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Chapter: 10 -Problem: 49 >> For the data in Problem 10.47, compute the resistance factor and the energy loss for a coil of the given tube that makes six complete revolutions. The mean bend radius is the same, 2.00 in.In ProblemCompute the energy loss in a 90 bend in a steel tube used for a fluid power system. The tube has a ½-in OD and a wall thickness of 0.065 in. The mean bend radius is 2.00 in. The flow rate of hydraulic
Answer Preview: Data from problem 10 47 Coil with 6 0 revolutions K 0 50…

, Chapter: 3 -Problem: 15 >> Require that you convert the given pressure from gage to absolute pressure or from absolute to gage pressure as indicated. The value of the atmospheric pressure is given.Given Pressure             P atm               Express Result As: 157 kPa(abs).............101 kPa(abs)................Gage pressure
Answer Preview: p gag…

, Chapter: 9 -Problem: 25 >> Refer to the shell-and-tube heat exchanger shown in Fig. 9.13. The outer tube has an OD of 7/8 in and the OD of the inner tube is ½ in. Both tubes are standard steel tubes with 0.049-in wall thicknesses. The inside tube carries 4.75 gal/min of water at 200°F and the shell carries 30.0 gal/min of ethylene glycol at 77°F to carry heat away from the water. Compute the Reynolds number for the flow in
Answer Preview: Tube D 0 402 in 0 03350 ft A 8 814 10 4 ft 2 Shell A 3 29…

, Chapter: 8 -Problem: 10 >> Hot water at 80°C is flowing to a dishwasher at a rate of 15.0 L/min through a standard hydraulic copper tube, 15 mm OD × 1.2 mm wall. Is the flow laminar or turbulent?
Answer Preview: NR 2 005 0 0126 3 601…

, Chapter: 16 -Problem: 14 >> Seawater (sg  1.03) enters a heat exchanger through a reducing bend connecting a 4-in Type K copper tube with a 2-in Type K tube. The pressure upstream from the bend is 825 kPa. Calculate the force required to hold the bend in equilibrium. Consider the energy loss in the bend, assuming it has a resistance coefficient K of 3.5 based on the inlet velocity. The flow rate is 0.025 m3/s.
Answer Preview: pQv 1 1 03 1000 kg m 3 0 025 m 3 3 32 m s 85 5 kgm s 2 85 5 N pQv 2 1 03 1000 0 025 12 85 …

, Chapter: 11 -Problem: 26 >> Specify the size of new Schedule 40 steel pipe required to carry gasoline at 77°F through 120 ft of horizontal pipe with no more than 8.0 psi of pressure drop at a volume flow rate of 100 gal/min.
Answer Preview: APPLIED FLUID MECHANICS Objective Minimum pipe diameter Problem 11 26 System Data SI Metric Units Pressure at point 1 Pressure at point 2 Elevation at …

, Chapter: 3 -Problem: 43 >> An airplane is flying at 10.6 km altitude. In its nonpressurized cargo bay is a container of mercury 325 mm deep.The container is vented to the local atmosphere. What is the absolute pressure at the surface of the mercury and at the bottom of the container? Assume the conditions of the standard atmosphere prevail for pressure. Use sg = 13.54 for the mercury.
Answer Preview: p atm 24 77 kPa abs By int…

, Chapter: 8 -Problem: 76 >> A tremendous amount of study has gone into the fluid effects of air over various spheres due to the impact on sports and recreation. Golf balls, for example, are dimpled due to the tremendous effect on flow characteristic and resulting drag force. Chapter 17 states that for a spherical body moving through a static fluid, the standard Reynolds number Eq. (8€“1) can be used if the value of D is take
Answer Preview: A B C D Z VxD V mi …

, Chapter: 7 -Problem: 2 >> Water at 40°F is flowing downward through the fabricated reducer shown in Fig. 7.11. At point A the velocity is 10 ft/s and the pressure is 60 psig. The energy loss between points A and B is 25 lb-ft/lb. Calculate the pressure at point B. Transcribed Image Text: 4-in diameter Flow 30 ft - 2-in diame
Answer Preview: PA ZA YW v 28 PB h 60 psig PB PA Z…

, Chapter: 16 -Problem: 13 >> A 2-in nozzle is attached to a hose with an inside diameter of 4 in. The resistance coefficient K of the nozzle is 0.12 based on the outlet velocity head. If the jet issuing from the nozzle has a velocity of 80 ft/s, calculate the force exerted by the water on the nozzle.
Answer Preview: R x Q v 1 v 2 1 A 1 1 94 0 0218 80 20 80 6550 0 087…

, Chapter: 10 -Problem: 72 >> Use PIPE-FLO® to calculate the head loss and pressure drop in a length of pipe that includes a filter. The pipe is a horizontal 6-in Schedule 40 pipe. The total length of pipe is 45 ft and the manufacturer of the filter specifies that it has a K-factor value of 0.82. Water at 60°F flows through the system at 9 ft/s. The pressure in the tank is 75 psig.
Answer Preview: FLO Sh Zoom C Fixed Device Centuel Pump Presuri Devic…

, Chapter: 3 -Problem: 2 >> Define absolute pressure.
Answer Preview: Absolute pr…

, Chapter: 8 -Problem: 75 >> Medium fuel oil at 25°C is to be pumped at a flow rate of 200 m3/h through a DN 125 Schedule 40 pipe over a total horizontal distance of 15 km. The maximum working pressure of the piping is to be limited to 4800 kPa gage and the pumps being used require an inlet pressure of at least 70 kPa absolute. Determine the number of pumping stations needed to traverse the total distance. Sketch your design.
Answer Preview: PV 2g Y NR Z h h Q AxVV VxD V LV X h fx D of Stations P V Z P …

, Chapter: 6 -Problem: 56 >> Use Fig. 6.3 to specify suitable Schedule 40 pipe sizes for carrying the given volume fl ow rate of water in the suction line and in the discharge line of a pumped distribution system. Select the pipe sizes both above and below the curve for the given fl ow rate and then calculate the actual velocity of flow in each.Use Q = 2000 gal/min. Distribution The word "distribution
Answer Preview: Q 2000 gal min 1 ft 3 s 449 gal min 4 454 ft 3 s Suc…

, Chapter: 19 -Problem: 24 >> A section of duct system consists of 42 ft of straight 12-indiameter round duct, a wide-open damper, two three-piece 90 elbows, and an outlet grille. Compute the pressure drop along this duct section for Q = 700 cfm.
Answer Preview: Use Q 700 cfm D 12 in dia v 900 ft min h L 0 12 in H 2 O pe…

, Chapter: 10 -Problem: 1 >> Determine the energy loss due to a sudden enlargement from a 50 mm OD × 2.4 mm wall plastic pipe to a 90 mm OD × 2.8 mm wall plastic pipe when the velocity of flow is 3 m/s in the smaller pipe.
Answer Preview: D 2 D 1 84 4 45 …

, Chapter: 1 -Problem: 70 >> Calculate the weight of a jar of castor oil if it has a mass of 450 g.
Answer Preview: 1kg 10 g …

, Chapter: 9 -Problem: 8 >> An existing fixture inserts the velocity probe described in Problem 9.5 exactly 60.0 mm from the outside surface of the pipe. If the probe reads 2.48 m/s, compute the actual average velocity of flow, assuming the flow is laminar. Then, check to see if the flow actually is laminar if the fluid is a heavy fuel oil with a kinematic viscosity of 850 centistokes.
Answer Preview: U 2 48 m s d 60 0 mm d r o r t r r o t d 73 15 10 …

