4- A centrifugal pump was tested for cavitation initiation. Total head was 40 m and flow rate were 0.06 m/s. Cavitation started when the total head at the suction side was 3 m. The atmospheric pressure was 760 mm Hg and the vapor pressure at this temperature was 2 kPa. It was proposed to install the pump where the atmospheric pressure is 700 mm Hg and the vapor pressure at the location temperature is 1 kPa. If the pump develops the same total head and flow, can the pump be fixed as the same height as the lab setup? What should be the new height.

4- A centrifugal pump was tested for cavitation initiation. Total head was 40 m and flow rate were 0.06 m/s. Cavitation started when the total head at the suction side was 3 m. The atmospheric pressure was 760 mm Hg and the vapor pressure at this temperature was 2 kPa. It was proposed to install the pump where the atmospheric pressure is 700 mm Hg and the vapor pressure at the location temperature is 1 kPa. If the pump develops the same total head and flow, can the pump be fixed as the same height as the lab setup? What should be the new height.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A centrifugal pump driven by a 120-kW motor rotating at 2400 rpm is used to pump 20°C water in a manufacturing plant. The pump operates against a head of 30 m and has an efficiency of 70%. If this pump is situated 9 m below the level of the source, calculate (Zs)max and determine if the pump is safe from cavitation. Select one: O a. -7.9 m; NOT SAFE O b. -9.7 m; NOT SAFE O c. -7.9 m; SAFE O d. -9.7 m; SAFE
2. A centrifugal pump having an overall efficiency of 75% is discharging 30 litres of waler per second througha pipe of 150 mm diameter and 125 m long. Calculate the power required to drive the pump, if the water is lifted through a height of 25 metres. Take coefficient of friction as 0-01. (Ans. 11-7kW)
Inner and outer diameters of an outward flow reaction turbine wheel are 1m and 2m respectively. The water enters the vane at angle of 20° and leaves the vane radially. Assuming the velocity of flow remains constant at 12m/s and wheel rotates at 290rpm, find the vane angles at inlet and outlet. Show schematic diagram and provide solutions.
A pipe with a diameter of 2cm is attached to a garden hose with a nozzle. If the velocity of flow in the pipe is 2ms, what is the velocity of the flow at the nozzle when it is adjusted to have a diameter of 4mm?
Question 2) The centrifugal pump in the figure is in his preference Passing water at 25°C from the tank through the 1.22 m exchange store pumping. Inner diameter of the suction channel is 101.6 mm, in total it is 0.0306 and its length is 3.2 m. It the local coefficients of the user in the pipe are 7.4. If the pump works at a flow rate of 109 m3/h ENPY=1.52 is m. Does the pump work without cavitation at this flow? Show the calculation. For water, p=997 kg/m3 and Pb=3.169 kPa. Piping system at the entrance (Suction pipe) pump 22 Patm=101.3 kPa and 0.2=1.05. van
Answer IT ASAP PLEASE.!! a 20 mm diameter steel pipe is used to drain and oil tank (SG-0.88) as shown. The total head loss is 2.904m, find the diameter of a new pipe that can replace the existing one such that the discharge is doubled Control Volume and the velocity of flow is maintained.
Exercise Problem No. 1: An agricultural land install a pump with a 218mm diameter suction pipe and a 200mm diameter discharge pipe. Respectively each pressure reads 1.12 bars and 0.96 bars. The water flow measured 12,500 liters/min.at normal temperature. Calculate the following: 1.Head at the discharge side, m 2. Velocity Head, m 3. Total Head of the pump, m
Q:/ Discuss the relation betwveen the head pressure and flow rate for the benefits of connecting the pumps in parallel ?
Q3
A venturimeter with a 10.16cm throat is installed in a 15.24cm pipe which is inclined upward at an angle of 45 degrees to the horizontal. If the distance between pressure taps along the pipe is 1.5, the difference in pressure is 70 kPa, and the water temperature is 70oC, what is the discharge of water in m3/sec? Assume coefficient of 0.985.
A centrifugal pump having a head-capacityrelationship given by the equation ha=180 –6.10 X 10-4 Q2, with ha in feet when Q is ingpm, is to be used with the system shownin the figure, For Z2-Z1= 50 ft, what is theexpected flowrate if the total length ofconstant diameter pipe is 600 ft and thefluid is water? Assume the pipe diameter tobe 4 inch and the friction factor to be equalto 0.02. Neglect all minor losses.
A venturimeter is attached to pipe of 80 mm diameter has throat of 40 mm diameter. It is found that pressure in the pipe and at throat is 400 kPa and 130 kPa respectively Find velocity of the flow in the pipe.