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A necessary precaution in selection of pumps for parallel operations is that

A necessary precaution in selection of pumps for parallel operations is that Correct Answer H-Q characteristics of both should be identical

Necessary precaution for parallel connection of pumps is that the H – Q characteristic should be same

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Two centrifugal pumps P and R are available for use in a pipe flow system and their head-discharge characteristics are as follows. Pump P Pump R Discharge (cumecs) Head (m) Discharge (cumecs) Head (m) 0 40 0 45 0.12 35 0.14 40 0.2 28 0.24 35 0.3 18 0.3 28   The following statements (S1, S2, and S3) pertain to the head and discharge values during actual operation. Neglect losses in the system. Which of the following statements are correct? S1: When the two pumps P and R are connected in parallel, the discharge is 0.36 cumecs corresponding to a head of 35 m. S2: When the two pumps P and R are connected in parallel, the discharge is 0.36 cumecs corresponding to a head of 70 m. S3: When the two pumps P and R are connected in series, the discharge is 0.3 cumecs corresponding to a head of 46 m.
A, B and C are three small pumps fitted to a tank. D is a large pump fitted to the tank. Pump B is 25% more efficient than A. Pump C is 20% more efficient than B. Pump D is 4/3rd efficient of pump C. All of the pumps are used to fill the tank. What is the ratio of the time taken by pumps A and B to fill the tank together to the time taken by the pumps B and D to fill the tank together?
Cconsider the following statements: 1. Pumps used in series are generally of the centrifugal type. 2. Centrifugal pumps, though yielding comparatively smaller discharges than axial flow pumps, yield higher heads (at each stage) compared to axial flow pumps. Which of the above statements is/are correct?
With reference to solar water pumps, consider the following statements: 1. Solar power can be used for running surface pumps and not for submersible pumps. 2. Solar power can be used for running centrifugal pumps and not the ones with piston. Which of the statements given above is/are correct?
A pumping station in a mine has 4 pumps, P1, P2, P3 and P4 which are connected functionally in parallel configuration as shown in the figure. The individual reliability of the pumps P1, P2, P3 and P4 are 0.80, 0.90, 0.85 and 0.95 respectively. For an effective dewatering operation in the mine denoting system success, at least three pumps should be in operation. The reliability of the system is
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Following are the criteria for the selection of Civil Engineers in an organization: The candidate must - (i) have a B.E. or B. Tech from a recognized university with minimum 65% marks. (ii) have secured at least 50 % marks in the selection test. (iii) have secured at least 55% marks in the interview. (iv) not be less than 22 years and not more than 27 years of age as on 1.10. 2019. In case of a candidate who satisfies all other criteria except: a) At (i) above but has more than 2 years experience, the case may be referred to the General Manager, Recruitment. b) At (ii) above but have secured 75% and above marks in the selection interview, the case may be referred to the Sr,V.P. HR. Based on the above criteria and conditions, analyze and decide which of the following course of action should be taken for the candidate whose description is provided below. Please note that you are not to assume anything other than the given information. Amita Sachdeva, born on 20th October, 1992 secured 55% marks in BE final year She got 60% marks in both selection test and interview.
In a police selection 18000 applied for the post of constable. 33(1/3)% of the students applied did not attempted the test. 16(2/3)% of the students who attempted the test got failed. 23% of the students who passed the examination did not appear for the second round of selection. If 28(4/7)% of the students who appeared for the second round of selection passed the selection and selected as a constable, then what is the number of students who finally selected as the constable?
Read the information given below carefully and answer the given questions. For the recruitment process in an accounting organization, the following eligibility criteria are required for the candidates: i) Graduation in Commerce with minimum 60% marks. ii) At least 24 years and not more than 40 years of age as of 1-7-2016. iii) Candidates should have at least 2 years of work experience after education. iv) They should have secured 55% marks in the selection process. However, if the candidate fulfills the above criteria, except: (A) In case of (i), if the candidate is not a graduate in commerce but has a master's degree in finance with 60% marks, he/she should approach the Institute of Finance Management. (B) In case of (iii), if the candidate fulfills the eligibility criteria of at least 2 years work experience after education, not only that he has secured 75% marks in the selection process, he/she may be referred for Trainee Accountant. Based on the above information decide whether the following candidates are eligible in the selection process, and select the appropriate option. You do not have to think about anything other than the information given in the question. All the cases given to you are dated 1-7-2016. Anurag Kumar has 6 years of work experience after education. His birthday is 05-4-1992. He has scored 62% marks in the selection process. He has done his graduation in commerce and has scored 76% marks.
In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of thefour alternatives. _______________ the course of the development of different life-forms heredity—which, in plain English, is unconscious memory generated in the first life-form and ______________ through all the different species—is the sole factor in the ____________ of the parent properties; while adaptation to surrounding conditions and circumstances, natural selection in the struggle _____________ existence, and partner selection in the struggle of the males for ____________ are the principalfactors in the differentiation of species. natural selection in the struggle _____________ existence, and partner selection
2 large and 1 small pumps can fill a water tank in 4 hours. 1 large and 3 small pumps can also fill the same water tank in 4 hours . How many hours will it take for 3 large 4 small pumps to fill the tank?