, Chapter: 8 -Problem: 5 >> Determine the smallest metric hydraulic copper tube size that will carry 4 L/min of the following fluids while maintaining laminar flow:(a) Water at 40°C,(b) Gasoline (sg = 0.68) 25°C,(c) Ethyl alcohol (sg = 0.79) at 0°C,(d) Heavy fuel oil at 25°C.
Answer Preview: Tube sizes Appendix 6 2 a 80 mm …

, Chapter: 18 -Problem: 35 >> Repeat Problem 18.34 at internal pressures of 45 psig through 0 psig in 5.0-psig decrements. Plot a graph of weight flow rate versus the internal pressure in the tire.Repeat ProblemA high-performance racing tire is charged with nitrogen at 50 psig and 70°F. At what weight flow rate would the nitrogen escape through a valve with a diameter of 0.062 in into the atmosphere at a pressure of 14.60 psia
Answer Preview: Use data from Problem 18 34 P psig W x 10 b s 188 4…

, Chapter: 10 -Problem: 32 >> Calculate the resistance coefficient K for a ball-type check valve placed in a 2-in Schedule 40 steel pipe if water at 100°F is flowing with a velocity of 10 ft/s.
Answer Preview: Ball type check valve …

, Chapter: 1 -Problem: 48 >> A coining press is used to produce commemorative coins with the likenesses of all the U.S. presidents. The coining process requires a force of 18000 lb. The hydraulic cylinder has a diameter of 2.50 in. Compute the required oil pressure.
Answer Preview: p F A …

, Chapter: 8 -Problem: 23 >> The water line described in Problem 8.22 was a cold water distribution line. At another point in the system, the same-size tube delivers water at 180°F. Compute the range of volume flow rates for which the flow would be in the critical region. Distribution The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets
Answer Preview: Q 2 2Q 1 0 3362 gal min V NV …

, Chapter: 16 -Problem: 15 >> A reducer connects a standard 6-in Schedule 40 pipe to a 3-in Schedule 40 pipe. The walls of the conical reducer are tapered at an included angle of 40. The flow rate of water is 500 gal/min and the pressure ahead of the reducer is 125 psig. Considering the energy loss in the reducer, calculate the force exerted on the reducer by the water.
Answer Preview: From Section 10 8 Q 500 gal min x 1 114 ft s…

, Chapter: 11 -Problem: 1 >> Water at 10°C flows from a large reservoir at the rate of 1.5 × 10-2 m3/s through the system shown in Fig. 11.13. Calculate the pressure at B.
Answer Preview: Class I Pt A at tank surface N R vD …

, Chapter: 3 -Problem: 38 >> A water storage tank is on the roof of a factory building and the surface of the water is 50.0 ft above the floor of the factory. If a pipe connects the storage tank to the floor level and the pipe is full of static water, what is the pressure in the pipe at floor level?
Answer Preview: p yh 62 4 …

, Chapter: 8 -Problem: 74 >> A pipeline is needed to transport medium fuel oil at 77°F. The pipeline needs to traverse 80 mi in total, and the initial proposal is to space pumping stations 2 mi apart. The line needs to carry 750 gal/min and would be made of 6-in Schedule 80 steel pipe. Calculate the pressure drop between stations and the power required to maintain the same pressure at the inlet of each pump. Comment on the de
Answer Preview: Q AxVv Q NR VxD V P V Y 2g gal 1 ft 750 X min 7 48 gal 0 181 ft A ft 9 2 x 0 …

, Chapter: 19 -Problem: 2 >> Repeat Problem 19.1 for duct diameters of 16, 14, 12, and 10 in. Then plot the velocity and friction loss versus duct diameter.Repeat ProblemDetermine the velocity of flow and the friction loss as 1000 cfm of air flows through 75 ft of an 18-in-diameter round duct.
Answer Preview: Duct size 16 in 14 in 12 in 10 in ft min …

, Chapter: 10 -Problem: 66 >> A 3-in plastic diaphragm valve carries 300 gal/min of gasoline at 77°F. Compute the expected pressure drop across the valve.
Answer Preview: p sg Q …

, Chapter: 1 -Problem: 65 >> Repeat Problem 1.63 but change the cylinder diameter to 2.00 in. Compare the results.Repeat ProblemA measure of the stiffness of a linear actuator system is the amount of force required to cause a certain linear deflection. For an actuator that has an inside diameter of 0.50 in and a length of 42.0 in and that is filled with machine oil, compute the stiffness in lb/in.
Answer Preview: F AL EA 189000 …

, Chapter: 9 -Problem: 3 >> Compute points on the velocity profile from the tube wall to the centerline of a plastic pipe, 125 mm OD × 7.4 mm wall, if the volume flow rate of gasoline (sg = 0.68) at 25°C is 3.0 L/min. Use increments of 8.0 mm and include the velocity at the centerline.
Answer Preview: Local velocity U 2v 1 r r o 2 Q 3 0 L min 5 0 10 5 …

, Chapter: 19 -Problem: 18 >> A part of a duct system is a 10-by-22-in rectangular main duct carrying 1600 cfm of air. A tee to a branch duct, 10 × 10 in, draws 500 cfm from the main. The main duct remains the same size downstream from the branch. Determine the velocity of flow and the velocity pressure in all parts of the duct.
Answer Preview: 10 22 15 9 in circ equiv 10 10 10 …

, Chapter: 10 -Problem: 62 >> A 1½-in plastic butterfly valve carries 60 gal/min of carbon tetrachloride at 77°F. Compute the expected pressure drop across the valve.
Answer Preview: p sg Q …

, Chapter: 1 -Problem: 117 >> A standard pump design can be upgraded to higher efficiency for an additional capital investment of $17,000. What is the period for payback if the upgrade saves 7500 $/year?
Answer Preview: 17 000 7500 …

, Chapter: 9 -Problem: 22 >> Air with a specific weight of 12.5 N/m3and a dynamic viscosity of 2.0 × 10-5Paˆ™s flows through the shaded portion of the duct shown in Fig. 9.16 at the rate of 150 m3/h. Calculate the Reynolds number of the flow. Transcribed Image Text: 100 mm 50 mm 25-mm outside diameter 50 mm
Answer Preview: A 0 05 m 2 0 5 0 05 m 2 0 025 m 2 4 3 259 10 3 m 2 WP 0 …

, Chapter: 19 -Problem: 6 >> Specify a diameter for a round duct suitable for carrying 0.40 m3/s of air with a maximum pressure drop of 1.00 Pa/m of duct, rounding up to the next 50-mm increment. For the actual size specified, give the friction loss in Pa/m.
Answer Preview: Q 0 40 m …

, Chapter: 1 -Problem: 27 >> Calculate the kinetic energy in N?m of a 75-kg box moving on a conveyor at 6.85 m/s.The formula for kinetic energy is KE = ½ mv2, where m = mass and v = velocity.
Answer Preview: KE 2 mv 75 …

, Chapter: 10 -Problem: 42 >> Specify the radius in mm to the centerline of a 90 bend in a 25 mm OD × 2.0 mm wall copper tube to achieve the minimum energy loss. For such a bend carrying 250 L/min of water at 80°C, compute the energy loss. Compare the results with those of Problem 10.41.In ProblemA 25 mm OD × 2.0 mm wall copper tube supplies hot water (80°C) to a washing system in a factory at a flow rate of 250 L/min. At sev
Answer Preview: Pipe bend See Prob 10 41 for so…

, Chapter: 3 -Problem: 19 >> Require that you convert the given pressure from gage to absolute pressure or from absolute to gage pressure as indicated. The value of the atmospheric pressure is given.Given Pressure             P atm               Express Result As: 284 kPa(gage).............100 kPa(abs)........Absolute pressure
Answer Preview: p abs…

