An existing four lane section of urban freeway (3 lanes each way) is located in rolling terrain and has 10’ travel lanes, no lateral obstructions within 5’ of the pavement edge. The roadway has 8 ramps upstream and 4 ramps downstream of the midpoint of the six mile analysis segment. The traffic stream contains 10% trucks and buses, and 4% RV’s. The peak hour directional volume is 3200 vehicles with the heaviest 15 minute volume of 800 vehicles. What is the current level of service? f_p=0.95

Consider three vehicles running on a circular track of circumference 2 km. Vehicle A travels at a constant speed of 30 km/h, vehicle B travels at 60 km/h and vehicle C travels at 90 km/hr. Calculate the ratio of space mean speed over time mean speed.

Write down the main cause of leaning of Pisa tower? And how it stabilized. Write it in your own words.

Determine the required shear reinforcing for a simply supported concrete beam 7 meters long with a cross section of 500 millimeters in depth and a width of 380 millimeters. Use fc = 35 MPa fy = 400 MPa. The longitudinal steel uses one row of 25M bars. The specific live load is 29 kKn/m. The beam is not exposed.

1.A 1000 ephemeral stream segment along the Town Creek near Tupelo, MS has a width of 30-m. The difference in elevation of the bottom channel for the upstream to the downstream section is 0.5m. A triangular hydrograph cumulating 10-cm of runoff that begins at 0m3/s reaches a peak of 35m3/s after the first hour of flow and returns to 0m3/s at the time 2.8-hr.If no lateral or overbank inflow is observed along the reach:

a.(15pts) Compute the outflow hydrograph for this reach selecting a time step of 0.1hr, a travel time constant of 0.285 hr and a weighting factor o f0.35.(use 4 decimal places for the outflow hydrograph to determine the routing time to reach the 0m3/s)(As you could submit your routingin Excel, hand/typing calculation are required for the time step that corresponds to your last digit of the net id. If 0 then 10th time step)Hint: The inflow hydrographs should have time steps of 0.1-hr from the beginning to the end.

b.(5 pts) Determine the lag time and peak flow attenuation(difference) observed between inflow and outflow hydrographs.

c.(15pts) Assuming the routing parameters remain constant, compute the outflow hydrograph for the following 1000-m reach segment.(use 4 decimal places for the outflow hydrograph to determine the routing time to reach the 0m3/s)(As you could submit your routing in Excel, hand/typing calculation sare required for the time step that corresponds to your last digit of the net id. If 0 then 10th time step

d.(5 pts) Determine the lag time and peak flow attenuation(difference) observed between inflow and outflow hydrographs.e.(5 pts) Is the runoff volume and the runoff depth changing along the reach? Validate your response with proper calculations and demonstrations.

f.(5 pts) Plot all three hydrographs in one same graph.

An activated sludge plant receive 5.0 MGD of wastewater with a BOD of 220 mg/L. The primary clarifier removes 35% of the BOD. The sludge is aerated for 6 hr. The food-to-microorganism ratio is 0.30. The recirculation ratio is 0.2. The surface loading rate of the secondary clarifier is 800 gal/day-ft2. The final effluent has a BOD of 15 mg/L. What are the (a) BOD removal efficiency of the activated sludge treatment processes (secondary BOD removal), (b) aeration tank volume, (c) MLSS, and (d) secondary clarifier surface area? If 0.5 pound of oxygen is required for each pound of BOD entering the aeration tank and the density of air is approximately 0.075 lb/ft3, and the air is 20.9% oxygen by volume, calculate air requirements per day.

What is the correct statement regarding individuals involved in Health Surveillance?
Select one:

1.   The Responsible Person does not necessarily have specific training in the recognition of potential ill-health
.
2.   The Responsible Person will make a diagnosis of a worker in the absence of an Occupational Health doctor or nurse

3.   If a worker displays any evidence of ill-health, they should be referred to the Occupational Health doctor, nurse, or other Healthcare professional.

4-Occupational Health doctors and nurses are examples of Responsible Persons X

5. 2 and 3 . x

6. None of the above. X

: How the presence of water in soil affects the property of soil and its load-carrying capacity? Also, mention how the seasonal variation of the water content of soil will affect the settlement characteristics of the foundation?

Case study: Impact of infrastructure system.

Topic chosen : japan bullet train ( shinkansen )

what is the Impact of infrastructure system on a society.

Recognize the need and engage in the civil engineering life-long learning process.

Select these three to use it in the report:

1-The natural environment.

2-Economic considerations.

3-Impact due to failure.

Case study: Airport sustainability planning and design.

Airport chosen : Tokyo haneda airport.

Conduct case study on airport sustainability planning.

Comprehend the importance of sustainability on airport planning and design and describe sustainable airport planning initiatives and solution.

Determine the daily primary sludge production during the following wastewater treatment with these operating characteristics:

Flow = 5000 gpm (gallons per minute)

Influent SS = 180 mg/L

Removal efficiency = 60%

Volatile solids = 70% of SS

Specific Gravity of volatile solids = 0.967

Fixed solids = 30% of SS

Specific Gravity of fixed solids = 2.4

Sludge solids content = 5.00%

What is a key difficulty to be overcome when selecting observed seismograms for the design of a structure? Briefly summarize two alternatives.

A ski lift carries a maximum capacity of 100 people/min to a height of 225 feet, calculate the electrical input power required of the motor to meet these conditions if the motor has an efficiency of 85%. Assume the average weight of each person is 160 lb.

A.) 50 kW

B.) 82 kW

C.) 96 kW

D.) 110 kW

1. Consider water flowing upwards through the 22.5^o reducing elbow (22.5^o angle to horizontal axis). If diameters of the elbow at entrance point and exit points are 0.02540 m and 0.01905 m respectively, elbow is 0.1 m high, velocities of water are 5 m/s and 9 m/s at entrance point and exit point respectively, and density of water is 1000 kg/m³_, moment flux correction factor = 1.02.
2. 1. Determine gage pressure at inlet
3. 2. Determine vertical component of force of the system, if weight of the system is 0.2 kg.