STUPIDSID
Solve any one question from Q.1 & Q.2
1
Explain Standard penetration test. What are the various corrections? What is the importance of this test in foundation engineering?
6 M
Solve any one question from Q.1(a,b) & Q.2(a,b)
1(a)
What sound pressure level results from combining the following three levels-65 dB, 78dB and 75dB.
6 M
1(b)
Write a note with a neat sketch on: Fabric filter.
4 M
2
The inner diameters of sampling tube and that of cutting edge are 72 mm and 70 mm respectively. Their outer diameters are 74 mm and 76 mm respectively. Detemine the inside clearance, outside clearance and area ratio of sampler.
6 M
2(a)
Following is the population data for a town, Water supply scheme is to be designed for this town with a design period of 30 years. Find the population at the end of the year 2040 by arithmetical method.
| Year | 1970 | 1980 | 1990 | 2000 | 2010 |
| Population | 48,000 | 59,000 | 67,000 | 76,000 | 89,000 |
6 M
2(b)
Draw a flow diagram of a public water supply scheme and explain each component.
4 M
Solve any one question from Q.3 & Q.4
3
Enlist the aasumptions made in Terzaghi's theory for bearing capacity determination and state Terzaghi's equation for bearing capacity with meaning of each term.
7 M
Solve any one question from Q.3(a,b) & Q.4(a,b)
3(a)
Explain following terms with unit:
i) Weir loading
ii) Overflow rate
iii) Flow through velocity
i) Weir loading
ii) Overflow rate
iii) Flow through velocity
6 M
3(b)
Expalin cascade aerator with a neat sketch.
4 M
4
Write notes on:
a) Bearing capacity of layered soil,
b) Effect of depth on bearing capacity,
c) Effect on ecceentricity on bearing capacity.
a) Bearing capacity of layered soil,
b) Effect of depth on bearing capacity,
c) Effect on ecceentricity on bearing capacity.
7 M
4(a)
Prove that theoretically, the surface loading(Q/A) and not be depth is a measure of effective removal of particles in a sedimentation tank.
6 M
4(b)
Write a procedure for the determination of pH and alkalinity of water.
4 M
Solve any one question from Q.5 & Q.6
5
A clay stratum 6 meters thick has initial void ratio of 1.52 and effective overburden pressure of 125 kN/m2. When the sample is subjected to increase in pressure of 100 kN/m2, the void ratio reduces to 1.45. Determine the coefficient of volume compressibility, compression index and final settlement of stratum.
7 M
Solve any one question from Q.5(a,b) & Q.6(a,b)
5(a)
Acidity introduced by alum dose of 90mg/ lit is to be neutralised using lime as CaO. Commercial CaO available is of 85% purity. Work out the quantity of the commercial CaO required in kg/day, if the raw water to be treated is 5 MLD.
8 M
5(b)
Draw a neat sketch of a rapid sand gravity filter and show various components.Expalin mechanisms of rapid sand gravity filter.
8 M
6
Explain with a neat sketch, logarithm of time fitting method for determination of coefficient of cosolidation.
6 M
6(a)
A water treatment palnt treats 200m3/hr. Of water. Work out the following with respect to flocculator:
i) Dimensions of flocculator unit
ii) Power input by paddles to water.
iii) Size and number of paddles. Assume μwater= 0.89×10-3N.s/m2.
i) Dimensions of flocculator unit
ii) Power input by paddles to water.
iii) Size and number of paddles. Assume μwater= 0.89×10-3N.s/m2.
8 M
6(b)
Explain with a neat sketch diffused double layer theory.
8 M
Solve any one question from Q.7(a,b) & Q.8(a,b)
7(a)
What is break point chlorination? Explain with figure What are its advantages?
8 M
Solve any one question fromQ.7(a,b,c) and Q.8(a,b,c)
7(a)
Explain pile load test with its limitaions.
6 M
7(b)
Explain adsoption technique with sketch for removal of odour and colour.
8 M
7(b)
Determine the capacity of pile by using following data. Diameter of pile = 600 mm, length = 7m, φ=30° soil density = 17 kN./m3, c= 20 kN/m2, reduction factor α= 0.5, Nc =65, Nq= 35, Nγ=18, factor of safety =3.
5 M
7(c)
Enlist the types of piles according to function.
5 M
8(a)
What do you mean by disinfection? Discuss the factors affecting efficiency of disinfection. Enlist at least four disinfectants used in water treatment plant and disucss anyone in detail.
8 M
8(a)
A group of piles consists of 15 piles arranged in three rows and five columns. Compute the efficiency of pile group by-Felds rule.
5 M
8(b)
Explain zeolite process in detail with neat sketch.
8 M
8(b)
What is Ciassion disease? How it is controlled?
6 M
8(c)
What do you understand by 'Till' and 'Shift'? What are the remedial measures to rectify the same?
6 M
Solve any one question from Q.9(a,b) & Q.10(a,b)
9(a)
Write a short note on:
i) Reverse osmosis
ii) Packaged water treatment plant
i) Reverse osmosis
ii) Packaged water treatment plant
9 M
Solve any one question fromQ.9(a,b,c) and Q.10(a,b,c)
9(a)
Calculate the factor of safety of a cantilever sheet pile with the following details.
i) Length of sheet pile = 8m.
ii) Depth of embedment = 5m,
iii) Angle of internal friction of soil = 30°.
i) Length of sheet pile = 8m.
ii) Depth of embedment = 5m,
iii) Angle of internal friction of soil = 30°.
5 M
9(b)
Explain the following layout systems for water distribution:
i) Tree or Dead end system
ii) Ring or Circular System
i) Tree or Dead end system
ii) Ring or Circular System
9 M
9(b)
What is cofferdam? Where they are used?
5 M
9(c)
Discuss any three types of cofferdams.
6 M
10(a)
Find required balancing capacity of the reservoir by analytical method for the following data:
Population: 1.0million.
System of water supply: continuous
Rate of water supply: 270lit/capita/day. Break-up of water demand is as follows:
Water is supplied from the treatment plant at a uniform rate 11.25 million lit/ hour for all 24 hours.
Population: 1.0million.
System of water supply: continuous
Rate of water supply: 270lit/capita/day. Break-up of water demand is as follows:
| Sr.No. | Time | Liters per capita |
| 1 | 7 am to 1 pm | 100 |
| 2 | 1 pm to 5 pm | 45 |
| 3 | 5 pm to 11pm | 95 |
| 4 | 11 pm to 2 am | 20 |
| 5 | 2 am to 7 am | 10 |
| TOTAL | 270 |
Water is supplied from the treatment plant at a uniform rate 11.25 million lit/ hour for all 24 hours.
9 M
10(a)
Explain 'vibroflotation technique' of soil improvement.
5 M
10(b)
What do you mean by rain water harvesting? Write a necessity if rain water harvesting system. Draw a sketch of 'Roof Top Rain Water Harvesting System for a bungalow.
9 M
10(b)
Explain 'swelling pressure test' with neat sketch.
5 M
10(c)
State and explain various design principles to be followed during construction of foundation on black cotton soil.
6 M
Solve any one question fromQ.11(a,b,c) and Q.12(a,b,c)
11(a)
What are the advantages and disadvantages of geosynthetics over conventional materials?
6 M
11(b)
Explain any three types of geosynthetics.
6 M
11(c)
Explain the use geosynthetics in bearing capacity improvement.
5 M
12(a)
What do you mean by 'Liquefaction'? What are its effects on built environment?
6 M
12(b)
Explain different types of seismic waves.
6 M
12(c)
Explain how 'liquefaction susceptibility' of a soil is determined?
5 M
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