, Chapter: 9 -Problem: 31 >> Glycerin (sg = 1.26) at 40°C flows in the portion of the duct outside the square tubes shown in Fig. 9.21. Calculate the Reynolds number for a flow rate of 0.10 m3/s. Transcribed Image Text: Both 150 mm square outside -300 mm 450 mm-
Answer Preview: A 0 45 0 30 0 30 2 4 2 0 15 2 0 1607 m …

, Chapter: 14 -Problem: 2 >> A rectangular channel has a bottom width of 2.75 m. Compute the hydraulic radius when the fluid depth is 0.50 m.
Answer Preview: R A Wd WP W …

, Chapter: 2 -Problem: 49 >> What grades of SAE oil are suitable for lubricating the crankcases of engines?
Answer Preview: SAE 0W through SAE 60 for engine crankcase oils depending on operating conditions …

, Chapter: 10 -Problem: 35 >> Repeat Problem 10.34 for a street elbow.Repeat ProblemDetermine the pressure drop across a 90 standard elbow in a DN 65 Schedule 40 steel pipe if water at 15°C is flowing at the rate of 750 L/min.
Answer Preview: Street elbo…

, Chapter: 3 -Problem: 42 >> Figure 3.20 shows a clothes washing machine. The pump draws fluid from the tub and delivers it to the disposal sink. Compute the pressure at the inlet to the pump when the water is static (no flow). The soapy water solution has a specific gravity of 1.15. Transcribed Image Text: Tub Sink 375 mm Pump
Answer Preview: p i h 1 …

, Chapter: 8 -Problem: 41 >> Water at 10°C flows at the rate of 900 L/min from the reservoir and through the pipe shown in Fig. 8.16. Compute the pressure at point B, considering the energy loss due to friction, but neglecting other losses.
Answer Preview: 2 2g PB Z ZB P Vw NR h PB V h f UB 28 V 1 3010 L v D 2g PB 9 8…

, Chapter: 18 -Problem: 38 >> For the conditions of Problem 18.37, compute the magnitude of the sonic velocity in the nozzle.In ProblemAir flows from a large tank through a smooth convergent nozzle into the atmosphere, where the pressure is 98.5 kPa absolute. The temperature in the tank is 95°C. Compute the minimum pressure in the tank required to produce sonic velocity in the nozzle.
Answer Preview: 2 1 p 2 p 1 1 k 17 36 0 528 1 …

, Chapter: 1 -Problem: 41 >> A pitcher has an ERA of 2.79 runs/game and has allowed 40 earned runs. How many innings have been pitched?One measure of a baseball pitcher’s performance is earned run average or ERA. It is the average number of earned runs allowed if all the innings pitched were converted to equivalent nine-inning games. Therefore, the units for ERA are runs per game.
Answer Preview: 1 game 9 in…

, Chapter: 10 -Problem: 30 >> Determine the equivalent length in meters of pipe of a fully open globe valve placed in a DN 250 Schedule 40 pipe.
Answer Preview: DN 250 Sch 40 pi…

, Chapter: 3 -Problem: 8 >> The pressure in a certain tank is ?55.8 Pa(abs).Are (or can be) true or false. For those that are false, explain why.
Answer Preview: False Absolute pressure cannot …

, Chapter: 6 -Problem: 15 >> Convert 459 gal/min to ft3/s.
Answer Preview: Q 459 gal …

, Chapter: 16 -Problem: 30 >> Repeat Problem 16.29 with the blade rotating as a part of the wheel at a radius of 200 mm and with a linear tangential velocity of 10 m/s. Also, compute the rotational speed of the wheel in rpm.Repeat ProblemFigure 16.23 is a sketch of a turbine in which the incoming stream of water at 15°C has a diameter of 7.50 mm and is moving with a velocity of 25 m/s. Compute the force on one blade of the tur
Answer Preview: Compute the force on one blade when the turbine wheel is rotating and has a tangential velocity of 1…

, Chapter: 2 -Problem: 29 >> Glycerin at 110°F.Appendix D gives dynamic viscosity for a variety of fluids as a function of temperature. Using this appendix, give the value of the viscosity for the following fluids
Answer Preview: 41 …

, Chapter: 10 -Problem: 48 >> Compute the energy loss in a 90 bend in a steel tube used for a fluid power system. The tube has a 1¼-in OD and a wall thickness of 0.083 in. The mean bend radius is 3.25 in. The flow rate of hydraulic oil is 27.5 gal/min.
Answer Preview: 90 Bend Steel tube in OD 0 083 in wall thickness r 3 25 in D 1 084 in 0 09033 …

, Chapter: 1 -Problem: 114 >> What is the required rate, in N/min, to empty a tank containing 80 N of fluid in 5 s?
Answer Preview: 80 N Flo…

, Chapter: 9 -Problem: 45 >> If the heat sink described in Problem 9.33 is 105 in long, compute the pressure drop for the water. Use ? = 2.5 × 10-5 ft for the aluminum.
Answer Preview: Data from Prob 9 33 and Fig 9 22 N R 1 112 10 …

, Chapter: 19 -Problem: 25 >> A section of duct system consists of 38 ft of straight 12-by-20-in rectangular duct, a wide-open damper, three smooth 90 elbows, and an outlet grille. Compute the pressure drop along this duct section for Q = 1500 cfm.
Answer Preview: 12 20 rect 16 8 in Circ Eq use Q 1500 cfm u 980 ft min Dam…

, Chapter: 2 -Problem: 63 >> In a falling-ball viscometer, a steel ball with a diameter of 0.063 in is allowed to fall freely in a heavy fuel oil having a specific gravity of 0.94. Steel weighs 0.283 lb/in3. If the ball is observed to fall 10.0 in in 10.4 s, calculate the dynamic viscosity of the oil in lb?s2 /ft.
Answer Preview: See Prob 261 t 094624 lbft 3 587 lbft 3 D 0063 …

, Chapter: 10 -Problem: 23 >> Determine the energy loss for a gradual contraction from a 4-in Schedule 80 steel pipe to a 1½-in Schedule 80 pipe for a flow rate of 250 gal/min. The cone angle for the contraction is 76°.
Answer Preview: Data from Prob …

, Chapter: 3 -Problem: 51 >> A storage tank for sulfuric acid is 1.5 m in diameter and 4.0 m high. If the acid has a specific gravity of 1.80, calculate the pressure at the bottom of the tank. The tank is open to the atmosphere at the top.
Answer Preview: p h 1 80 9…

, Chapter: 8 -Problem: 24 >> In a dairy, milk at 100°F is reported to have a kinematic viscosity of 1.30 centistokes. Compute the Reynolds number for the flow of the milk at 45 gal/min through a 1¼-in steel tube with a wall thickness of 0.065 in.
Answer Preview: v 1 30 cs X Q 45 gal min x V Q A …

, Chapter: 16 -Problem: 16 >> Calculate the force on a 45 elbow attached to an 8-in Schedule 80 steel pipe carrying water at 80F at 6.5 ft3/s. The outlet of the elbow discharges into the atmosphere. Consider the energy loss in the elbow.
Answer Preview: Find p 1 p 2 0 v 1 v 2 z 1 z 2 f T 0 014 Table 1…

, Chapter: 2 -Problem: 26 >> Air at 40°F.Appendix D gives dynamic viscosity for a variety of fluids as a function of temperature. Using this appendix, give the value of the viscosity for the following fluids
Answer Preview: 36 …

, Chapter: 11 -Problem: 44 >> Repeat Problem 11.43, except consider that there will be the following elements added to the system: –  A fully open gate value near the water main –  A fully open butterfly valve near the green (but before point B) –  Three standard 90 elbows –  Two standard 45 elbows –  One swing-type check valveRepeat ProblemFigure 11.32 shows a pipe delivering water to the putting green on a golf course. The
Answer Preview: APPLIED FLUID MECHANICS Objective Minimum pipe diameter Problem 11 43 and 11 44 Figure 11 32 Water at 60F System Data SI Metric Units Pressure at poin…

