V.R.SIDDHARTHA ENGINEERING COLLEGE
DEPARTMENT OF CIVIL ENGINEERING
ENVIRONMENTAL ENGINEERING-II
CE6002
ASSIGNMENT-II QUESTIONS
1. Explain the working principle and construction of trickling filter with neat sketches.
2. Write about the differences between standard rate trickling filters and high rate trickling filters
3. Explain the operational troubles of standard rate trickling filters and their remedies.
4. a)What is recirculation? Explain the advantages of recirculation.
b) Write about the various types of high rate tricking filters.
5. Explain briefly about activated sludge process.
6. Explain various types of aeration system in activated sludge process with neat neat sketches.
7. Explain the following.
a) Activated sludge b) Return Sludge c) Sloughing d) Mixed liquor
e) Attached growth system and suspension growth system
f) recirculation ratio g) recirculation factor
V. R.SIDDHARTHA ENGINEERING COLLEGE: VIJAYAWADA-7
CIVIL ENGINEERING DEPARTMENT
ACADEMIC YEAR 2011-12 (AUTONOMOUS)
CE-6003 WATER RESOURCES ENGINEERING-II
ASSIGNMENT QUESTIONS-II (A&B Sections)
1. What is Reservoir planning and describe in brief various investigations required for reservoir planning.
2. What do you understand by mass inflow curve and demand curve and how they are prepared?
3. An unregulated river has mean flows in m3/sec as fallows.
Month / Jan / Feb / Mar / Apr / May / June / July / Aug / Sept / Oct / Nov / DecInflow
(m3/sec) / 5.4 / 8.3 / 9.1 / 8.8 / 6.3 / 6.9 / 10.2 / 13.7 / 19.4 / 16.7 / 11.0 / 7.2
What is the storage capacity required to meet a constant monthly demand
of 24 million-m3.Assume all 30 day months.
4. Discuss various methods of reservoir sediment control. Explain the factors
governing the selection of site for a reservoir.
5. Explain how would you determine the reservoir capacity for a specific
yield and safe yield from a given capacity.
6. Explain multi purpose and single purpose flood control reservoirs.
7. Define surcharge storage, Valley storage, safe yield and secondary yield.
8. What is the trap efficiency and how do you estimate the life of a reservoir.
9. What is flood routing and describe the graphical and trial and error
methods of flood routing.
10. Classify various types of dams ,discuss in brief with neat sketches and with
merits and demerits.
11. Explain the physical factors governing the selection of type of a dam and the
factors on which selection of site for dam depends.
12. What is a gravity dam and explain the various forces acting on the gravity
dam.
13. Describe in brief methods of failure of gravity dam.
14. Explain the criteria for stability analysis of gravity dam and also explain
with the help of a diagram.
15. Explain the step by step method of designing high gravity dam.
16. What do you understand by the elementary profile of a gravity dam .Derive
the expressions for determining base width based on i) Stress criterion .ii)
Sliding criterion.
17. Explain the practical profile of a gravity dam.
18. Write short notes on i) Galleries ii) Joints iii) Keys iv) water seals.
19. Design the practical profile of a gravity dam to stone masonry given the
fallowing data.
R.L of the base of the dam = 760m
R.L of H.F.L = 785m
Specific gravity of masonry = 120 t/m2
Height of waves = 1m
20. Check the stability of 100m high concrete gravity dam of trapezoidal in
cross section has upstream face vertical ,crest width 6m,base width 75m and
free board equal to 4m. Neglect all other forces except hydrostatic water
pressure, uplift pressure and self weight. There is no drainage gallery and no
tail water. Also find principal and shear stresses at toe and heel of the
dam. The specific weight of concrete is 2.4 t/m3.Coefficient of friction (µ)
is 0.7 and shear strength of concrete, q= 14kg/cm2.
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VELAGAPUDI RAMAKRISHNA SIDDHARTHA ENGINEERING COLLEGE
DEPARTMENT OF CIVIL ENGINEERING
QUESTIONS FOR ASSIGNMENT – II
CE 6004, DESIGN OF CONCRETE STRUCTURES - II
(A & B Sections)
III/IV B.Tech, Sixth Semester, Batch: 2011-2012
1. Design a reinforced concrete cantilever retaining wall to retain earth level with the top of the wall to the height of 5.5m about ground level. The density of soil at site is 17kn/m3 with a safe bearing capacity of 120kN/m3. Assume angle of shearing resistance of soil as 35º further assume coefficient of friction between soil and concrete as 0.55. adopt M20 grade concrete and Fe415 grade steel.
2.
a) Explain the methods of designing a shear key for a retaining wall
b) Explain the structural differences between the cantilever retaining wall and counter fort retaining wall.
3) Design a cantilever retaining wall to retain a level of earth fill of 4.5 m about the ground level .the surcharge on the earth fill is 15kN/m2.angle of repose of soil is 30º, unit weight of soil is 16 kN/m3.coefficient of friction between soil and concrete is 0.6 and SBC of soil is 150 kN/m2.use M20 mix and Fe 415.
