explain the back washing and filtration process in a water treatment plant

Determine the number of lanes required according to Highway Capacity Manual 2010 methodology to achieve a target Level of Service (LOS) of C for a section of a freeway. The section characteristics are the following: rolling terrain, 15% trucks, 2% RVs, PHF = 0.90, AADT = 30,000 veh/day, 50% traffic in the design direction, 12 ft wide lanes, 5 ft right shoulder clearance, 4 ramps in 6 miles. Use 30^th highest hourly volume for design hour volume assuming that the value will be exceeded in 15% of similar locations.

What can we summarize about simply supported beam bridge?

For a BCC iron-carbon alloy that contains 0.15 wt% C, calculate the fraction of unit cells that contain carbon

atoms.

Mr. and Mrs. Dursley of number four, Privet Drive, were proud to say that they were perfectly normal, thank you very much. Unfortunately, someone, or something, had left 13very large, very deep, boot-shaped depressions in their front yard. Each depression has a volume of 1 ft3(for a total volume to be filled with 13ft3). The Dursleys plan to angrily purchase 22 kg (total weight) bags of topsoil from a local store to fill the holes. Each bag of topsoil has a water content of 10%, a total unit weight of 80 pcf, a specific gravity of 2.35 (the soil contains organic matter which has lower specific gravity than mineral soil solids). During transport, you should assume the bags will spill in the back of the Dursley’s Vauxhall Vectra hatchback, therefore the soil will have a looser total unit weigh of 70 pcf with the same 10% water content during transport. Vauxhall Vectra has 16.9 ft3of trunk space. During compaction, the soil is wetted to a 20% gravimetric water content and compacted toa total unit weight of 120pcf (the Dursleys are furious about these holes and take out the anger on compacting soil). The work will be conducted on a Thursday. How many bags of topsoil will be needed to fill these holes?

The main project is : Buying a house.

▪       Explain briefly the life cycle phases of this project and the major elements in each phase.

▪       The work breakdown structure (WBS) answers the question, “What are you going to do?” in each phase. Provide a WBS that answers this question for each of the phases with at least 3 levels of hierarchical breakdown.

▪       Put these activities into a logical sequence. Translate your activities into key milestones. How might you evaluate/measure each of these milestones?

Please help. Thank you.

In soil settlement, why is the recompression index taken from the rebound curve?? Also what is the purpose of a seating load?? THANKS

What are the main design considerations (please include benefits and consequences) associated with stopping, decision and passing site distance?

Ethics Engineering

Generally which is easier to justify?

a.Strong paternalism

b. Weak paternalism

c. Both are equal

d. None of the above

Weak paternalism. The paternalist overrides the decision-making powers of the recipient when there is reason to believe the recipient
is not able to exercise her moral agency effectively.

Strong paternalism. The paternalist overrides the decision-making powers of the recipient, even when there is no reason to believe the recipient is not exercising his or her moral agency effectively.

Please answer the below questions. Thanks.

Kimmswick, Missouri–Illinois
14. What are the gradients of the Mississippi River and of Glaze Creek?

19. Why does Fountain Creek flow some 10 mi south along the floodplain before entering the Mississippi River? What is this feature called?

what is the advantages and disadvantages of having hydropower projects on oceans?

⃗ Find the volume of the solid of revolution obtained by revolving the planeregion bounded by ? = ? − ?²
, ? = 0 about line ? = 2 .

Mathematics Civil Engineering Please solve this question in 15 minutes is necessary

1. You are the Construction Manager for the Design and Build Contractor (and PSCS) for a project involving the construction of a multi-screen cinema and retail complex.
   1. You have had safety concerns in relation to the appointed scaffolding company, over a three weeks period. The issues raising concern include scaffolds being handed over in an unsafe state (missing toe boards, inadequate bracing and ties), scaffold workers operating at height not being tied-off, poor housekeeping and storage of materials on-site. Outline your strategy for dealing with this situation.   

For Environmental Engineering:

1. (i) List at least five water quality characteristics

2. (ii) Compare surface water and groundwater in terms of their typical water quality

   characteristics

3. (iii) Draw annotated diagrams for a typical surface water treatment plant and a typical

   groundwater treatment plant.