, Chapter: 3 -Problem: 49 >> For the tank in Fig. 3.22, compute the depth of the water if the depth of the oil is 6.90 m and the gage at the bottom of the tank reads 125.3 kPa(gage). Transcribed Image Text: Vent Oil (sg = 0.86) h2 Water
Answer Preview: 0 oho Ywhw Phot …

, Chapter: 6 -Problem: 17 >> Convert 2500 gal/min to ft3/s.
Answer Preview: Q 2500 ga…

, Chapter: 19 -Problem: 13 >> Specify a size for a rectangular duct suitable for carrying 300 cfm of air with a maximum pressure drop of 0.10 inH2O per 100 ft of duct. The maximum vertical height of the duct is 6.0 in.
Answer Preview: Q 300 cfm h Lm…

, Chapter: 2 -Problem: 59 >> Convert a viscosity measurement of 6.5 × 10-3 Pa?s into the units of lb?s/ft2.
Answer Preview: 65 10 3 Pa…

, Chapter: 10 -Problem: 2 >> Determine the energy loss due to a sudden enlargement from a standard DN 25 Schedule 80 steel pipe to a DN 90 mm Schedule 80 steel pipe when the rate of flow is 3 × 10-3 m3/s.
Answer Preview: V Q3 010 m s A 4 6361…

, Chapter: 1 -Problem: 102 >> Glycerin has a specific gravity of 1.258. How much would 50 gal of glycerin weigh?
Answer Preview: w 1 258 6…

, Chapter: 9 -Problem: 9 >> For the flow of 12.9 L/min of water at 75°C in a plastic pipe, 16 mm OD × 1.5 mm wall, compute the expected maximum velocity of flow from Eq. (9€“4). Transcribed Image Text: + 1.43 V) Umax = v(1 %3D
Answer Preview: NR D U Q 12 9 L min 1m s A 1 32…

, Chapter: 17 -Problem: 3 >> Determine the terminal velocity (see Section 2.6.4, Chapter 2 ) of a 75-mm-diameter sphere made of solid aluminum (specific weight = 26.6 kN/m3) in free fall in (a) castor oil at 25°C, (b) water at 25°C, and (c) air at 20°C and standard atmospheric pressure. Consider the effect of buoyancy.
Answer Preview: For equilibrium F D w F b at terminal velocity w V D 3 6 26 6 kN m 3 …

, Chapter: 2 -Problem: 61 >> In a falling-ball viscometer, a steel ball 1.6 mm in diameter is allowed to fall freely in a heavy fuel oil having a specific gravity of 0.94. Steel weighs 77 kN/m3. If the ball is observed to fall 250 mm in 10.4 s, calculate the viscosity of the oil.
Answer Preview: Y yD 18v 7 Eq 210 Y094981 kNm …

, Chapter: 10 -Problem: 46 >> Figure 10.38 shows a test setup for determining the energy loss due to a heat exchanger. Water at 50°C is flowing vertically upward at 6.0 × 10-3 m3/s. Calculate the energy loss between points 1 and 2. Determine the resistance coefficient for the heat exchanger based on the velocity in the inlet tube.
Answer Preview: Manometer p 1 w 0 25 m m 0 35 m w 1 10 m p 2 Then h L 5 65 1 20 0 643 0 0397 5 05 m Let …

, Chapter: 3 -Problem: 11 >> If you were to ride in an open-cockpit airplane to an elevation of 4000 ft above sea level, what would the atmospheric pressure be if it conforms to the standard atmosphere?
Answer Preview: At 4000 ft…

, Chapter: 8 -Problem: 30 >> A 3-in Schedule 40 steel pipe is 5000 ft long and carries a lubricating oil between two points A and B such that the Reynolds number is 800. Point B is 20 ft higher than A. The oil has a specific gravity of 0.90 and a dynamic viscosity of 4 × 10-4 lb - s/ft2. If the pressure at A is 50 psig, calculate the pressure at B.
Answer Preview: D DA 28 PA ZA Y PB PA 1 ZA ZB h 800 410 NR …

, Chapter: 19 -Problem: 10 >> A heating duct for a forced-air furnace measures 250 × 500 mm. Compute the circular equivalent diameter. Then determine the maximum flow rate of air that the duct could carry while limiting the friction loss to 0.80 Pa/m.
Answer Preview: 250 500 mm duct f…

, Chapter: 1 -Problem: 28 >> Calculate the mass of a body in kg if it has a kinetic energy of 38.6 N?m when moving at 31.5 km/h.The formula for kinetic energy is KE = ½ mv2, where m = mass and v = velocity.
Answer Preview: m m 2KE 2386 N m …

, Chapter: 3 -Problem: 47 >> For the tank shown in Fig. 3.21, determine the depth of the oil h if the reading of the bottom pressure gage is 35.5 psig, the top of the tank is sealed, and the top gage reads 30.0 psig. Transcribed Image Text: Air Oil (sg = 0.95)
Answer Preview: Phot Ptop 35 5 3…

, Chapter: 8 -Problem: 18 >> Repeat Problem 8.17 for an oil temperature of 0°C.Repeat ProblemRepeat Problem 8.15, except the tube is 50 mm OD × 1.5 mm wall thickness.Repeat ProblemSAE 30 oil (sg = 0.89) is flowing at 45 L/min through a 20 mm OD × 1.2 mm wall hydraulic steel tube. If the oil is at 110°C, is the flow laminar or turbulent?
Answer Preview: NR vDp 0 4…

, Chapter: 19 -Problem: 8 >> A branch duct for a heating system measures 3 × 10 in. Compute the circular equivalent diameter. Then determine the maximum flow rate of air that the duct could carry while limiting the friction loss to 0.10 inH2O per 100 ft.
Answer Preview: 3 10 in duct For h L …

, Chapter: 2 -Problem: 40 >> In the rotating-drum viscometer, describe how the magnitude of the shear stress is measured.
Answer Preview: A meter measures the torque required to drive the rotating …

, Chapter: 2 -Problem: 5 >> State the standard units for dynamic viscosity in the SI system.
Answer Preview: Ns…

, Chapter: 8 -Problem: 17 >> Repeat Problem 8.15, except the tube is 50 mm OD × 1.5 mm wall thickness.Repeat ProblemSAE 30 oil (sg = 0.89) is flowing at 45 L/min through a 20 mm OD × 1.2 mm wall hydraulic steel tube. If the oil is at 110°C, is the flow laminar or turbulent?
Answer Preview: V l 2 45 L min 1 m s …

, Chapter: 17 -Problem: 14 >> A wing on a race car is supported by two cylindrical rods, as shown in Fig. 17.15. Compute the drag force exerted on the car due to these rods when the car is traveling through still air at ˆ’20°F at a speed of 150 mph. Transcribed Image Text: 2.0-in diameter 32 in Rod
Answer Preview: A D L 0 167 ft 64 in 1 ft 12 in 0 889 ft 2 F D 0 8 0 5 2 80 …

, Chapter: 2 -Problem: 22 >> Glycerin at 40°C.Appendix D gives dynamic viscosity for a variety of fluids as a function of temperature. Using this appendix, give the value of the viscosity for the following fluids
Answer Preview: 30…

, Chapter: 1 -Problem: 121 >> At what speed, in rpm, does a single cylinder pump with a 1.0-in diameter piston and a 2.5-in stroke need to be run to provide 20 gal/min of flow?A piston/cylinder arrangement like the one shown in Fig. 1.7 is used to pump liquid. It moves a volume of liquid equal to its displacement, which is the area of the piston face times the length of the stroke, for each revolution of the crank. Perform the
Answer Preview: Volume 7x1in x 2 5 in 4 X 2…

