STUPIDSID
Answer any one question from Q1 and Q2
1 (a)
What is the objective of streamlining an immersed body ? Draw the flow pattern across a flat plate when 1. Flat plate held parallel to flow of air and 2. Flat plate held perpendicular to flow of air.
4 M
1 (b)
A circular cylinder is of length 60 cm, has a diameter of 30 cm and is kept in air flow at a velocity of 15 m/s. If the CD is 1.5 and density of 1.2 kg/m3 find the drag force. If the same cylinder is placed in flow of water what will be the change in drag force exerted ?
4 M
2 (a)
What is water hammer pressure and why is it developed and what are the factors which result in the development of this pressure ?
4 M
2 (b)
Find the rise of pressure in pipe line carrying water when the valve at the end of pipe is closed suddenly at 1.5 seconds. Take the dimensions of pipe as, diameter = 25 cm, length 1250 m, velocity of flow 1.5 m/s.
4 M
Answer any one question from Q3 and Q4
3 (a)
With neat sketch of open channel and pipe flow, explain the marked difference causing flow in both case.
3 M
3 (b)
Develop the energy equation for open channel flow.
3 M
4 (a)
What is specific energy and how does it differ from total energy? With a neat sketch of specific energy curve, classify the type of flow in an open channel.
3 M
4 (b)
A discharge of 6000 lps flows in 3 m wide rectangular channel at a depth of 80 cm. What is the 1) Critical depth?
2) Specific energy and?
3) Type of flow?
2) Specific energy and?
3) Type of flow?
3 M
Answer any one question from Q5 and Q6
5 (a)
Determine the dimensions of a most economical trapezoidal section of an open channel to supply a discharge of 12 m3/s with a slope of 1 in 2500. Assume side slope of 1:1 for the channel section.
4 M
5 (b)
Classify the hydraulic jump based on Froude number.
2 M
6 (a)
What is hydraulic jump and what are the practical locations of its occurrence ? Explain the importance of hydraulic jump as energy dissipator.
3 M
6 (b)
In a hydraulic jump in a rectangular channel the depth of flow before and after jump are 0.30 m and 2.5 m. Calculate
1) Critical depth
2) Discharge
3) Specific energy before jump
1) Critical depth
2) Discharge
3) Specific energy before jump
3 M
Answer any one question from Q7 and Q8
7 (a)
Explain the importance of impulse momentum equation and its application in the field of Hydraulic Machines.
4 M
7 (b)
A 10 cm diameter jet having velocity of 30 m/s strikes a flat plate, the normal of which is inclined at 30° to the axis of jet. Find the normal force on plate when 1) Plate stationary
2) Plate moves with velocity 10 m/s
3) Determine the power and efficiency of jet when plate is stationary and moving.
2) Plate moves with velocity 10 m/s
3) Determine the power and efficiency of jet when plate is stationary and moving.
6 M
7 (c)
Derive the work done and efficiency of jet striking curved unsymmetrical vane at one tip, when moving.
6 M
8 (a)
Draw a neat sketch of centrifugal pump showing all components and various heads. Obtain an expression for suction pressure at inlet of pump.
8 M
8 (b)
Classify centrifugal pump based on 1) Specific speed and 2) Number of blade.
4 M
8 (c)
The internal and external diameter of the impeller of a centrifugal pump is 300 mm and 600 mm respectively. Vane angle at inlet and outlet are 20° and 30°. Water enters impeller radially, velocity of flow over impeller is constant. If the speed of pump is 1200 rpm, find the work done by impeller.
4 M
Answer any one question from Q9 and Q10
9 (a)
What is the difference between a hydraulic turbine and pump? Classify the various types of Turbine.
4 M
9 (b)
Derive the condition for work done and maximum efficiency of Pelton turbine.
6 M
9 (c)
A Pelton wheel has a mean bucket speed of 25 m/s, when a jet of water flowing at rate of 1200 lps strikes the bucket under a head of 250 m? The bucket deflects the jet through 160°. Find the power given to runner and hydraulic efficiency. Take Cv = 0.98.
6 M
10 (a)
What is specific speed of a turbine and derive an expression for specific speed of turbine?
6 M
10 (b)
Why is performance study of turbine necessary and what are the various conditions under which a hydraulic turbine is required to work?
4 M
10 (c)
What is meant by cavitation in turbines ? Explain Thoma Cavitation factor and its significance for hydraulic turbine.
6 M
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