Download AKTU B-Tech 2nd Sem 2014-15 NCS 201 Computer System And Programming In C Question Paper

Code: 20A03301

B.Tech II Year I Semester (R20) Regular Examinations November 2021

FLUID MECHANICS

(Civil Engineering)

Time: 3 Hours Max. Marks: 70

Note: 1. Question Paper consists of two parts viz. Part A and Part B. 2. Part A is compulsory and carries 20 marks. Answer all questions. 3. Part B consists of 5 units carrying 10 marks each. Answer any one full question from each unit.

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PART – A (10 × 2 = 20 Marks)

1. a) Define the terms: Dynamic viscosity and Kinematic viscosity.

2. b) What do you understand by hydrostatic law?

3. c) Define stream function and velocity potential function.

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4. d) State Bernoulli's theorem.

5. e) What is laminar boundary layer?

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6. f) Define displacement thickness.

7. g) Define the term Dimensional Homogeneity.

8. h) State Buckingham’s π-theorem.

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9. i) What are the characteristics of laminar flow?

10. j) Define total energy line and hydraulic gradient line.

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PART – B (5 × 10 = 50 Marks)

(Answer one full question from each unit)

UNIT – I

1. a) Explain the phenomenon of capillarity. Obtain an expression for capillary rise of a liquid.

   OR

2. b) 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 the water. Determine the total pressure and position of center of pressure, when the upper edge is 1.5m below the free surface.

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UNIT – II

1. a) Derive the three-dimensional continuity equation in Cartesian co-ordinates.

   OR

2. b) A stream function is given by ψ = 5x - 6y. Calculate the velocity components and also magnitude and direction of the resultant velocity at any point.

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UNIT – III

1. a) Explain the development of boundary layer over a flat plate and define boundary layer thickness, displacement thickness, momentum thickness and energy thickness.

   OR

2. b) For the velocity profile in laminar boundary layer u/U = 2(y/δ) - (y/δ)², determine the thickness of the boundary layer, shear stress at the wall and the drag coefficient in terms of Reynolds number.

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UNIT – IV

1. a) Define the terms: Dimensionless numbers. List out the important dimensionless numbers and explain their significance.

   OR

2. b) Explain: i) Geometric similarity ii) Kinematic similarity and iii) Dynamic similarity.

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UNIT – V

1. a) Derive Darcy-Weisbach equation for head loss due to friction in pipe flow.

   OR

2. b) A crude oil of viscosity 0.97 poise and relative density 0.9 is flowing through a horizontal circular pipe of diameter 100mm and length 10m. Calculate the difference of pressure at the two ends of the pipe, if 100kg of the oil is collected in 30 seconds.

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