QUESTION 4 [10 MARKS] (a) The warning sign is designed to withstand a maximum wind speed of 80 km / h at sea level. Calculate the total force on a signboard 8 m by 2 m. Assuming wind is flowing perpendicular to the face of the signage.

(b) Compute the range of volume flow rate kerosene at 25°C for which the flow would be in the critical region in a DN80 (2 in) Schedule 40 Pipe and DN80 (3 in) ductile iron pipe.

Discussion topics: Why we use "Base Plate" to connect a column to foundation and what is the role of "Grout" between base plate and foundation?

Calculate the field weights of the ingredients for 0.039 m3 of concrete by using ACI Method of Mix Design. Job specifications dictate the followings:  

Cement content: 300 kg/m3

w/c: 0.57 (by weight, from the strength point of view)

w/c: 0.53 (by weight, from durability point of view)

Fine Aggregate (SSD)/Coarse Aggregate (SSD)=0.45 (by weight)

Air Content: 1,30 %  

For Fine Aggregate (Crushed): SSD Bulk Specific Gravity: 2.47, Total Moisture: 5,0 % and Absorption Aggregate: 2,7 %.  

For Coarse Aggregate (Crushed): SSD Bulk Specific Gravity: 2.60, Absorption Capacity: 2.0 %, Total Moisture: 1.9 % and Dry Rodded Unit Weight: 1470 kg/m3.

Cement: Sulphate Resisting Cement, Specific Gravity: 3.17

Types of Retaining Walls
Identify the importance and application that it represents.

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.