What are some environmental issues in landfills regarding leachate and gas generation, i.e. the difference between an open pit and a ‘sanitary’ landfill and what processes occur in the decomposition of garbage?

Mr. Phiri has been awarded a contract of supplying coarse aggregates to Junxi Engineering company who
are working on Lusaka-Ndola dual carriage way. One of the condition for Mr. Phiri to supply the coarse
aggregates is having his own quarry site and to employ a material’s Engineer for quality control purpose
and technical advice. The material’s Engineer will give guidance on site selection for coarse aggregates
which will be presented to the main contractor Junxi Engineering Company. You have been engage by Mr.
Phiri as a Material’s Engineer and the first task is to give him a report on the site selection for the quarry
site.
a. Write a technical report to Mr. Phiri on the site selection of the aggregates.
b. What is aggregate gradation, how is it carried out and its importance in concrete production for Civil
Engineering projects?
c. Propose material to use for access roads for the entrance and give reason for selecting that material

d. What are air-entraining agent and what properties of concrete will be affected if air-entraining agent
is added?

The Zambian Government has embarked on various developmental projects throughout the country. The
projects include Water and Sanitation, Roads, Schools and Hospitals. Private companies have also invested
in shopping malls in various parts of the country. This has resulted in a boost for the construction industry.
a. Discuss why there is an increase in the use of steel as compared to concrete in most of the building
works around the country under construction.
b. Consider the iron value chain from material extraction to disposal, at what point according to your
assessment is the most energy used? As a design engineer, at what stage do you think is your
intervention most important and what role can you play in making iron more sustainable?

c. One of the project which the Government is implementing is the water project in Western Province
of Zambia particularly Mongu District. Two surface concrete reservoirs of 1.5 Mega litres each will
be constructed within the Central Business District (CBD). Since the site is within the CBD, the wall
fence should be built and source of sand for block moulding will come from the same site as the area
is sandy and it is quite large. As a material/site Engineer advice on the type of material, construction
and precaution which should be considered for this project.
d. Some works which have already been completed for the water project especially buildings
constructed of concrete roofing have started leaking after 1 year. What could be the possible causes
of leaking roofs and how can this be sorted out.

Design of circular slab with simply supported condition.

Effective span = 5.4 m c/c

Floor finish = 1.5 kN/m2

Imposed load = 3 kN/m2

Characteristic strength of concrete (fck) = 35N/mm2

Characteristic strength of steel (fyk) = 500 N/mm2

Assume cover

Environmental issues have become critical concerns of businesses in recent years. Therefore, Environment Ministries in different countries is urging organizations to consider adopting the ISO 14000 Environmental Management Standards. Evaluate FOUR (4) challenges among the Malaysian companies to receive ISO14000 so explaining in detail ?

2. There are two primary methods of building up a solution to an engineering model, 1) analytical, and 2) numerical. Provide a description of each of these methods, explaining in detail what they are being employed for, when they would be employed, and why a given method would be employed rather than the other. answer should be relavent to engineering system unit please.

A 1000 litre containment tank catches the outflow from a processing apparatus which has 800 litres of water with 2 g of chemical agent dissolved in it. Additional supply comes into the tank at 3 litres/hr containing 5 g/litre of the chemical agent. The solution leaves the containment tank at 3 litres/hr. When the amount of chemical agent in the containment tank reaches 500 g, no more supply is allowed to enter the system. Instead, fresh water is input into the tank at 2 litres/hr; and at the same time, the outflow is increased to 4 litres/hr. How much chemical agent is held in the containment tank at any time t. Assume all liquids are well-mixed. (10 marks.) Please provide the explanation of the method and as much as step uh can with proper calculation.

1. Provide a detailed explanation of the process that should be taken when testing an engineering model. In your explanation describe what you are doing at each step and why you are doing it. please provide answer related to engienerring system unit

can you give me a conceptual framework on the research topic "Impact Of Variation Order in Construction Project?"

In your city, the number of traffic accidents is relatively large, propose a step by step procedure to improve traffic safety

Mode of instability in rock mass is mostly controlled by the orientation and type of discontinuities. Thus, the selection of stabilization must be made based on the mode of instability. Answer the following question:
a) Name FOUR (4) basic mechanisms of rock slope instability.


b) List the THREE (3) main parameters that control the stability of a    jointed rock slope.

It is a common practice to install rock bolt together with cement grout. For an unstable slope face why such practice is highly recommended. What is the purpose of cement grout in rock bolt installation?

An area of 200 ha will be used to grow Alfafa (47 ha), Corn (70 ha) and Tomato (83 ha). The latitude of the area is 380 N. If the monthly temperatures for July, August and September are 21, 20, and 190 C, respectively, calculate the total consumptive use by Blaney-Criddle.          

At the end of the CD triaxial pressure experiment on a normal consolidated clay, the sample was defeated along a plane of 570. When another sample with the same properties was tested in the CU experiment, the pore pressure in the defeat was measured as 85 kPa. According to the cell pressures (63) 200 kPa in both experiments;
a) At the end of the A = CD experiment, find the effective internal friction angle and the difference in prime stress.
b) At the end of B = CU experiment, find the total angle of internal friction and angle of defeat plane.
c) In the C = CU test, find the shear strength in the plane of failure.