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 7.12PP
In a pump test the suction pressure at the pump inlet is
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A pump has a 100 mm diameter suction pipe and a 75 mm discharge pipe The capacity is 15 L/s of water A water-
mercury manometer is installed in the inlet which reflects a vacuum pressure of 198mm of Hg The mercury level on the
suction side is 100 mm below the pipe centerline. The pressure gauge 200 mm above the pump iniet recorded a pressure
of 0.95 bar. The measured input power was 3.2 kW Find the efficiency of the pump
Select the correct response(s)
75.12 %
60 42 %
59 01 %
80.43 %
a pump discharges 250 gpm of water at a temperature of 180 fahrenheit against atotal head of 152 psig. Calculate the water horsepower delivered by the unit.
A large container filled with water and uncovered for use in fighting fires in an ethylene production plant. Water from this tank is pumped into the nozzle when needed use. This fire suppression system is designed to be able to transmit 1890 L/min of water at a pressure of 15 bar (relative pressure). If we ignore the difference in height between the water level in the tank and pump, there is no change in diameter of pipe and nozzle, pump efficiency is 70%. Ask how much work (hp) is required to the pump to achieve the desired pressure and flow would like?
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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- The velocity of water and pressure at the suction side of a pump is 4m/s and 90kPa respectively. If the velocity of water is 8m/s and the pressure is 140kPa on the discharge side of a pump, what is the head added by the pump?arrow_forwardNOTE: THE ANSWER SHOULD BE Q=10.75 m3/s Find the flow rate of water through the system shown for the turbine to produce 20 kW. Neglect friction in your calculationsarrow_forward2. A pump draws water from a lake delivered to a height of 50 meters above the lake and encounters 15 meters of headloss. Determine the pump power requirement in Kilo-Watts to deliver a constant supply of 500 Liters per second? The correct answer has a margin of 1 from exact answer. Velocity head is neglected.arrow_forward
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- A pump is driven at 1800 RPM and delivers 12 GPM at 2000 psi. If the volumetric efficiency is 90%, Calculate the volumetric displacement of this pump.arrow_forwardA pump has a 100 mm diameter suction pipe and a 75 mm discharge pipe. The capacity is 15 L/s of water. A water-mercury manometer is installed in the inlet which reflects a vacuum pressure of 198mm of Hg. The mercury level on the suction side is 100 mm below the pipe centerline. The pressure gauge 200 mm above the pump inlet recorded a pressure of 0.95 bar. The measured input power was 3.2 kW. Find the head added by the pump.arrow_forwardThe hydraulic motor has a displacement volume. (Displacement Volume) is 130 x 10-6 m³/rey and the pressure in the system is 105 x 105 Pa and has a speed of 33.34 rey / S if the actual flow rate of the hydraulic motor is 0.005 m³ /s and the actual torque is 200. Nm Find 1. Volumetric efficiency of a hydraulic motor 2. Mechanical efficiency 3. Total efficiency of a hydraulic motor 4. Power of Hydraulic motorarrow_forward
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