B.E-B.E Civil Engineering Applied Hydraulic Engineering (Sathyabama University, Chennai, Tamil Nadu-2011)
Monday, 19 August 2013 12:20Duraimani
(Established under section 3 of UGC Act,1956)
Course & Branch :B.E - P-CIVIL
Title of the Paper :Applied Hydraulic Engineering Max. Marks:80
Sub. Code :SCIX1010 (2010-2011) Time : 3 Hours
Date :15/11/2011 Session :AN
PART - A (10 x 2 = 20)
Answer ALL the Questions
1. Define laminar boundary layer.
2. Define displacement thickness.
3. Give Reynolds number for different types of flow.
4. Write any three minor losses.
5. Write the expression for the minimum specific energy in terms of critical depth.
6. Write the mathematical expression for steady flow.
7. Write the conditions for the formation of hydraulic jump.
8. Write any three types of jumps with reference to Frouds number.
9. When do you prefer multistage pumps.
10. Define negative slip.
PART – B (5 x 12 = 60)
Answer All the Questions
11. (a) Derive the equation for momentum thickness. (8)
(b) Draw a neat sketch of a boundary layer and name the components. (4)
(or)
12. Find the displacement thickness, energy thickness and momentum thickness for the velocity distribution in the boundary layer given by u/U = y/ δ where u is the velocity at a distance y from the plate and u = U at y = δ , δ is the boundary layer thickness. Also calculate δ*/ θ
13. A main pipe divides into two parallel pipes which again forms a single pipe . The length of the first parallel are 2000m and 1.0m, and for the second pipe is 2000m and 0.8m resp. Find the rate of flow in each parallel pipe if the total flow in the main pipe is 3m3/sec. The coefficient of friction for each pipe is 0.005
(or)
14. (a) Find the head lost due to friction in a pipe of diameter 300mm and length 50m through water is flowing at a velocity of 3m/sec using Chezys and Darcy’s formulas.
(b) Derive the Darcy -Weisbach equation.
15. Derive the conditions for the most economical trapezoidal section
(or)
16. (a) Find the slope of the trapezoidal channel of bed width 4m and depth 3m and side slopes 2horizontal and 1 vertical, when discharge through the channel is 20m3/sec. (7)
(b) Draw a neat sketch of specific energy curve and name the components. (5)
17. Determine the length of back water curve caused by an afflux of 2m in a rectangular channel of width 40m and depth 2.5m. The slope of the channel is 1 in 11000. Take N=0.03
(or)
18. Derive the equation for gradually varied equation
19. (a) Draw a neat sketch of a reciprocating pump and explain the working procedure. (8)
(b) Write the uses of air vessels. (4)
(or)
20. The internal and external diameters of a impeller of centrifugal pump are 200mm and 400mm resp. .The pump is running at a speed of 1200rpm. The vane angles of the impeller at inlet and outlet are 200, 300 resp. The water enters the impeller radially and aA velocity of flow is constant. Determine the work done by the impeller per unit weight of water.
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