4) A cantilever retaining wall is retaining earth to a height of 5m the soil behind the wall is well drained and having following properties. Density of soil is 18kN/m3.and angle of internal friction is 28º.The bearing capacity of soil is 180kN/m3.The coefficient of friction between base and soil is 0.55.design a cantilever retaining wall use M20 concrete and Fe415 steel use limit state method.
5) Design a reinforced concrete cantilever type retaining wall having a 5m tall stem the wall retains soil level with its top the soils weighs 18kn/m3 and angle of repose is 30º. The SBC of soil is 200kn/m2.the coefficient of friction between base and soil is 0.55.Use M20 concrete, Fe415 steel.
6) The stem of cantilever retaining wall is 4.5m tall retaining soil of specific weight 19kN/m3 and having angle of repose of 30º.The top surface of soil retained is level. Design the wall.SBC of soil is 200kN/m2.Use M20 concrete Fe415 steel, take µ=0.65.
7)
a) Classify different types of retaining walls
b) Describe the structural action of cantilever retaining wall.
c) Explain the stability requirements of retaining walls.
8) Explain clearly the forces on retaining wall and stability requirements of retaining wall.
9) Determine suitable dimension of cantilever retaining wall which is required to support a bank of earth 4.5m above level on toe side of wall .The backfill is inclined at 20º to the horizontal .The SBC of soil is taken as 150kN/m2 at a depth of 1.3m above the ground. The unit weight of backfill earth is 16kN/m3 and angle of surcharge resistance is 30º.The coefficient of friction between soil and concrete is 0.5.use limit state method.
CE 6005 : DESIGN OF STEEL STRUCTURES-II (A & B Sections)
2nd Assignment Questions
1. A roof truss having a span of 10mtrs and subjected to a load coming from roof is 1150 N/m2 and the wind pressure normal to roof is -1200 N/m2 spacing of truss is 5 mtrs. Design (a) Angle purlin and (b) I purlin.
2. Design a roof truss for an industrial shed located at Chandigarh. Height of eaves from ground level is 6.5mtrs and span of truss is 11 mtrs, spacing of truss is 5 mtrs.
3. Design a roof truss for an industrial building located at Hyderabad. Span of truss is 12mtrs and spacing of trusses are 5.5mtrs, slope of truss is 200
ASSIGNMENT-II
(CE 6006)
Transportation Engineering –I
III.B.TECH SECTION-B
1. A sub grade soil sample has the following properties:
Soil 0.075 mm sieve =60%
Liquid Limit = 55%
Plastic Limit= 45%
Design the pavement section by G.I method for heavy traffic with over 400
Commercial vehicles per day.
2. The CBR value of sub grade soil is 8 percent. Calculate the total thickness of flexible
Pavement using
(i) design curve developed by California State Highway Department
(ii) design chart recommended by I.R.C
(iii) Design formula developed by the U.S Corps of Engineers.
Assume light traffic or 3175 kg wheel load and tyre pressure of 5 kg/cm2
3. Find the radius of relative stiffness and radius of resisting section for a concrete slab
From the following data:
Modulus of elasticity of concrete = 3.1x105 kg/cm2
Poisson’s ratio of concrete = 0.15
Thickness of concrete = 18 cm
Modules of sub grade reaction = 8.5 kg/cm2
Wheel load =5100
Radius of Contact Area = 15cm
4. Estimate the thickness of CC pavement using the method suggested by IRC
Modulus of elasticity of concrete = 3.0x105 kg/cm2
Modulus of Rupture of Concrete = 40 Kg/cm2
Poisson’s ratio of concrete = 0.15
Thickness of concrete = 18 cm
Modules of sub grade reaction = 6.0 kg/cm2
Wheel load =5100
Radius of Contact Area = 15cm
Note: Assume necessary data suitably.
5. Calculate the stresses at interior, edge and corner of a cement concrete pavement by : Westegaards Stress equations
Modulus of elasticity of concrete = 3.0x105 kg/cm2
Poisson’s ratio of concrete = 0.15
Thickness of concrete = 18 cm
Modules of sub grade reaction = 8.5 kg/cm2
Wheel load =5100
Radius of Contact Area = 15cm
6. Write the desirable properties of soil sub Grade. Explain CBR method with the help of neat sketches
7. Write the desirable properties of Stone Aggregate. Explain Aggregate Crushing value test and Aggregate Impact value test with neat sketches.
8. Write the desirable properties of Bitumiouns materials. Explain Any Four test of Bitumen
9. Write the desirable properties of Bituminous Paving mixes. Explain Marshal Method of Mix Design
Paper Set By: S.Krishna Rao, Associate Professor, Civil Engineering
CE 6006 : TRANSPORTATION ENGINEERING
ASSIGNMENT QUESTIONS-II
- Explain the CBR method with the help of neat sketches
- Write the desirable properties of Stone Aggregate.
- Explain Aggregate Crushing value test with sketch.
- Explain Aggregate Impact value test with neat sketches.
- Write the desirable properties of Bitumiouns materials.
- Explain Float test and viscosity test of Bitumen.
- Explain softening point test of Bitumen
- Explain plate loas test.