I need to practice for exam and I’m stuck ! Can someone help me Question 4. High Pressure Hot Water and Centrifugal pumps.Question 4 Section A:(i) Briefly discuss why it is important to use an anti-flash margin in high pressure hot watersystems. (To obtain full marks, use the concepts of saturation pressure, saturation temperature,working pressure and working temperature to elaborate your answer).Page 5 of 7(ii) Briefly explain two (02) negative effects of suction cavitation on centrifugal pump systemperformance. (Simply listing the effects will not be sufficient. You are expected to explain why theeffects you chose are seen as negative effects of suction cavitation).(iii) An engineer can specify the design flow rate and the design head for a centrifugal pumpsystem by plotting the pump curve and the system curve on the same graph to obtain theoperating point. Using suitable sketches, briefly discuss what will happen to the operating point(and the design values) under the following two situations:(a) Decreasing the rotational speed of the pump.(b) Rust and limescale building up inside the pipes used in the suction side of the pumping system.

High-Pressure Hot Water Systems and Centrifugal Pumps 1.Anti-Flash Margin in High-Pressure Hot Water…

Answered: Question 4. High Pressure Hot Water and…

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

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Cavitation is an undesirable phenomenon that occurs in pumping systems. About cavitation incentrifugal pumps, analyze the following statements:I. The cavitation in centrifugal pumps depends only on the flow rate of the flowing fluid.II. The required NPSH must always be higher than available in order to avoid cavitation.III. The available NPSH (d) is related to the suction head and suction head losses. This onemust be greater than the required NPSH(r) (or NPSH(a)), which is related to the equipment.IV. The larger the suction pipe, the less chance of cavitation occurring.It is correct what is stated in:ALTERNATIVESa) I, just.b) III, only.c) III and IV only.d) I, II and III only.e) I, II and IV only.
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Hello i have an example with an answer , please show the solution since only the answer was shown in this example. And i need its solution to review properly. Thank you 1.Question : 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 placesAnswer: 2.554
Question 1: B The diagram shows water leaving a tank through an inverted V-tube. (All answers to be given in SI units.) y (ft) | q-in diameter x=7 ft, y=9 ft, z=16 ft, diameter = d q=2.9 in a) Determine the velocity at which water leaves the tank. b) Determine the mass flow-rate at which water leaves the tank. c) Determine the pressure at point B (report your answer in Pa). d) Given that the diameter at the constriction is 2.4 in, determine the pressure at point A. e) Given that the water is at 50 °C, and that the vapor pressure of water is 12.3 kPa at that temperature, state whether cavitation is likely to occur at A?

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