, Chapter: 6 -Problem: 4 >> Convert 84.3 gal/min to m3/s.
Answer Preview: Q 84 3 gal …

, Chapter: 17 -Problem: 5 >> A pitcher throws a baseball without spin with a velocity of 20 m/s. If the ball has a circumference of 225 mm, calculate the drag force on the ball in air at 30°C.
Answer Preview: Circum D 225 mm D 225 mm 71 6 mm A …

, Chapter: 2 -Problem: 32 >> SAE 10 oil at 60°F.Appendix D gives dynamic viscosity for a variety of fluids as a function of temperature. Using this appendix, give the value of the viscosity for the following fluids
Answer Preview: 21 …

, Chapter: 1 -Problem: 64 >> Repeat Problem 1.63 but change the length of the cylinder to 10.0 in. Compare the results.Repeat ProblemA measure of the stiffness of a linear actuator system is the amount of force required to cause a certain linear deflection. For an actuator that has an inside diameter of 0.50 in and a length of 42.0 in and that is filled with machine oil, compute the stiffness in lb/in.
Answer Preview: F EA AL L 189…

, Chapter: 8 -Problem: 45 >> In a chemical processing system, the flow of glycerin at 60F (sg = 1.24) in a copper tube must remain laminar with a Reynolds number approximately equal to but not exceeding 300. Specify the smallest standard Type K copper tube that will carry a flow rate of 0.90 ft3/s. Then, for a flow of 0.90 ft3/s in the tube you specified, compute the pressure drop between two points 55.0 ft apart if the pipe
Answer Preview: 2 in Type K Copper Tube D 0 202…

, Chapter: 16 -Problem: 12 >> Water is piped vertically from below a boat and discharged horizontally in a 4-in diameter jet with a velocity of 60 ft/s. Calculate the force on the boat.
Answer Preview: Force on boat is reaction to R x …

, Chapter: 2 -Problem: 35 >> SAE 30 oil at 210°F.Appendix D gives dynamic viscosity for a variety of fluids as a function of temperature. Using this appendix, give the value of the viscosity for the following fluids
Answer Preview: 22 …

, Chapter: 14 -Problem: 25 >> It is desired to carry 2.00 m3/s of water at a velocity of 3.0 m/s in a rectangular open channel. Compute the depth and hydraulic radius for a range of designs for the channel, with bottom widths of 0.50 m to 2.00 m. Plot depth and hydraulic radius versus bottom width.
Answer Preview: Q Av Wyv y WP W 2y R J T S nQ AR 3 Q Wu A WP 2 00 W 3 0 0 015 2 00 AR2 3 W m 0 50 0 75 1 00 1 25 1 …

, Chapter: 3 -Problem: 34 >> If milk has a specific gravity of 1.08, what is the pressure at the bottom of a milk can 550 mm deep?
Answer Preview: p h 1 08 9…

, Chapter: 8 -Problem: 29 >> Fuel oil is flowing in a 4-in Schedule 40 steel pipe at the maximum rate for which the flow is laminar. If the oil has a specific gravity of 0.895 and a dynamic viscosity of 8.3 × 10-4 lb - s/ft2, calculate the energy loss per 100 ft of pipe.
Answer Preview: Let NR 2000 f 64 N R 0 032 NR …

, Chapter: 17 -Problem: 19 >> An antenna in the shape of a cylindrical rod projects from the top of a locomotive. If the antenna is 42 in long and 0.200 in. in diameter, compute the drag force on it when the locomotive is traveling at 160 mph in still air at -20°F.
Answer Preview: F D 1 30 0 5 2 80 10 3 235 2 0 0583 5 86 …

, Chapter: 2 -Problem: 66 >> A fluid has a kinematic viscosity of 55.3 mm2/s at 100°F. Determine its equivalent viscosity in SUS at that temperature.
Answer Preview: From Fig 214 kinematic viscosity 257 SUS S…

, Chapter: 11 -Problem: 6 >> For the system shown in Fig. 11.18, calculate the vertical distance between the surfaces of the two reservoirs when water at 10°C flows from A to B at the rate of 0.03 m 3 /s. The elbows are standard. The total length of the 3-in pipe is 100 m. For the 6-in pipe it is 300 m. Transcribed Image Text:
Answer Preview: Class I Pts 1 and 2 at reservoir surfaces p 1 p 2 0 …

, Chapter: 1 -Problem: 105 >> Liquid ammonia has a specific gravity of 0.826. Calculate the volume in cm3 that would weigh 5.0 lb.
Answer Preview: V 5 0lb ft …

, Chapter: 8 -Problem: 79 >> Use PIPE-FLO® to model a straight horizontal run of 100 ft of 1-in Schedule 40 pipe carrying 20 gal/min of 75°F water from a tank with a water level of 25 ft. Display the calculated pressure drop in the pipe, Reynolds number, and friction factor on the FLO-Sheet®.
Answer Preview: From PIPE FLO V …

, Chapter: 16 -Problem: 1 >> Calculate the force required to hold a flat plate in equilibrium perpendicular to the flow of water at 25 m/s issuing from a 75-mm-diameter nozzle.
Answer Preview: Q Av 4 S S R pQ v v pQ 0 v …

, Chapter: 2 -Problem: 18 >> Water at 40°C.Appendix D gives dynamic viscosity for a variety of fluids as a function of temperature. Using this appendix, give the value of the viscosity for the following fluids
Answer Preview: 65…

, Chapter: 14 -Problem: 46 >> Repeat the calculations of Q versus H for a weir with the same dimensions as used in Problem 14.45 except that it is placed in a channel wider than 6 ft. It, thus, becomes a contracted weir.In ProblemPlot a graph of Q versus H for a full-width weir with a crest length of 6 ft and whose crest is 2 ft from the channel bottom. Consider values of the head H from 0 to 12 inches in 2-in steps.
Answer Preview: Q 3 27 0 40 …

, Chapter: 1 -Problem: 72 >> Calculate the mass of 1 ft3 of gasoline if it weighs 42.0 lb.
Answer Preview: m 42 0 …

, Chapter: 9 -Problem: 17 >> Repeat Problem 9.16 for the same conditions, except that the inside of the pipe is roughened by age so that ? = 5.0 × 10-3. Plot the results on the same graph as that used for the results of Problem 9.16. Repeat ProblemUsing Eq. (9-3), compute several points on the velocity profile for the flow of 400 gal/min of water at 50F in a new, clean, 4-in Schedule 40 steel pipe. Make a plot similar to Fig.
Answer Preview: U 10 08 1 299 0 449 log …

, Chapter: 19 -Problem: 22 >> Repeat Problem 19.21, but use a mitered elbow.Repeat ProblemCompute the pressure drop as 0.20 m3/s of air flows through a three-piece 90° elbow in a 200-mm-diameter round duct.
Answer Preview: Mitered …

, Chapter: 2 -Problem: 21 >> Hydrogen at 40°C.Appendix D gives dynamic viscosity for a variety of fluids as a function of temperature. Using this appendix, give the value of the viscosity for the following fluids
Answer Preview: 11…

, Chapter: 13 -Problem: 37 >> Figure 13.52 shows that a mixed-flow pump is recommended for delivering 10 000 gal/min of water at a head of 40 ft. If such a pump operates with a specific speed of 5000, compute the appropriate operating speed of the pump. Transcribed Image Text: Flow (m3/h) 2.3 100 000 23 230 2300 23 000 30 000 Re
Answer Preview: NO N 3 4 …

