UANDISTAR

Code No: T0123/R07

II B.Tech II Semester, Regular Examinations, Apr - 2011

HYDRAULICS AND HYDRAULIC MACHINERY

(Civil Engineering)

Time: 3 hours Max Marks: 80

Answer any FIVE Questions

All Questions carry equal marks

1. a) What different types of flows in open channels? And what are different types of open channels? (8M)

b) Derive Manning’s equation for uniform flow in open channels. Discuss its applications. (8M)

2. a) What are the characteristics of non uniform flow in open channels? State the dynamic equation of

GVF and discuss its uses. (10M)

b) Explain how energy is dissipated in a hydraulic jump formation (6M)

3. a) Explain the Buckingham theorem and discuss its uses (10M)

b) Derive the expressions for Reynolds Number, Mach Number and Froude Number (6M)

4. a) A jet of water strikes with a velocity of 50 m/sec a flat fixed plate inclined at 30 degrees with the axis

of the jet. The cross sectional area of the plate is 100 cm2. Find the force exerted by the jet on the plate

and the ratio in which the jet gets divided after striking. (8M)

b) Derive the equation for the impact of jet striking a moving inclined plate in the direction of the jet

(8M)

5. a) What are the different heads and efficiencies associated with hydroelectric power plants? (8M)

b) Differentiate between impulse turbine and reaction turbine with examples (8M)

6. a) What is draft tube? Why is it a part of reaction turbines? (8M)

b) Explain the phenomenon of water hammer. What is a surge tank? Where is it located in a power

plant? (8M)

7. a) What are the types of similarities between a prototype and a model? (8M)

b) A hydraulic turbine develops 8000 KW under a head of 30 m at 250 rpm. What is the specific speed

of the turbine? What would be the speed and power under a head of 18m. (8M)

8. a)What are the performance characteristics of centrifugal pumps ? (8M)

b) Determine the number of the impellers required for a multistage centrifugal pump to deliver 3000

litres per minute to a height of 200m at a speed of 800 rpm. The specific speed value is not to exceed

600. (8M)

1 of 1

SET - 1

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UANDISTAR

Code No: T0123/R07

II B.Tech II Semester, Regular Examinations, Apr - 2011

HYDRAULICS AND HYDRAULIC MACHINERY

(Civil Engineering)

Time: 3 hours Max Marks: 80

Answer any FIVE Questions

All Questions carry equal marks

1. a) How does the velocity vary across the cross section of an open channel? What is an energy and

momentum correction factor? Derive their equations. (10M)

b) Discuss critical, sub critical and super critical flows in open channels (6M)

2. a) State the dynamic equation of GVF and discuss its applications (8M)

b) Explain the characteristics of a hydraulic jump. How is the energy dissipated in hydraulic jump

formation? Derive the equation. (8M)

3. a) What are the uses of dimensionless numbers? Derive the expressions for Weber, Mach and

Froude Numbers (10M)

b) Explain Buckingham Pi theorem (6M)

4. a) A nozzle of size 10 cm diameter issues a jet of water with a velocity of 50m/sec. The jet strikes

a moving flat plate perpendicularly at the centre. The plate is moving with a velocity of 15m/sec

in the direction of the jet. Calculate

i) The force exerted on the plate

ii) The work done

iii) Efficiency of the jet (8M)

b) Derive the equation for the impact of jet striking a curved plate at the centre when the plate is

stationary. (8M)

5. a) Draw a typical layout of a hydro power plant and discuss different elements. (8M)

b) How do you distinguish between high head turbine and low head turbine? Explain with

examples. (8M)

6. a) Explain the working of a Pelton wheel with neat sketches? (8M)

b) A Francis turbine works under a head of 8.5 m at a speed of 300 rpm. A power of 100 KW is

developed with a discharge of 3 m3/sec. The runner diameter is 2.2 m. Find the speed, discharge

and power if the head is increased to 18m. (8M)

7. a) How do you achieve the governing of turbines? Explain with neat sketches. (8M)

b) Discuss the different characteristic curves of turbines? (8M)

8. a) What is a centrifugal pump? How are the centrifugal pumps classified? (8M)

b) A fluid is to be lifted against a head of 120m. The pumps that run at a speed of 1200 rpm with

rated capacity of 300 litres per second are available. How many pumps are required to pump the

water if specific speed is 700. (8M)

