Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 8th Semester (Eight Semester) 2017-18 NCE 052 Analysis And Design Of Hydraulic Structures Question Paper
Printed Paesz03 Sub Code: NCE 052
Paperld: IJIDIDIEIJI RouNo.| | | | | | | | | | |
B.TECH
(SEM VIII) THEORY EXAMINATION 2017-18
ANALYSIS AND DESIGN OF HYDRAULIC STRUCTURES
T ime: 3 Hours T 0tal Marks: 100
Note: Attempt all Sections. If require any missing data; then choose suitably.
SECTION A
1. Attempt all questions in brief. 2 x 10 = 20
a. Explain with neat sketch various type of cross drainage works. Also write the
necessity of cross drainage works.
b. What do you mean by fall and where are they located.
Explain the term Level Crossing, Inlets and Outlets.
Why the silt control is essential at headworks? Explain with neat sketches the
functions and working of silt excluder.
Explain the various storage zones of a multipurpose reservoir with neat sketch.
Explain with neat sketch the difference between weir and barrage.
What are the various types of galleries in gravity dam?
Enlist the various forces acting on a gravity dam?
Differentiate between load factor, plant factor and utilization factor in
connection with hydropower.
j. What are the spillways and where are they provided?
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SECTION B
2. Attempt any three of the following: 10 x 3 = 30
a. Explain the procedure of designing Sarda Type Fall.
b. Explain (i) Aqueduct, (ii) syphon aqueduct, (iii) canal syphon and level
crossing. With neat sketches
0. Explain the mass curve method that can be used for determining:
(i) Reservoir capacity for fulfilling given demand.
(ii) Demand rate from a reservoir of a given capacity.
(1. Explain various forces causing instability in gravity dam; indicate their
magnitude, direction and locations. What should be maximum depth of
elementary profile of a dam if the safe limit of stress on the masonry should not
exceed 1500 kN/ square meter?
e. A run-off river plant is installed on a river having a minimum ?ow of 20
cumecs. If the plant is used as a peak load plant operating only for 8 hours
daily. Compute firm capacity of plant. (i) Without pondage, (ii) with pondage
but allowing 7% water lost in evaporation and other losses. Net head is 16m at
plant. Taking plant efficiency 80%.
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SECTION C
3. Attempt any one part of the following: 10 x 1 = 10
(a) Differentiate between a Silt Extractor and a Silt Excluder. Draw neat sketches
and discuss the principles involved in designing components
(b) Design a Sarda type fall across a canal for the following data:
full supply discharge = 12 cumecs
drop = 1.0 m
full supply level = 104.5 m
full supply depth = 1.5 m
bed width = 10 m
4. Attempt any one part of the following: 10 x 1 = 10
(a) A weir with a vertical drop has the following data:
Nature of bed : coarse sand with value of Bligh?s C=12
Flood discharge : 300 cumecs
Length of weir : 40 m
Height of weir : 2 m
Height of falling water : 0.6 m
Top width of weir : 2.0 m
Bottom width of weir : 3.2 m
Design the length and thickness of aprons and draw the cross?section of the
weir.
(b) Enumerate the different methods which may be used for designing the canal
transition for ?umed canal, and condition under which can be used. Describe in
details a method of designing canal transitions when water depth may or may
not remain constant.
5. Attempt any one part of the following: 10 x 1 = 10
(a) A ?ow net is plotted for a homogenous earthen dam of 30m height with a free
board of 5m. The numbers of potential drops are 10. The permeability in
horizontal and vertical direction are 3X10?4 cm/sec and 2X10?4 m/sec .
Determine the number of ?ow channels for the given discharge of 72X10-6 m3
/sec per meter run of dam. How will you determine the phreatic line for a
homogenous dam provided with a horizontal filter.
(b) What is ?ood routing? Explain the basic ?ood routing equation and summarize
its method of solution.
6. Attempt any one part of the following: 10 x 1 = 10
(a) Explain how uplift considerations affect the design of gravity dam. What
measures can be adopted to reduce the undesirable effects due to uplift in such
cases? Differentiate between rigid dams and non rigid dams.
(b) What do you understand by elementary profile of a gravity dam? Explain step
by step method of scheming a high gravity dam and low gravity dam.
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7. Attempt any one part of the following: 10 x 1 = 10
(a) Give the classification of Hydro?power plants on the basis of their function.
And calculate (1) Total installed capacity,
(ii) Load factor,
(iii) Plant factor
(iv) Utilization factor.
If three generators each of capacity 10000kw have been installed at a hydel
power station. During a certain period of load, the load on the plant varies from
12000kw to 20000kw.
(b) What should be the minimum discharge in the stream so that it may serve as a
peak load station? If a runoff?river plant has an installed capacity of 18000 kW
and operates at 30% load factor when it serves as a peak load station. The plant
efficiency may be taken as 82% when working under a head of 30 m. If the
daily load pattern indicates 16 hours average load and 4 hours peak load,
determine the pondage to be provided to supply daily demand.
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This post was last modified on 30 January 2020