Field conditions require a highway curve to pass through a fixed point. Compute a suitable equal-tangent vertical curve and full-station elevations for grades of g1 = −2.50% and g2 = +1.00%, VPI elevation 750.00 ft at station 30 + 00. Fixed elevation 753.00 ft at station 30 + 00.

You have been hired as a consultant to assess the impact of a spill of 10 kg of chlorobenzene in a river adjacent
to a small town. The average width is 20m, average depth is 2.4m, and has a discharge of 8.7 m3/s. The
average water temperature is 22 °C, the average air temperature is 27 °C, and the average wind speed is
4.25 m/s. The suspended solids concentration has been measured at 7 mg/L, Kd for chlorobenzene is 4.27 cm3/g,
and the average sedimentation velocity is 0.8 m/d.
(a) Assess the impact of the spill on the town’s water supply intake 1 km downstream of the spill location.
Please compare this value with the EPA’s MCL for chlorobenzene.
(b) Investigate the relative importance of volatilization and sedimentation on the expected concentration of
chlorobenzene at the water-supply intake.
(c) If the city engineer decides to shut down the water-supply intake when the river water at the intake
exceeds the drinking water standard, for approximately how long will the intake be shut down?

You are field manager for the general contractor on a multi-story office building under construction. The project has risen all 15 floors above the foundation. The roof is on and the exterior façade of the structure, consisting of alternating blue glass ribbon windows and red granite panels, has “dried in” the project many weeks ago. On the third, seventh and fifteenth floors, the executive offices located on the corners of the building have blue glass doors that lead outside to small balconies. Interior work (walls, electricity, hvac, water, sewer, sprinker, suspended ceiling, millwork, carpet, etc.) is well under way on several of the lower floors. After carefully checking the blueprints, shop drawings and bulletin drawings completed and approved by Architects & Engineers, the superintendent for the plumbing contractor stops by your office to mention that the design doesn’t seem to provide for floor drains on the exterior balconies. A quick conversation with the architect reveals that a serious design error has occurred. Floor drains and the necessary piping will need to be retrofitted that tie-in to the vertical pipe for the roof drain, located near the center of the building. There is vertical air space (plenum) available (approx. 2 feet) on each floor between the bottom of the concrete floor slab above and the top of the ceiling grid that can be used to route the connecting pipes to each balcony drain. However, many specialty contractors have already installed their work on several floors in the plenum space. Another problem is the length of connecting piping needed for each balcony drain. Following the minimum slope for the drain pipe allowed by building code, the distance is so great from each balcony to the vertical roof drain in the center of the building that the connecting pipe would be visible below the ceiling grid, which is not acceptable to the project owner. So, the piping for each balcony drain will have to be routed at the minimum slope above the ceiling grid partway to an interior column, where a vertical pipe and floor penetration will be needed. Each balcony drain pipe will continue in the plenum space on the floor below in order to reach the roof drain. The vertical piping next to certain interior columns can be hidden with studs and drywall. In this manner, each of the retrofitted balcony drains can connect to the vertical roof drain pipe without being visible in the interior office space on each floor.

List Five things/actions that you as a Manager could do to keep the project going and solve the problem as well as what parts and how could your Schedule be affected:

Another Problem would be Who Pays: Who and Why?

1) Timber formwork and shoring support a cast-in-place concrete slab during curing. The 9 inch concrete slab is placed on the ¾ inch plywood supports that are supported by 2 x 4 joists spaced 16 inches apart. 4 x 6 stringers spaced 36 inches apart support these joists. The shores directly underneath the stringers are 4 x 4 and are spaced at 5 ft intervals along the stringers. The lumber is No. 2 Douglas Fir Larch. The concrete has a specific weight of 150 pcf and a construction live load of 50 psf. Limit all deflection to l/360. [Weight of forms, estimated = 7.5psf]

You are asked to:

1. Check the joist spacing of 16 in.                                                 

2. Check the stringer spacing of 36 in.                                            

3. Check shoring space of 5 ft along the stringer.                         

What are the common forms of sulfate ions present in natural and industrial environment? Write the chemical reactions involved in each case during the sulfate attack.

A road is built with a vertical transition curve. The PVC is at 111+05 and elevation of 322. The PVI is at 111+85 and elevation of 320. Low point of curve is at 111+65.

Find starting grade? Ending grade? Design speed of curve? Elevation of low point on curve?

Identify and discuss the major people and events associated with the Civil Rights Movement in the 1950s and 1960s. Be sure to support your generalizations with specific examples.

▪ Describe how fluid mechanics govern the design of MOSE project and Thames Barrier project (detailed explanation)

“Most national and international engineering organizations create, maintain, and distribute codes and standards
that deal with uniformity in size of parts and correct engineering design practices so that public safety is ensured.”
Explain briefly, why and how the Standards and Codes insure the public safety. Provide one example.

