 15 - Prob. 19RQCh. 15 - Describe a magnetic flowmeter and how it is usedCh. 15 - Describe how mass flow irate can be measuredCh. 15 - Describe a pitot tube and how it is used.Ch. 15 - Prob. 23RQCh. 15 - Prob. 24RQCh. 15 - Prob. 25RQCh. 15 - Prob. 26RQCh. 15 - Describe the method used to measure the average...Ch. 15 - Prob. 28RQCh. 15 - Describe a hot-wire anemometer and how it is usedCh. 15 - Prob. 30RQCh. 15 - A venturi meter similar to the one in Fig. 15.2has...Ch. 15 - Air with a specific weight of 12.7N/m3 and a...Ch. 15 - Prob. 15.3PPCh. 15 - Prob. 15.4PPCh. 15 - Prob. 15.5PPCh. 15 - Prob. 15.6PPCh. 15 - Prob. 15.7PPCh. 15 - An orifice meter is to be used to measure the flow...Ch. 15 - A flow nozzle is to be installed in a 5-in Type K...Ch. 15 - An orifice meter is to be installed in a 12-in...Ch. 15 - A pitot-static tube is inserted into a pipe...Ch. 15 - A pitot-static tube is connected to a differential...Ch. 15 - A pitot-static tube is inserted in a pipe carrying...Ch. 15 - A pitot-static tube is inserted into a duct...Ch. 15 - A pitot-static tube is inserted into a duct...
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- Which of the following represent primary losses A. fluid splitting devices B. friction along the bends C. the losses due to area change D. loses in valves E. frictions along the pipe lengtharrow_forwardhead loss due to sudden contraction valve in a piping system is much higher than gradually contracting one. Is this statement TRUE or FALSE? elaborate your answer.arrow_forward1) Which of the following statement is NOT correct about piping network? a) In parallel pipes, the flow rate is proportional to its diameter and inversely proportional to its length and friction factor. b) When analyzing the piping network, conservation of mass throughout the system must be satisfied. c) In piping systems with pumps, the Bernoulli equation should be corrected by introducing a kinetic energy correction factor. d) The algebraic sum of head losses for all loops equal to zero. 2) The EGL is always a distance V2/2g above the HGL. True or Falsearrow_forward
- At a flow rate of 20 LPM, What will happen if the 30 seconds is 2.943 kPa, the 60 seconds drops to 2.894 kPa, and the 90 seconds is the same as 30 seconds (2.943 kPa)? HYDROSTATIC PRESSUREarrow_forwardThe speed of water in a pipe of about 3 meters in diameter can be measured by a. pitot tube b. orifice meter c. venturimeter d. rotameterarrow_forwardIn the topic of follow instruments we need to compare and research between 2 systems Orifice plate and venture tube 1- Sketch the cross section of the Orifice Plate 2- Sketch the cross section venture tube 3- explain the working principle of the venture tube and Orifice plate 4- Compare the pressure drop between the Orifice plate and venture tube 5- Find out the application where Orifice plate and venture tube are used 6- explain how Bernoulli’s principle is applied in Orifice plate and venture tube working operation .arrow_forward
- 1. Water flows through a venturi meter. At the constricted section where the area is 24cm², the pressure is 10.2N/cm², and at the section where the area is 64cm², the pressure is 18.0N/cm². Determine the velocities of water in the larger and smaller pipes and the rate of flow. 2. Why is a water tower generally placed on top of a hill? If the hill is 50m high, can it supply water to the top of a 100-m tal officebbuilding? If not, how does water get to that floor?.arrow_forwardQuestion 8 Two reservoirs are connected by a pipe whose total length is 360m.From the upper reservoir the pipe is 300mm in diameterfor a length of 150m and the remaining 210m is 450mm in diameter.The difference in water levels between the two reservoirs are 8m.Take f=0.006 for the smaller pipe and f=0.005 for the larger pipe.If all the changes in pipe sections are sharp and sudden, calculate the flow rate which can be delivered.arrow_forwardThe lengths of two pipes with the same friction factor, "f," are parallel. What must the flow ratio be if the first pipe has twice the diameter of the second?arrow_forward
- OBJECTIVES To demonstrate Bernoulli’s theorem using a Venturi test tube. To determine the difference in velocity at a point of flow in the venturi tube calculated based on observed head differences as read in the manometer and in velocity computed using volumetric method. To prove the empirical reliability of the theorem.arrow_forwardNeed detailed solution. During a trip to the beach (Patm = 1 atm = 101.325 kPa), a car runs out of gasoline, and it becomes necessary to siphon gas out of the car of a Good Samaritan. The siphon is a small-diameter hose, and to start the siphon it is necessary to insert one siphon end in the full gas tank, fill the hose with gasoline via suction, and then place the other end in a gas can below the level of the gas tank. The difference in pressure between point 1 (at the free surface of the gasoline in the tank) and point 2 (at the outlet of the tube) causes the liquid to flow from the higher to the lower elevation. Point 2 is located 0.75 m below point 1 in this case, and point 3 is located 2 m above point 1. The siphon diameter is 5 mm, and frictional losses in the siphon are to be disregarded. Determine (a) the minimum time to withdraw 4 L of gasoline from the tank to the can and (b) the pressure at point 3. The density of gasoline is 750 kg/m3. Answer: Δt = 53.1 s, P3 = 81.1 kPaarrow_forward10.4 Determine the pressure difference between two points on either side of a sudden enlargement from a tube with a 2-in ID to one with a 6-in ID when the velocity of flow of water is 4 ft/s in the smaller tube. 10.5 Determine the pressure difference for the conditions in Problem 10.4 if the enlargement is gradual with a cone angle of 15. Answer: p1-p2= -0.0891 psiarrow_forward
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