, Chapter: 1 -Problem: 45 >> Compute the pressure produced in the oil in a closed cylinder by a piston exerting a force of 12.0 kN on the enclosed oil. The piston has a diameter of 75 mm.
Answer Preview: F A 12 0 kN …

, Chapter: 9 -Problem: 16 >> Using Eq. (9-3), compute several points on the velocity profile for the flow of 400 gal/min of water at 50°F in a new, clean, 4-in Schedule 40 steel pipe. Make a plot similar to Fig. 9.7 with a fairly large scale.Figure 9.7 Transcribed Image Text: - 1.111 m/s max Pipe centerline 25 20 15 10 Pipe wal
Answer Preview: V 1 ft s 0 0884 ft 449 gal min Q400 gal min vD 10 08 0 3355 1 4010 10 08 ft s D NR E U v 1 1 430 01…

, Chapter: 17 -Problem: 6 >> A parachute in the form of a hemispherical cup 1.5 m in diameter is deployed from a car trying for the land speed record. Determine the force exerted on the car if it is moving at 1100 km/h in air at atmospheric pressure and 20°C.
Answer Preview: F D Drag force F R Force on car C D …

, Chapter: 2 -Problem: 28 >> Glycerin at 60°F.Appendix D gives dynamic viscosity for a variety of fluids as a function of temperature. Using this appendix, give the value of the viscosity for the following fluids
Answer Preview: 50 …

, Chapter: 14 -Problem: 43 >> Determine the maximum possible flow rate over a 60°V-notch weir if the width of the notch at the top is 12 in.
Answer Preview: H max 6 in tan 30 10 …

, Chapter: 2 -Problem: 51 >> If you were asked to check the viscosity of an oil that is described as SAE 40, at what temperatures would you make the measurements?
Answer Preview: From Internet resource 19 100C using ASTM D …

, Chapter: 9 -Problem: 36 >> The blade of a gas turbine engine contains internal cooling passages, as shown in Fig. 9.25. Compute the volume flow rate of air required to produce an average velocity of flow in each passage of 25.0 m/s. The air flow distributes evenly to all six passages. Then, compute the Reynolds number if the air has a density of 1.20 kg/m3and a dynamic viscosity of 1.50 × 10-5Paˆ™s.
Answer Preview: A 2 8 16 mm 2 1 m 2 10 6 mm 2 1 60 10 …

, Chapter: 18 -Problem: 33 >> Repeat Problem 18.32, but change the pressure in the tank to 7.50 psig.Repeat ProblemOxygen is discharged from a tank in which the pressure is 125 psig and the temperature is 75F through a nozzle with a diameter of 0.120 in. The oxygen flows into the atmosphere, where the pressure is 14.40 psia. Compute the weight flow rate from the tank and the velocity of flow through the nozzle.
Answer Preview: p 1 7 50 psig 14 40 psia 21 9 psia 144 in 2 ft 2 3154 lb …

, Chapter: 1 -Problem: 26 >> Calculate the kinetic energy in N?m of a 3600-kg truck moving at 16 km/h.The formula for kinetic energy is KE = ½ mv2, where m = mass and v = velocity.
Answer Preview: KE mv 3600 kg 2 …

, Chapter: 14 -Problem: 49 >> For a Parshall flume with a throat width of 9 in, calculate the head H corresponding to the minimum and maximum flows.
Answer Preview: Q 3 07 H 1 53 H 1 53 Q 3 07 H Q …

, Chapter: 1 -Problem: 116 >> A tank that is 2 ft in diameter and 18 in tall is to be filled with a fluid in 90 s. Determine the required fill rate in gal/min.
Answer Preview: Volume Time Flow …

, Chapter: 6 -Problem: 16 >> Convert 20 gal/min to ft3/s.
Answer Preview: Q 20 gal m…

, Chapter: 16 -Problem: 27 >> Figure 16.22 shows a device for clearing debris using a 1½-in-diameter jet of air issuing from a blower nozzle. As shown, the jet is striking a rectangular box-shaped object sitting on a floor. If the air velocity is 25 ft/s and the entire jet is deflected by the box, what is the heaviest object that could be moved? Assume that the box slides rather than tumbling over and that the coefficient of f
Answer Preview: Maximum F f W 0 …

, Chapter: 1 -Problem: 37 >> Calculate the velocity in ft/s of a 30-lb object if it has a kinetic energy of 10 ft-lb.The formula for kinetic energy is KE = ½ mv2, where m = mass and v = velocity.
Answer Preview: V 2g KE …

, Chapter: 14 -Problem: 22 >> For a rectangular channel with a bottom width of 1.00 m, compute the flow area and hydraulic radius for depths ranging from 0.10 m to 2.0 m. Plot a graph of area and hydraulic radius versus depth.
Answer Preview: A 1 00 y WP 1 00 2y R y 1 2y y m A m R m 0 …

, Chapter: 1 -Problem: 111 >> A rock has a specific gravity of 2.32 and a volume of 8.64 in3. How much does it weigh?
Answer Preview: w WV 2 32 …

, Chapter: 8 -Problem: 20 >> After the press has run for some time, the lubricating oil described in Problem 8.19 heats to 212°F. Compute the Reynolds number for the oil flow at this temperature. Discuss the possible operating difficulty as the oil heats up.In ProblemThe lubrication system for a punch press delivers 1.65 gal/min of a light lubricating oil (see Appendix C) through 5/16-in steel tubes having a wall thickness of
Answer Preview: Changing from laminar flow through critical z…

, Chapter: 19 -Problem: 19 >> For the conditions of Problem 19.18, estimate the loss in pressure as the flow enters the branch duct through the tee.In ProblemA part of a duct system is a 10-by-22-in rectangular main duct carrying 1600 cfm of air. A tee to a branch duct, 10 × 10 in, draws 500 cfm from the main. The main duct remains the same size downstream from the branch. Determine the velocity of flow and the velocity pressu
Answer Preview: Tee flow in …

, Chapter: 2 -Problem: 31 >> Mercury at 210°F.Appendix D gives dynamic viscosity for a variety of fluids as a function of temperature. Using this appendix, give the value of the viscosity for the following fluids
Answer Preview: 28 …

, Chapter: 13 -Problem: 36 >> For the 6 × 8 - 17 centrifugal pump performance curve shown in Fig. 13.32, determine the capacity that can be expected from a pump with a 15-in impeller operating against a system head of 200 ft. Then, compute the specific speed and specific diameter and locate the corresponding point on Fig. 13.53. Transcribed Image Text:
Answer Preview: Point in Figure 13 34 lies in rad…

, Chapter: 3 -Problem: 3 >> Define gage pressure.
Answer Preview: Gage pressu…

, Chapter: 8 -Problem: 32 >> As a test to determine the effective wall roughness of an existing pipe installation, water at 10°C is pumped through it at the rate of 225 L/min. The pipe is standard steel tubing, 40 mm OD × 2.0 mm wall. Pressure gages located at 30 m apart in a horizontal run of the pipe read 1035 kPa and 669 kPa. Determine the effective pipe wall roughness.
Answer Preview: From Prob 8 31 p 1 p 2 w h L h L p 1 p 2 w h f V 1035 …

, Chapter: 18 -Problem: 31 >> Refrigerant 12 expands adiabatically from 35.0 psig at a temperature of 60°F to 3.6 psig. Compute the specific weight of the refrigerant at both conditions.
Answer Preview: p 1 35 0 psig 14 7 psia 49 7 psia R12 T 1 …

, Chapter: 2 -Problem: 9 >> State the mathematical definition for kinematic viscosity.
Answer Preview: Kinematic v…