Using this table, please fill the table, draw the stress strain curve and then answer the question.

In case where the load is released at point 1 and 2 Draw and show the permanent and the recovery deformations.

1. Calculate the Yield stress in the wire

2. Calculate the apparent maximum stress in the wire   

3. Calculate the apparent broken stress in the wire   

4. Calculate its modulus of elasticity   

5. Calculate the elastic deformation

6. Calculate the plastic deformation   

7. Calculate its axial deformation e_z at the linear part

8. Calculate its radial deformation e_x at the linear part   

1. Calculate its Poisson’s ratio at the linear part                                        

1. A company is currently located in Rafah and employs 50 people. Due to strong growth the company needs additional office space. The company has the option of renting additional space at its current location in Rafah for the next two years, but after that will need to move to a new building. Another option the company is considering moving the entire operation to Jabalia immediately. A third option is for the company to rent a new building in Rafah immediately. If the company chooses the first option and rent new space at its current location, it can, at the end of two years, either rent a new building in Rafah or move to Jabalia.

          The following are some additional facts about the alternatives and current situation:

• The company has a 75 percent chance of surviving the next two years.
• Renting the new space for two years at the current location in Rafah would cost $750,000 per year.
• Moving the entire operation to a Jabalia would cost $1 million. Renting space would cost $500,000 per year.
• Moving to a new building in Rafah would cost $200,000, and renting the new building’s space would cost $650,000 per year.
• The company can cancel the rent at any time.
• The company will build its own building in five years, if it survives.
• Assume all other costs and revenues are the same no matter where the company is located.

WHAT COULD THE COMPANY DO?

1. Explain the basic treatment categories for hazardous waste.

2. Determine the compacted waste to soil ratio (by volume) for an assumed compacted waste density of 500 kg/m3. The design disposal rate is 60 tons per day. The cell height and width will be 3.0 m and 5.0 m respectively. Take the slope of working faces as 3 horizontal to 1 vertical. The prescribed daily soil cover thickness is to be 200 mm.

3. It is mandatory that a civil engineer research a potential site and then design a construction and operation plan based on local geological characteristics before an operator can safely build a landfill. You have to design a new landfill with a 25 year lifespan. Determine the compacted landfill waste volume, the cover soil volume required and the landfill footprint area. The soil burrow pit is estimated to be 5 m deep. The solid waste generated per capita average 3.0 kg/day. The initial rate of deposition is 200 tons/day. The population growth rate is 2% per annum. The estimated compacted density of the waste at the site is 700 kg/m3. The minimum buffer zone to the landfill is to be 500 m. Assume a volumetric ratio of cover material to compacted waste of 1:4. Assume an 8 hectare allowance for landfill facilities.

4. Anaerobic digestion and aerobic digestion are processes that breakdowns biodegradable material. Discuss the application for this processes with regards to solid waste management

5. Describe the mechanical biological treatment system and state five possible advantages of this system.

6. The “waste hierarchy” ranks waste management options according to what is best for the environment. Describe the waste hierarchy.

7. Determine the classification of a landfill that yields evaporation records of 2 200 mm per year and rainfall of 600 mm per year. The site receives only general waste from a rural community and the estimated current disposal rate is 0,80 Tons per day. The site life is expected to be 7 years.

8. The final cover of a landfill functions as a way to keep water out of the contaminate and to control the runoff from entering the system. Draw an annotated drawing of a class G: L: B - landfill.

9. State and discuss the role of MRFs in an Integrated Solid Waste Management System

1. Discuss potential negative effects of Municipal Solid Waste.

2. Discuss the importance of managing the quantity of Municipal Solid Waste generated.

3. Discuss the best method of Municipal Solid Waste quantity estimation and supply an appropriate relationship with explanation of variables.

4. In the landfill classification system, a landfill is classified in terms of three characteristics, all of which influence the risk it poses to the environment. Describe these characteristics.

5. Leachate is a widely used term in the environmental sciences where it has the specific meaning of a liquid that has dissolved or entrained environmentally harmful substances that may then enter the environment. It is most commonly used in the context of landfilling of putrescible or industrial waste. Under which conditions will it not be necessary to install al landfill leachate system?

6. Solid waste generation and characterisation are some of the most important parameters which affect environmental sustainability. Municipal solid waste characterization depends on social structure and income levels. Discuss the purposes of Solid Waste Characterization.

7. The greater the density of the waste in a landfill, the more tons of waste can be disposed in the landfill. The density of waste in a landfill can be increased in a variety of ways. Discuss three methods.

8. The local municipality consulted you to advice on a recycling programme to be introduced. How will you address the implementation of such a programme?