1. Formulas for swelling potential involving atterberg parameters. explain the terms with an example

a. what foundation would you recommend on a soil with a high moisture content at the surface but moderate at around 3.5m for a 5-storey airport building and why that foundation

b. What can be a recommendation for the design and construction of an airport pavement? What factors are taken into consideration to achieve this

Al Amerat landfill is the first engineered sanitary landfill in Oman which began its operations in early 2011. The landfill site consists of many landfills; the first landfill is expected to complete in the end of this year. Good landfill restoration provides an opportunity for landfill operators to promote public acceptance of landfills. Restoration is a process which will return a site to a condition suitable for its proposed after use whilst incorporating measures to protect human health and the environment. Suggest Closure, Post Closure Plan and Landfill Aftercare Plan and After Use for the first landfill in Al Amerat. (Solid waste related issues)

a) What is weathering? In detail the effects of weathering on the engineering properties of rocks.
Please explain.
b) Describe the RMR and Q-rock mass classification systems. Use of these systems
Specify the fields.

Course AB of a five sided traverse runs due north. From the given balanced interior angles to the right, compute and tabulate the bearings and azimuths from north for each side of the traverses in problem. A = 77 DEG. 23' 26" B = 125 DEG. 58' 59" C = 105 DEG. 28' 32" D.= 116 DEG. 27' 02" E. = 114 DEG. 42' 01"

An affluent suburb in Johannesburg with a population of 35,000 has a solid waste generation rate of 2.3 kg solid waste/day-person. Garden refuse makes up 23% of the total waste generated (by weight). Garden refuse is managed by a composting company who collects the refuse separately. Assume the average density of the solid waste is 140 kg/m3 and is compacted to 340 kg/m3 in the waste collection truck that collects the waste at the home. Once the waste is disposed of in the landfill, it has a density of 220 kg/m3 .

a) Argue why affluent suburbs generate more waste than less wealthy suburbs.

b) Given that the municipal landfill only receives waste from the suburb and has a total available volume of 300 000 m3 remaining, determine how long (in months) will it take to reach the maximum capacity of the landfill.

Case study of failure concrete structures, select 1 case and discuss in a report whith showing picture of the failure (4 pages minimum)

Question: Consider yourself as a member of parliament in your constituency. The government has approved 2 million dollars for you to use to undertake housing upgrading in your constituency. Discuss five possible challenges you are likely to face in the implementation of the project. You are also required to propose possible solutions to each of the problem.

A new residential complex in Starkville will be supplied with 2.674 ft3/s at a pressure of 3600
lb/ft2. The piping system will be connected to the main city supply line (9360 lb/ft2), which has
10‐ft of elevation difference with the city line. Determine the corresponding pipe size to connect
the apartment piping system to the city line. The design considers the use of PVC (ks=5*10‐7 ft).
The system consists of 100‐ft of pipe, 4 threaded 90 elbows (kL=1.5), 10 threaded unions
(kL=0.08) and a swing check valve (kL=2.0). Consider water density to be 62.42lb/ft3 and the
dynamic viscosity to be 2.34*10‐5 lb*s/ft2.

1. What are the two advantages of tube settler as compared to the conventional sedimentation?

2. Compare the following factors for chlorine and ozone

1. Disinfection time and dose
2. Residual disinfection
3. Interference by raw water turbidity
4. THM formation

3. The water from a river used for water supply contains 6 mg/L of BOD₅, 2 mg/L of aldrin (pesticide residue) and 14 NTU of turbidity. Suggest a treatment process which is technically and economically viable. Explain the reason why you selected this treatment system?

4.Under what conditions is powdered activated carbon preferred over granulated activated carbon adsorption system? and Why?

5.Explain two situations where the dissolved air flotation (DAF) is preferred over a sedimentation tank in drinking water treatment.

1a). For a single, handheld, GPS receiver operating in point positioning mode: i. Explain how the receiver uses signals from four satellites to determine its position on Earth. ii. Approximately what East, North and Height accuracy would you expect from this receiver? iii. What are the main factors that limit the positioning accuracy of this receiver? (b) What techniques are used to overcome the spatial accuracy limitations of a single, handheld, GPS receiver operating in point positioning mode?

Design the concrete mix according to the following conditions: Design Environment Caissons for Bridge pier crossing to the Outer Bankers, NC Required design strength=4800psi

Minimum dimension = 12 in.

Minimum space between rebars = 2.5 in.

Minimum cover over rebars = 2.5 in.

Statistical data indicate a standard deviation of compressive strength of 250 psi is expected (more than 30 samples).

Only air entrained is allowed. Available Materials Air entrainer: Manufacture specification is 0.15 fl oz/1% air/100 lb cement.

Aggregate: 1 in. nominal maximum size, crushed stone

Bulk oven-dry specific gravity=2.45,absorption=2.5%

Oven-dry rodded density=125pcf

Moisture content=1.5%

Fine aggregate: Natural sand

Bulk oven-dry specific gravity=2.61,absorption=3.4%

Moisture content=3.8%

Fineness modulus=2.81

1. Calculate the strength requirements.(psi)

2. Part 2: Determine the water to cement ratio.

3: Calculate the volume of coarse aggregate (lb/yd^3)

4: Find the air content percentage (%)

5: Determine the workability.

Use A992 and select a W shape for the following beam:

- Simply supported with a span length of 30 ft

- Braced at the ends of the beam only

- Uniform dead load of .75 kips

- A 34 kip point load at midspan

Use ASD

following facilities the trickling filter, and the Aeration basion are used for clarification of water and wastewater during treatment.

Write short notes on each one of them with more emphasis on the similarities and differences

in treatment processes, advantages and disadvantages between them.

Design the concrete mix according to the following conditions: Design Environment Caissons for Bridge pier crossing to the Outer Bankers, NC Required design strength=4800psi

Minimum dimension = 12 in.

Minimum space between rebars = 2.5 in.

Minimum cover over rebars = 2.5 in. Statistical data indicate a standard deviation of compressive strength of 250 psi is expected (more than 30 samples).

Only air entrained is allowed. Available Materials Air entrainer: Manufacture specification is 0.15 fl oz/1% air/100 lb cement.

Aggregate: 1 in. nominal maximum size, crushed stone

Bulk oven-dry specific gravity=2.45,absorption=2.5%

Oven-dry rodded density=125pcf

Moisture content=1.5%

Fine aggregate: Natural sand

Bulk oven-dry specific gravity=2.61,absorption=3.4%

Moisture content=3.8%

Fineness modulus=2.81

6: Calculate the desired water content (lb/yd^3)

7: Calculate the Cement Content (lb/yd^3)

8: Calculate the admixture requirements.(fl oz/yd^3))

9: Calculate the weight of the Fine Aggregate.(lb/yd^3))

10: Calculate the new water requirement based on the moisture corrections (lb/yd^3)

Calculate the flow depth in a rectangular riveted steel open channel with a width of 6.1 m and a slope of 0.0001, since the water flow is 6.8 m3/s.