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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?
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.
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, 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?
Which of the following statements are correct? 1) Velocity compounded impulse turbine gives less speed and less efficiency. 2) For an ideal centrifugal compressor, the pressure produced depends on impeller velocity and diameter. 3) While flowing through the rotor blades in a gas turbine, the relative velocity of gas continuously decreases. 4) While flowing through the rotor blades in an axial flow compressor, the relative velocity of air continuously decreases.
Reciprocating pumps has ____ efficiency compared to centrifugal pumps
The following table shows the percentage of marks obtained by seven students in six different subjects in an examination. Student Maths Chemistry Physics Geography History Computer Science   Maximum Marks = 150 Maximum Marks = 130 Maximum Marks = 120 Maximum Marks = 100 Maximum Marks = 110 Maximum Marks = 90 Ankit 100 80 80 40 70 70 Aman 90 50 90 60 90 80 Ayush 80 65 70 70 80 80 Rohit 90 60 80 95 60 60 Tanvi 80 65 65 80 40 60 Tarun 70 75 85 77 50 90 Muskan 65 35 50 85 80 80   What are the average marks obtained by all the seven students in Physics? (Rounded off to two digits after the decimal)
Given below are two statements followed by two conclusions labelled I and II. Assuming that the information in the statement is true, decide which conclusion(s) logically and definitely follow(s) from the information given in the statements. Statements: All blades are motors. All motors are jugs. Conclusion I: All jugs are blades. Conclusion II: Some blades are jugs.
Read the given statement(s) and conclusions carefully and select which of the conclusions logically follow(s) from the statement(s). Statement: All razors are blades All blades are metals Conclusions: 1. All metals are razors 2. Some metals are blades.
In the following question below are given some statements followed by some conclusions based on those statements. Taking the given statements to be true even if they seem to be at variance from commonly known facts. Read all the conclusions and then decide which of the given conclusion logically follows the given statements. Statements: 1. Some blades are razors. 2. All razors are axes. Conclusion: I. Some axes are blades. II. Some blades are axes.