1 of 1

SET - 2

www.uandistar.org

www.uandistar.org

UANDISTAR

Code No: T0123/R07

II B.Tech II Semester, Regular Examinations, Apr - 2011

HYDRAULICS AND HYDRAULIC MACHINERY

(Civil Engineering)

Time: 3 hours Max Marks: 80

Answer any FIVE Questions

All Questions carry equal marks

1. a) State and explain Chezy’s formula for uniform flow in open channels. What is momentum

energy correction factor? (8M)

b) What do you mean by most economical section of a open channel? Discuss in detail. (8M)

2. a) Derive equation for Gradually Varied Flow from fundaments. Discuss the applications (10M)

b) What is a hydraulic jump? Where does it form? Explain in detail (6M)

3. a) List out different dimensionless numbers and derive the expressions for any three of them.

(10M)

b) Discuss different similarities between models and prototypes (6M)

4. a) A jet of water of diameter 40 mm moving with a velocity of 30m/sec strikes a curved fixed

symmetrical plate at the center. Find the force exerted by the water on the plate, if the jet is

deflected through an angle of 120 degrees at the outlet of the curved plate. (8M)

b) Derive the equation for impact of jet striking a curved plate at one tip and leaving at the other

tip, when the plate is stationary (8M)

5. a) What are the types of hydroelectric power plants? Explain in detail (8M)

b) What are the criteria on which the turbines are classified? (8M)

6. a) What is the type of Francis turbine? Explain its working with neat sketches. (10M)

b) Discuss the significance and uses of the draft tubes? Derive the equation for the efficiency of a

draft tube. How are they classified? (6M)

7. a) What is specific speed? What are its uses? (10M)

b) Why is governing of turbine required? Discuss how the turbines are governed with neat

sketches. (6M)

8. a) What is the principle of working of a reciprocating pump? Explain the working of reciprocating

pump with neat sketches. (8M)

b) Water is to be pumped to a height of 90m. The pumps that run at a speed of 1000 rpm with

rated capacity of 200 litres per second are available. How many pumps are required to pump the

water if specific speed is 800. (8M)

1 of 1

SET - 3

www.uandistar.org

www.uandistar.org

UANDISTAR

Code No: T0123/R07

II B.Tech II Semester, Regular Examinations, Apr - 2011

HYDRAULICS AND HYDRAULIC MACHINERY

(Civil Engineering)

Time: 3 hours Max Marks: 80

Answer any FIVE Questions

All Questions carry equal marks

1. a) What different types of flows in open channels? What is energy correction factor? Derive the

equation for the same. (8M)

b) State and explain Bazin’s formula for uniform flow in open channels (8M)

2. a) What is rapidly varied flow? Derive the expression for energy dissipation in a hydraulic jump

formation. (8M)

b) List out different surface profiles of non uniform flow in open channels. (8M)

3. a) State Reyleigh’s Theorem and discuss its applications Discuss geometric, dynamic and

kinematic similarities between models and prototypes. (10M)

b) Discuss geometric, dynamic and kinematic similarities between models and prototypes. (6M)

4. a) A jet of oil of specific gravity strikes a fixed curved symmetrical plate at its center and leaves

at the outlet tips. The diameter of the jet is 62 mm and the velocity of the jet is 45 m/sec. If the jet

is deflected by 100 degrees, calculate the force exerted on the curved plate. (8M)

b) How do estimate the impact of a jet striking a moving normal plate in the direction of the jet

(8M)

5. a) What is a mass curve? What are its uses? (6M)

b) Discuss the classification of turbines with neat sketches. Specify the features and advantages of

different types. (10M)

6. a) Explain the working of a Kaplan turbine with neat sketches. (6M)

b) What is a draft tube? What are its types? Explain its use and derive the equation for its

efficiency. (10M)

7. a) What are different unit quantities? Derive the equations (8M)

b) A reaction turbine develops 7000 KW under a head of 45m with a speed of 150 rpm. What is

the specific speed of the turbine? What will be the power and speed when the turbine works

under a head of 20m. (8M)

8. a) What is indicator diagram of a reciprocating pump? Explain the working of a reciprocating

pump with neat sketches. (8M)

b) How many impellers are required in a multistage pump to lift 5000 litres/minute against a head

of 200m, at a speed of 800 rpm. The specific speed of the impeller is not to exceed 700. (8M)

1 of 1

SET - 4

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