Exam Details
| Subject | Hydraulics And Hydraulic Machines | |
| Paper | ||
| Exam / Course | Diploma In Civil Engineering (DCLEVI) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2016 | |
| City, State | new delhi, |
Question Paper
Differentiate between open channel flow and pipe flow.
What do you understand by rapidly varied and gradually varied flow Also give examples.
Describe specific energy and specific force.
Find the discharge through a trapezoidal channel of width 8 m and side slope of 1 horizontal to 3 vertical .The depth of water flow is 2.4 m and Chezy's C =50. The slope of the channel bed is given as 1 in 4000.
A rectangular channel carries water at a rate of 400 litres/sec. when the bed slope is 1 in 2000. Find the most economical dimensions of the channel, if Chezy's C 50.
The depth of water flow at a certain section of a rectangular channel of 2 m width is 0·3 m. The channel carries a discharge of 1·5 m^3/s. Determine whether a hydraulic jump will occur and if so, find its height and loss of energy per kg of water. If no hydraulic jump is possible, give reasons thereof.
Find the rate of change of depth of water in a rectangular channel of 10 m width and 1·5 m depth, when the flow velocity is 1 m/s. The bed slope is given as 1 in 4000 and the energy line has a slope of 0·00004.
Describe, in detail, the various important efficiencies of a turbine and why such efficiencies are considered important.
What do you understand by Cavitation
Differentiate between the Francis and Kaplan turbines and also give their relative advantages and disadvantages over each other.
Describe the constant speed curve of a turbine.
A Pelton turbine develops 3000 kW under a head of 300 m.The overall turbine efficiency is 83%. If the speed ratio 0·46, Cv=0·98 and specific speed is 16·5, find
the diameter of the turbine
the diameter of the jet.
A turbine develops 9000 kW when running at 140 rpm and under a bead of 30 m. Determine its specific speed.
7. Write short notes on the following:
Hydraulic Jump
Unit Quantities
Characteristic Curves
Velocity Triangles
What do you understand by rapidly varied and gradually varied flow Also give examples.
Describe specific energy and specific force.
Find the discharge through a trapezoidal channel of width 8 m and side slope of 1 horizontal to 3 vertical .The depth of water flow is 2.4 m and Chezy's C =50. The slope of the channel bed is given as 1 in 4000.
A rectangular channel carries water at a rate of 400 litres/sec. when the bed slope is 1 in 2000. Find the most economical dimensions of the channel, if Chezy's C 50.
The depth of water flow at a certain section of a rectangular channel of 2 m width is 0·3 m. The channel carries a discharge of 1·5 m^3/s. Determine whether a hydraulic jump will occur and if so, find its height and loss of energy per kg of water. If no hydraulic jump is possible, give reasons thereof.
Find the rate of change of depth of water in a rectangular channel of 10 m width and 1·5 m depth, when the flow velocity is 1 m/s. The bed slope is given as 1 in 4000 and the energy line has a slope of 0·00004.
Describe, in detail, the various important efficiencies of a turbine and why such efficiencies are considered important.
What do you understand by Cavitation
Differentiate between the Francis and Kaplan turbines and also give their relative advantages and disadvantages over each other.
Describe the constant speed curve of a turbine.
A Pelton turbine develops 3000 kW under a head of 300 m.The overall turbine efficiency is 83%. If the speed ratio 0·46, Cv=0·98 and specific speed is 16·5, find
the diameter of the turbine
the diameter of the jet.
A turbine develops 9000 kW when running at 140 rpm and under a bead of 30 m. Determine its specific speed.
7. Write short notes on the following:
Hydraulic Jump
Unit Quantities
Characteristic Curves
Velocity Triangles
Other Question Papers
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Subjects
- Fluid Mechanics
- Geo-Technical Engineering - I
- Hydraulics And Hydraulic Machines
- Mathematics-Iii