Download AKTU B-Tech 7th Sem 2018-2019 NEC 031 Information Theory And Coding Question Paper

Code: 20A03301

B.Tech II Year I Semester (R20) Supplementary Examinations December 2023

FLUID MECHANICS

(Civil Engineering)

Time: 3 Hours Max. Marks: 70

Note: 1. Question paper consists of two parts (Part-A and Part-B)

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2. Answer ALL the questions in Part-A

3. Answer any FIVE Questions from Part-B

PART – A

Marks: 2 x 10 = 20

1. a) Define viscosity and give its units.
2. b) What is meant by center of pressure?

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3. c) Define stream line and path line.
4. d) Define Euler's equation.
5. e) Define laminar and turbulent flow.
6. f) What do you mean by HGL and TEL?
7. g) Define equivalent pipe.

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8. h) Define specific speed of a turbine.
9. i) What is meant by NPSH?
10. j) Define indicator diagram.

PART – B

Marks: 10 x 5 = 50

1. A 450 mm diameter pipe contains water under a pressure of 200 KN/m². If the datum line is 5 m below the center of the pipe, find the total energy per unit weight of the water.

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2. A rectangular plane surface 2m wide and 3m deep lies in water in such a way that its plane makes an angle of 30° with the free surface of water. Determine the total pressure and position of center of pressure, when the upper edge is 1.5 m below the free surface.

3. Derive Bernoulli's equation from Euler's equation of motion.

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4. Water flows through a pipe AB 1.2 m diameter at 3 m/s and then passes through a pipe BC 1.5 m diameter. At C, the pipe branches. Branch CD is 0.8 m in diameter and carries one-third of the flow in AB. The flow velocity in branch CE is 2.5 m/s. Find the volume rate of flow in AB, the velocity in BC, the velocity in CD and the diameter of CE.

5. Explain the characteristics of laminar and turbulent flow.

6. Determine the rate of flow of water through a pipe 300 mm diameter placed in an inclined position where a venturimeter is inserted, having a throat diameter of 150 mm. The difference of pressure between the main and throat is measured by a liquid of specific gravity 0.6 in an inverted U-tube which gives a reading of 300 mm. The loss of head between the main and throat is 0.2 times the kinetic head corresponding to the velocity in the pipe.

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7. Derive Darcy-Weisbach equation.

8. A Kaplan turbine runner is to be designed to develop 9100 KW. The net available head is 5.6 m. Assume that the speed ratio is 2.09 and flow ratio is 0.68 and the overall efficiency is 86%. If the diameter of the boss is 1/3 of the diameter of the runner, find the diameter of the runner, its speed and the specific speed of the turbine.

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9. What is specific speed of a centrifugal pump? Derive expression for the same.

10. Write a short note on indicator diagram.

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