, Chapter: 10 -Problem: 37 >> A simple heat exchanger is made by installing a close return bend on two ½-in Schedule 40 steel pipes as shown in Fig. 10.32. Compute the pressure difference between the inlet and the outlet for a flow rate of 12.5 gal/min of ethylene glycol at 77°F. Transcribed Image Text: 5-in Schedule 40 pipe Flo
Answer Preview: Pt 1 at inlet Pt 2 at out…

, Chapter: 13 -Problem: 39 >> Compute the specific speed for a pump operating at 1750 rpm delivering 12 000 gal/min of water at a total head of 300 ft.
Answer Preview: N N H …

, Chapter: 1 -Problem: 52 >> The maximum pressure that can be developed for a certain fluid power cylinder is 15.0 MPa. Compute the required diameter for the piston if the cylinder must exert a force of 30 kN.
Answer Preview: D 4F 4 3010 …

, Chapter: 6 -Problem: 12 >> Convert 0.105 m3/s to L/min.
Answer Preview: Q 0 105 m …

, Chapter: 15 -Problem: 14 >> A pitot-static tube is inserted into a duct carrying air at standard atmospheric pressure and a temperature of 50°C. A differential manometer reads 4.8 mm of water. Calculate the velocity of flow.
Answer Preview: Pitot static tube carrying a…

, Chapter: 2 -Problem: 37 >> If you want to choose a fluid that exhibits a small change in viscosity as the temperature changes, would you choose one with a high VI or a low VI?
Answer Preview: High…

, Chapter: 10 -Problem: 67 >> A 6-in plastic diaphragm valve carries 1500 gal/min of liquid propane at 77°F. Compute the expected pressure drop across the valve.
Answer Preview: p sg Q …

, Chapter: 11 -Problem: 5 >> Oil is flowing at the rate of 0.015 m3/s in the system shown in Fig. 11.17. Data for the system are as follows: –  Oil specific weight = 8.80 kN/ m3 –  Oil kinematic viscosity = 2.12 × 10ˆ’5m2/s –  Length of DN 150 pipe = 180 m –  Length of DN 50 pipe = 8 m–  Elbows are long-radius type –  Pressure at B = 12.5 MPaConsidering all pipe friction and minor losses, calculate the pressure at A.
Answer Preview: Class I …

, Chapter: 3 -Problem: 35 >> The pressure in an unknown fluid at a depth of 4.0 ft is measured to be 1.820 psig. Compute the specific gravity of the fluid.
Answer Preview: p h sg w h s…

, Chapter: 6 -Problem: 22 >> Convert 0.008 ft3/s to gal/min.
Answer Preview: Q 0 08 ft …

, Chapter: 19 -Problem: 5 >> Repeat Problem 19.4 for duct diameters of 600, 700, 800, 900, and 1000 mm. Then plot the velocity and friction loss versus duct diameter.Repeat ProblemDetermine the velocity of flow and the friction loss as 3.0 m3/s of air flows through 25 m of a 500-mm-diameter round duct.
Answer Preview: 25 m of duct 3 0 m 3 s flow Duct …

, Chapter: 2 -Problem: 25 >> Water at 150°F.Appendix D gives dynamic viscosity for a variety of fluids as a function of temperature. Using this appendix, give the value of the viscosity for the following fluids
Answer Preview: 89 …

, Chapter: 11 -Problem: 43 >> Figure 11.32 shows a pipe delivering water to the putting green on a golf course. The pressure in the main is at 80 psig and it is necessary to maintain a minimum of 60 psig at point B to adequately supply a sprinkler system. Specify the required size of Schedule 40 steel pipe to supply 0.50 ft3/s of water at 60°F. Transcr
Answer Preview: APPLIED FLUID MECHANICS Objective Minimum pipe diameter Problem 11 43 and 11 44 Figure 11 32 Water at 60F System Data SI Metric Units Pressure at poin…

, Chapter: 13 -Problem: 25 >> For the 2 × 3 - 10 centrifugal pump performance curve shown in Fig. 13.28, describe the performance that can be expected from a pump with an 8-in impeller operating against a system head of 200 ft. Give the expected capacity, the power required, the efficiency, and the required NPSH. Transcribed Image Text:
Answer Preview: Q 230 ga…

, Chapter: 2 -Problem: 55 >> Using the data from Table 2.5, report the minimum, nominal, and maximum values for viscosity for ISO grades VG 10, VG 65, VG 220, and VG 1000. Transcribed Image Text: Kinematic Viscosity at 40°C (cSt) or (mm2/s) Grade ISO VG Nominal Minimum Maximum 2.40 2.2 1.98 3 3.2 2.88 3.52 4.6 4.14 5.06 7.48 6.
Answer Preview: From Table 2 5 Viscosities at 40…

, Chapter: 9 -Problem: 51 >> A simple heat exchanger is made by welding one-half of a 1¾-in drawn steel tube to a flat plate as shown in Fig. 9.30. Water at 40°F flows in the enclosed space and cools the plate. Compute the volume flow rate required so that the Reynolds number of the flow is 3.5 × 104. Then, compute the energy loss over a length of 92 in.
Answer Preview: Given Water at 40F N R 3 5 10 4 Figure 9 30 Section is s…

, Chapter: 16 -Problem: 9 >> A stream of non-flammable oil (sg  0.90) is directed onto the center of the underside of a flat metal plate to keep it cool during a welding operation. The plate weighs 550 N. If the stream is 35 mm in diameter, calculate the velocity of the stream that will lift the plate. The stream strikes the plate perpendicularly.
Answer Preview: R 550 N 550 kg m s PQ v v …

, Chapter: 2 -Problem: 64 >> A capillary type viscometer similar to that shown in Fig. 2.7 is being used to measure the viscosity of an oil having a specific gravity of 0.90. The following data apply:Tube inside diameter = 0.100 in = D Length between manometer taps = 12.0 in = L Manometer fluid = mercury Manometer deflection = 7.00 in = h Velocity of flow = 4.82 ft/s = vDetermine the dynamic viscosity of the oil in lbˆ™s2 /ft
Answer Preview: See Problem 262 Use m 8449 lbft 3 App B o 090 624 lbft …

, Chapter: 10 -Problem: 21 >> Determine the energy loss for a gradual contraction from a DN 125 Schedule 80 steel pipe to a DN 50 Schedule 80 pipe for a flow rate of 500 L/min. The cone angle for the contraction is 105°.
Answer Preview: From Prob 10 20 v …

, Chapter: 14 -Problem: 27 >> A trapezoidal channel has a bottom width of 2.00 ft and a pitch of its sides of z = 1.50. Compute the flow area and hydraulic radius for a depth of 20 in.
Answer Preview: From Table 14 2 A b zy y 2 00 1 5 …

, Chapter: 1 -Problem: 71 >> Calculate the mass of 1 gal of oil if it weighs 7.8 lb.
Answer Preview: 7 8lb g 3…

, Chapter: 6 -Problem: 10 >> Convert 23.5 cm3/s to m3/s.
Answer Preview: Q 23 5 c…

, Chapter: 19 -Problem: 14 >> Compute the pressure drop as 650 cfm of air flows through a three-piece 90  elbow in a 12-in-diameter round duct.
Answer Preview: Q 650 cfm D 12 in round u 8…

, Chapter: 2 -Problem: 44 >> Describe the basic features of the Saybolt Universal viscometer.
Answer Preview: The Saybolt viscometer employs a container in which the fluid ca…

, Chapter: 10 -Problem: 43 >> The inlet and the outlet shown in Fig. 10.36 (a) are to be connected with a 50 mm OD × 2.0 mm wall copper tube to carry 750 L/min of propyl alcohol at 25°C. Evaluate the two schemes shown in parts (b) and (c) of the figure with regard to the energy loss. Include the losses due to both the bend and the friction in the straight tube.Figure 10.36
Answer Preview: Proposal 1 Pipe bend Tub…

