Applied Fluid Mechanics (7th Edition)
7th Edition
ISBN: 9780133494839
Author: Mott
Publisher: PEARSON
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Chapter 13, Problem 13.56PP
Determine the NPSH available when a pump draws carbon tetrachloride at
) from a tank whose level is
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Chapter 13 Solutions
Applied Fluid Mechanics (7th Edition)
Ch. 13 - List 12 Factors that should be considered when...Ch. 13 - List items that must be specified for pumpsCh. 13 - Describe a positive-displacement pump.Ch. 13 - Name four examples of rotary positive-displacement...Ch. 13 - Name three types of reciprocating...Ch. 13 - Describe a kinetic pumpCh. 13 - Name three classifications of kinetic pumps.Ch. 13 - Describe the action of the impellers and the...Ch. 13 - Describe a jet pumpCh. 13 - Distinguish between a shallow-well jet pump and a...
Ch. 13 - Describe the difference between a simplex...Ch. 13 - Describe the general shape of the plot of pump...Ch. 13 - Describe the general shape of the plot of total...Ch. 13 - To the head-versus-capacity plot of Problem 13.13...Ch. 13 - To what do the affinity laws refer in regard to...Ch. 13 - Fora given centrifugal pump, if the speed of...Ch. 13 - For a given centrifugal pump, if the speed of...Ch. 13 - For a given centrifugal pump, if the speed of...Ch. 13 - For a given size of centrifugal pump casing, if...Ch. 13 - For a given size of centrifugal pump casing, if...Ch. 13 - For a given size of centrifugal pump casing, if...Ch. 13 - Describe each part of this centrifugal pump...Ch. 13 - For the line of pumps shown in Fig.13.22 specify a...Ch. 13 - For the line of pumps shown in Fig. 13.22 ,...Ch. 13 - For the 2x310 centrifugal pump performance curve...Ch. 13 - For the 2310 centrifugal pump performance curve...Ch. 13 - Using the result from Problem 13.26 describe how...Ch. 13 - For the centrifugal pump performance curve shown...Ch. 13 - Prob. 13.29PPCh. 13 - State some advantages of using a variable-speed...Ch. 13 - Describe how the capacity, efficiency, and power...Ch. 13 - If two identical centrifugal pumps are connected...Ch. 13 - Describe the effect of operating two pumps in...Ch. 13 - For each of the following sets of operating...Ch. 13 - For the 112313 centrifugal pump performance curve...Ch. 13 - For the 6817 centrifugal pump performance curve...Ch. 13 - Figure 13.52 shows that a mixed-flow pump is...Ch. 13 - Compute the specific speed for a pump operating at...Ch. 13 - Compute the specific speed for a pump operating at...Ch. 13 - Compute the specific speed for a pump operating at...Ch. 13 - Compute the specific speed for a pump operating at...Ch. 13 - It is desired to operate a pump at 1750 rpm by...Ch. 13 - Define net positive suction head (NPSH).Ch. 13 - Distinguish between NPSH available and NPSH...Ch. 13 - Describe what happens to the vapor pressure of...Ch. 13 - Describe why it is important to consider NPSH when...Ch. 13 - For what point in a pumping system is the NPSH...Ch. 13 - Discuss why it is desirable to elevate the...Ch. 13 - Discuss why it is desirable to use relatively...Ch. 13 - Prob. 13.50PPCh. 13 - If we assume that a given pump requires 7.50 ft of...Ch. 13 - Determine the available NPSH for the pump in...Ch. 13 - Find the available NPSH when a pump draws water at...Ch. 13 - A pump draws benzene at 25 C from a tank whose...Ch. 13 - Determine the available NPSH for the system shown...Ch. 13 - Determine the NPSH available when a pump draws...Ch. 13 - Determine the NPSH available when a pump draws...Ch. 13 - Determine the NPSH available when a pump draws...Ch. 13 - Determine the NPSH available when a pump draws...Ch. 13 - Repeat Problem 13.56 if the pump is 44 in below...Ch. 13 - Repeat Problem 13.59 if the pump is 27 in above...Ch. 13 - Repeat Problem 13.57 if the pump is 1.2 m below...Ch. 13 - Repeat Problem 13.58 if the pump is installed...Ch. 13 - A pump draws propane at F (sgfrom a tank whose...Ch. 13 - A pump draws propane at 45 C (sg =0.48 ) from a...
