Seven hundred gallons per minute of water are being discharged by a centrifugal pump 5 ft above the pump inlet. The inlet pressure is 4-in Hg above the atmospheric and the discharge pressure is 29 psia. If the pump has an 8-in diameter inlet and a 4-in diameter discharge, find the new flowrate if thr pump speed is doubled. Assume the pump input is 8Hp. A. 700 gpm B. 1050 gpm C. 1400 gpm D. 1750 gpm

Seven hundred gallons per minute of water are being discharged by a centrifugal pump 5 ft above the pump inlet. The inlet pressure is 4-in Hg above the atmospheric and the discharge pressure is 29 psia. If the pump has an 8-in diameter inlet and a 4-in diameter discharge, find the new flowrate if thr pump speed is doubled. Assume the pump input is 8Hp. A. 700 gpm B. 1050 gpm C. 1400 gpm D. 1750 gpm

Automotive Technology: A Systems Approach (MindTap Course List)

6th Edition

ISBN:9781133612315

Author:Jack Erjavec, Rob Thompson

Publisher:Jack Erjavec, Rob Thompson

Chapter34: Emission Control Diagnosis And Service

Section: Chapter Questions

Problem 2RQ: What will result from too little EGR flow? And what can cause a reduction in the flow?

See similar textbooks

Similar questions

A single jet Pelton wheel is required to drive a generator to develop 10Mw. The available head at the nozzle is 762m. Assuming electric generator efficiency is 95%, Pelton wheel efficiency 87%, coefficient of velocity 0.97, mean bucket velocity 0.46 of the jet velocity, outlet bucket angle 15° and the friction of bucket reduces the relative velocity by 15%, find (a) the flow rate of water through turbine (b) the diameter of the jet (c) the force exerted by the jet to the nozzle.
EX.1 An axial flow pump with an impeller rotor diameter of 30 cm handles water at a rate of 2.7 m?/minute running at 1500 rpm. The energy input is e ——T e T ‘a 125 J/kg and Total to Total efficiency is 0.75. If a geometrically similar pump has a diameter of 20 cm running at 3000 rpm, find its: i) Flow ratei) input power.
Q Consider the following data relating toperformance of a centrifugal pump:speed 1200 rpm, flow rate 30 L/s, head 20 m, and power 5 kW. If the speed of the pump is increased to 1500 rpm, assuming the efficiency isunaltered, Find the new flow rate and head.
A piston PDP has a 5-in diameter and a 2-in stroke andoperates at 750 r/min with 92 percent volumetric effi ciency.(a) What is its delivery, in gal/min? (b) If the pump deliversSAE 10W oil at 20°C against a head of 50 ft, what horsepoweris required when the overall effi ciency is 84 percent?
A centrifugal pump is pumping water at the design conditions with a flowrate of 2300 gpm and a tangential velocity of U2=65ft/s. The flow passage area at the outlet is A2=1ft2. About 5% of the flow is recirculated internally and pumped again. The actual head rise of the pump is 94ft and the blade angle at outlet is 28º. Knowing that the total number of blades is Zb=24, the power needed to operate the pump is Ps=65hp. Take g = 9.81 m/s2 = 32.2 ft/s2 & ρw = 998 kg/m3 =1.94 Slug/ft3. Estimate the theoretical head of the pump in ft using Stodola’s formula (Hi). Determine the mechanical efficiency of the pump (ηm).
An existing pump is used to pump water with the following data at BEP: D = 2.15 in, N = 1784 rpm, ρ = 998 kg/m3, Q = 18 gpm, H = 4.2 ft. A larger pump is to be designed based from the existing one to be used for pumping slurry (ρ = 1220 kg/m3) such that its best efficiency point occurs as close as possible to a volume flow rate of 48 gpm and at a net head of 15 ft. Calculate the new pump diameter in inches. Round off your final answer to 3 decimal places.
Before solve the problem please understand the question. Give me right solution according to the question. A flow rate of 0.14 m3 / s is required from a centrifugal pump with an outer radius of 23cm and rotating at 900 rpm. The width of the propeller is b = 8cm (at the outlet). Assuming 73% efficiency, what motor horsepower is required if the outlet angle is 165º? Suppose the pallets occupy 5% of the exit area.
A pump has a suction condition of 50mm Hg vacuum pressure, 100mm diameter pipe and discharged condition of 250kpa at, 90mm diameter. The discharge tank is 50m elevation and the suction is 5m below the pump center line. If the discharge is 0.20 m3/s, find the pump efficiency for 260kw brake power. Answer: 74.32%
A single-stage centrifugal pump having a suction pipe 254 mm in diameter anda discharge pipe diameter of 5 inches is being tested and found out to discharge 48 lps ofwater. A pressure gage connected to the inlet pipe reads 118 mm Hg vacuum and adischarge gage reads 150 kPa at a distance 100 cm above the point where the inletpressure was measured. If the kW rating of the driving motor is 12 kW, calculate a) thepump efficiency. b) if this pump runs at 1800 rpm, what will be the new discharge rate,head, and power developed if the pump speed was increased to 3600 rpm? Assumeconstant efficiency. c) Determine the pump type.
An existing impulse turbine-generator installation operates at 450 rpm under a net Head of 520 m. The output current is 60 cycles per second. If a single 18-cm diameter waterjet is used, Cv = 0.98, Øe = 0.45 and ηT = 0.85. Find the flow through turbine in m3/sec.
A fi reboat pump delivers water to a vertical nozzle with a3:1 diameter ratio, as in Fig. If duct and nozzle frictionare neglected and the pump provides 12.3 ft of head tothe fl ow, what will be the outlet fl ow rate?( a ) 85 gal/min, ( b ) 120 gal/min, ( c ) 154 gal/min,( d ) 217 gal/min, ( e ) 285 gal/min
A Pelton wheel is to be designed for a head of 400 m when running at 500 rpm. The Pelton wheel develops 10000kW shaft power. The blade angle at outlet is 15º. The relative velocity of water is reduced by 5% by moving over the buckets. Velocity of the buckets = 0.45 times the velocity of the jet, overall efficiency = 0.8 and coefficient of the velocity = 0.98. If the Pelton wheel is provided with three nozzle, find (i) The diameter of jet (ii) Total flow rate and the force exerted by a jet on the buckets