, Chapter: 11 -Problem: 7 >> A liquid refrigerant flows through the system, shown in Fig. 11.19, at the rate of 1.70 L/min. The refrigerant has a specific gravity of 1.25 and a dynamic viscosity of 3 × 10ˆ’4Pa·s. Calculate the pressure difference between points A and B. The hydraulic tube is drawn steel, with an outside diameter (OD) of 15 mm, a wall thickness of 1.5 mm, and a total length of 30 m.
Answer Preview: Class I Tube Data 15 mm OD 1 50 mm wall D 12 mm 0 012 m A 1 131 10 4 m 2 p A p B 1 …

, Chapter: 3 -Problem: 14 >> Require that you convert the given pressure from gage to absolute pressure or from absolute to gage pressure as indicated. The value of the atmospheric pressure is given.Given Pressure             P atm               Express Result As: 583 kPa(abs).............103 kPa(abs)................Gage pressure
Answer Preview: p gag…

, Chapter: 9 -Problem: 23 >> Carbon dioxide with a specific weight of 0.114 lb/ft3and a dynamic viscosity of 3.34 × 10-7lb-s/ft2flows in the shaded portion of the duct shown in Fig. 9.17. If the volume flow rate is 200 ft3/min, calculate the Reynolds number of the flow. Transcribed Image Text: 4-in outside diameter 6 in Z77777
Answer Preview: A 12 in 6 in 2 4 0 in 2 4 46 87 in 2 1 ft 2 144 in 2 0 3255 ft …

, Chapter: 1 -Problem: 31 >> Calculate the velocity in m/s of a 175-g body if it has a kinetic energy of 212 m N?m.The formula for kinetic energy is KE = ½ mv2, where m = mass and v = velocity.
Answer Preview: V 2KE m 221…

, Chapter: 11 -Problem: 38 >> Figure 11.31 depicts a DN 100 Schedule 40 steel pipe delivering water at 15°C from a main line to a factory. The pressure at the main is 415 kPa. Compute the maximum allowable flow rate if the pressure at the factory must be no less than 200 kPa. Transcribed Image Text: Fully open globe val ve 200 k
Answer Preview: APPLIED FLUID MECHANICS Objective Volume flow rate Problem 11 38 Figure 11 31 System Data Pressure a…

, Chapter: 14 -Problem: 58 >> For a long-throated flume of design B in a rectangular channel, compute the head corresponding to a volume flow rate of 1.25 ft3/s.
Answer Preview: Rectangular channel x Long throated flum…

, Chapter: 1 -Problem: 74 >> Calculate the weight of 1 gal of water if it has a mass of 0.258 slug.
Answer Preview: 1 lb s ft …

, Chapter: 8 -Problem: 48 >> Gasoline at 50°F flows from point A to point B through 3200 ft of standard 10-in Schedule 40 steel pipe at the rate of 4.25 ft3/s. Point B is 85 ft above point A and the pressure at B must be 40.0 psig. Considering the friction loss in the pipe, compute the required pressure at A.
Answer Preview: PB Y PA PB g ZB ZA h PA ZA NR D E 2 h 2g h f vDp 7 76 0 …

, Chapter: 1 -Problem: 39 >> If a pitcher has allowed 39 runs during 141 innings, calculate the ERA.One measure of a baseball pitcher’s performance is earned run average or ERA. It is the average number of earned runs allowed if all the innings pitched were converted to equivalent nine-inning games. Therefore, the units for ERA are runs per game.
Answer Preview: ERA 39 run…

, Chapter: 10 -Problem: 16 >> Determine the energy loss when 1.50 ft3/s of water flows from a 6-in standard Schedule 40 pipe into a large reservoir.
Answer Preview: Exit Loss h L 1 0 …

, Chapter: 13 -Problem: 27 >> Using the result from Problem 13.26, describe how the performance of the pump changes if the system head increases by 15 percent.In ProblemFor the 2 × 3 - 10 centrifugal pump performance curve shown in Fig. 13.28, at what head will the pump having an 8-in impeller operate at its highest efficiency? List the pump€™s capacity, power required, efficiency, and the required NPSH at that head.
Answer Preview: From Problem 13 26 h a1 2…

, Chapter: 1 -Problem: 51 >> The maximum pressure that can be developed for a certain fluid power cylinder is 5000 psi. Compute the required diameter for the piston if the cylinder must exert a force of 20 000 lb.
Answer Preview: D F A F D14 …

, Chapter: 8 -Problem: 22 >> The range of Reynolds numbers between 2000 and 4000 is described as the critical region because it is not possible to predict whether the flow is laminar or turbulent. One should avoid operation of fluid flow systems in this range. Compute the range of volume flow rates in gal/min of water at 60°F for which the flow would be in the critical region in a ¾-in Type K copper tube.
Answer Preview: For N R 4000 v 2 2 0 3897 ft s 0 7794 ft s Q …

, Chapter: 2 -Problem: 20 >> Air at 40°C.Appendix D gives dynamic viscosity for a variety of fluids as a function of temperature. Using this appendix, give the value of the viscosity for the following fluids
Answer Preview: 20…

, Chapter: 10 -Problem: 71 >> Use PIPE-FLO® software to determine the pressure drop in a 20 m horizontal run of DN 100 Schedule 40 pipe, carrying 25°C kerosene at a velocity of 3 m/s. The pipe includes a sharp-edged pipe entrance at the tank, two standard 90° elbows, and a fully open globe valve. Report all applicable values related to the solution such as Reynolds number and friction factor.
Answer Preview: FLO Sheets Select Zoom Fi Basic Devices Fed Device Cen…

, Chapter: 11 -Problem: 18 >> What size of standard hydraulic copper tube from Appendix G.2 is required to transfer 0.06 m3/s of water at 80°C from a heater where the pressure is 150 kPa to an open tank? The water flows from the end of the tube into the atmosphere. The tube is horizontal and 30 m long.
Answer Preview: Class III same method as Prob 11 17 New f 0 0105 D 0 0901 m N R 2 35 10 6 …

, Chapter: 3 -Problem: 41 >> Figure 3.19 shows a diagram of the hydraulic system for a vehicle lift. An air compressor maintains pressure above the oil in the reservoir. What must the air pressure be if the pressure at point A must be at least 180 psig?Figure 3.19 Transcribed Image Text: Oil Lift Air sg = 0.90 cy linder 32 in 8
Answer Preview: p air p A o 64 in 18…

, Chapter: 8 -Problem: 47 >> For the pump described in Problem 8.46, if the pressure at the pump inlet is -2.36 psig, compute the power delivered by the pump to the water.
Answer Preview: vo 28 Po Zo Y vt 2 28 142 1 2 36 lb 62 4 lb …

, Chapter: 1 -Problem: 23 >> If a body moves 3.2 km in 4.7 min with constant acceleration, calculate the acceleration in ft/s2.A body starting from rest with constant acceleration moves according to the relationship s = ½ at2, where s = distance, a = acceleration, and t = time.
Answer Preview: a 2s 232 km 1…

, Chapter: 14 -Problem: 15 >> Figure 14.21 represents the approximate shape of a natural stream channel with levees built on either side. The channel is earth with grass cover. Use n = 0.04. If the average slope is 0.000 15, determine the normal discharge for depths of 3 ft and 6 ft. Transcribed Image Text: 6 ft 4 ft 3 ft 10 ft
Answer Preview: a Depth 3 0 ft b Depth 6 0 f…

, Chapter: 3 -Problem: 45 >> For the tank shown in Fig. 3.21, determine the reading of the bottom pressure gage i

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