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- Determine the maximum total head at which a 7hp centrifugal pump can extract at a rate of 350 gpm if the pump efficiency is 50%.arrow_forwardHow high must the pump centerline be located above the water level in an open tank that supplies water to the pump if it requires a minimum of 2.5m of NPSH? The barometer reading is 760mmHg, the pipe friction is 0.65m and the vapor pressure is 3.51kPa. 6.82m 5.48m 7.39m 4.99marrow_forwardA centrifugal pump delivers 3000,000 liters per hour of water to a pressurized tank whose pressure is 280 kPa. The source of water is 5 meters below the pump. The diameter of the suction pipe is 300 mm and the discharged pipe is 250 mm. calculate the KW rating of the driving motor assuming the pump efficiency to be 72%.(answer is 13.16 KW)arrow_forward
- A centrifugal pump has NPSH required of 25 ft. The water temperature is 90 deg. Fahrenheit and the friction loss at suction is 1.4 ft. The pump takes water from an open tank below the pump centerline. (Note: @90 deg. Fahrenheit: Psat = 0.69 psia and specific volume = 0.01608 ft3/lb). Determine the maximum static elevation in feet at the suctionarrow_forwardWhat work must be done by a pump that is 60 percent eficient?arrow_forwardA small centrifugal pump is used to deliver 0.005 m3/s of water to level 2 as shown in Fig. 2. Neglecting the losses, determine the required power input to the pump if its efficiency is equal to 70%.arrow_forward
- Assume that friction in the suction line is negligible. Toluene @ 35C is pumped from an open reservoir to a tank kept at a gauge pressure of 150 kPa. The pump itself is 3 m below the reservoir, while the discharge tank is 10m above the reservoir. While in the discharge line the friction head amounts to 7.5 m, determine the net positive suction head available for the pump. If the pump has an efficiency of 65%, determine the total power input. At the given temp, the density and vapor pressure of toluene are 862 kg/m3 and 40 mmHg.arrow_forwardA centrifugal pump is discharging 900 gpm and which operates at 1800 rpm against a head of 120 ft and maximum efficiency of 91%. If this pump is modified to operate at 1200 rpm, assuming its efficiency remains constant, determine its discharge, the theoretical head it imparts to the liquid and the power input to the pump.arrow_forwardif the pump flow rate in a simple hydraulic system is 10 gmp and the maximum system pressure is 3,000 psi, what size reservoir and conductors for pump inlet and working lines would you choose to install? why?arrow_forward
- assume that the turbine is operating at a temperature of 800 degrees Rankinearrow_forwardA pump takes water at 60°F from a large reservoir and delivers it to the bottom of an open elevated tank 25 ft above the reservoir surface through a 3 inch ID pipe. The inlet to the pump is located 10 ft below the water surface, and the water level in the tank is constant at 160 ft above the reservoir surface. The pump delivers 150 gal/min. If the total loss of energy due to friction in the piping system is 35 ft·lbf/lb. The pump and its motor have an overall efficiency of 55 %. i. Determine Delta Z (Z2 - Z1) in ft. ii. What is the actual shaft work needed for this particular mass flow rate in (ft-lbf)/s. iii. What is the mass flow rate of the water in lbm/s?arrow_forwardA pump takes water at 60°F from a large reservoir and delivers it to the bottom of an open elevated tank 25 ft above the reservoir surface through a 3 inch ID pipe. The inlet to the pump is located 10 ft below the water surface, and the water level in the tank is constant at 160 ft above the reservoir surface. The pump delivers 150 gal/min. If the total loss of energy due to friction in the piping system is 35 ft·lbf/lb. The pump and its motor have an overall efficiency of 55 %. answer the ff: i. Determine the velocity of the water at point 2. ii. Reynolds number for the flow. iii. A pump efficiency of 55% means that the theoretical work needed for the process is 55% of the actual work needed. In other words, 55% more shaft work is necessary. Determine the theoretical shaft work required in foot-pound force per pound mass.arrow_forward
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