A long segment of the suburban freeway is to be designed on level terrain. The level segment, however, is followed by a 4.5% grade, 2.0 miles in length. If the DDHV is 2,500 veh/h with 15% trucks (standard mix), how many lanes will be needed on the (a) upgrade, (b) downgrade, (c) level terrain segment to provide for the level of service C? Lane widths and lateral clearances may be assumed to be 12 ft and 6 ft, respectively. Ramp density is expected to be 1.0 ramps/mi. The PHF is 0.92. Good weather, no incidents, no work zones, and regular users of the facility may be assumed.

Design rapid sand filters for a water treatment plant to treat a flow rate of 25 mgd. Use 1.5 for a peak factor. Consider the location of overflow troughs, freeboard, and pressure head of water. Assume that the length of the filters is 2 times the width and that the filtration rate is 3 gpm/ft2. Assume anthracite over sand with 1 ft gravel under media, top of water level during filtration is below troughs, and a 3 ft head drop between bottom of rapid sand filters (bottom of gravel) and top of water in chlorine contact basin.

a. Determine how many parallel filters should be used

b. Design the dimensions (width, length, depth) for one rapid sand filter in the process train and draw features (media, gravel, underdrain, overflow troughs, freeboard, pressure head, and water level in chlorine contact basin) and draw a simple diagram of the rapid sand filter.

c. Using a backwash rate of 12 gpm/ft2 for 15 minutes, what is the volume of water used in each backwash?

solve all with clear steps please

For a 10 x 10 Eastern White Pine, Select Structural (NELMA) timber column with an unsupported length of 14 ft, with both ends pinned;

assuming

Permanent duration

Wet condition

Normal temperature

Determine:

Compare the following 3 alternatives using the incremental benefit/cost ratio method. Determine which is the most efficient and which is the most profitable. i=5% per year compounded yearly.

3 survey crews completed differential level loops. The total distances and misclosures were: Crew 1 : Distance of loop = 896m; misclosure = 0.025m Crew 2 : Distance of loop = 543m; misclosure = 0.016m Crew 3 : Distance of loop = 761m; misclosure = 0.024m

alculate the maximum 3^rd order allowable accuracy for each crew; i) Crew 1 , ii) Crew 2 , ii) Crew 3 , iv) which crew did not acceptable 3rd order accuracy for their level loop?   

We have discussed several types of shoring. If we have a certain project, when should we do the shoring using sheet piles, Contiguous Piles, Secant Piles, Soldier Beams and Lagging, or Diaphram Walls? Compare between these different types and list the criteria at which we choose the appropriate shoring system for any project.We have discussed several types of shoring. If we have a certain project, when should we do the shoring using sheet piles, Contiguous Piles, Secant Piles, Soldier Beams and Lagging, or Diaphram Walls? Compare between these different types and list the criteria at which we choose the appropriate shoring system for any project.

why a typical concrete structure is designed to assure that all of its sections behave in stage 2 under working loads?

Draw the following network,

1. Draw the precedence Network for the following project
2. Find ES, EF, LS, LF, TF and FF for each activity.
3. Which activities in the project are on the critical path

Note: If the relationship type is not mentioned, it is FS. If no lag/lead is mentioned, it is zero.

You are analyzing a 40 FT long simply supported beam (b = 10 IN, d = 21.5 IN, h = 24 IN) in an existing building. The dead load on this beam is 1.2 KLF and you are tasked with deciding whether a load of 2 KLF of live load can be applied in addition. Based on the original plans, you think that the compressive strength of the concrete f’c = 3000 PSI and the yield strength of the rebar is 40 KSI. The existing stirrups are #3 bars (2 legs) at 9” centers along the entire beam.

American Airlines. (AA) is an airline that operates direct, daily flights between Los Angeles (LAX) and London Heathrow (LHR) airports. AA offers only business-class tickets and service on all of its flights. On the LAX-LHR route, AA flies Airbus 320 plane configured to have a capacity of 100 business-class seats.

AA sells tickets on LAX-LHR route at $3000 and offers a generous, 90% “last-minute cancellation” policy. In particular, under such policy, a customer may cancel her flight up to 30 minutes before the departure time and receive back 90% of the $3000 fare she paid. As a result, AA is able to sell many more tickets than its plane capacity. The downside is that customers who purchased tickets may not all show up for the flight.

To better manage the profitability of its LAX-LHR route in the presence of last-minute cancellations, AA uses “overbooking,” that involves selling more tickets than 100 seats on its plane. In particular, AA would like to compare two overbooking options: 1) selling T=110 tickets, and 2) selling T=115 tickets. AA is confident that, given the moderate business-class fare it charges and a generous cancellation policy it offers, it can always sell those numbers of tickets.

The sequence of events in the presence of overbooking is as follows:

·Tickets are sold to T potential passengers at the price of $3000 each

·At about 30 minutes prior to departure, the number of customers who actually show up for the flight, A, is revealed (0≤A≤T) and the refund of $2700 is paid to each of T-A customers who did not show up

·If A≤ 100, the plane takes off with A customers on board

·If A>100, the airline asks for A-100 volunteers to release their seats and to accept alternative flight arrangements, for additional compensation. As a result of this process, the airline pays to each of A-100 volunteers the compensation of $5000, and the plane takes off with 100 customers on board.

Thus, the revenue that AA earns for a particular flight depends on the values of T and A, and consists of three components: the initial revenue from selling tickets minus the refund, if any, paid for last-minute cancellations, and minus the additional compensation, if any, paid to customers asked to release their seats.

1) Suppose that AA decides to use Option 1 (i.e., sell T=110) tickets, and the number of customers who show up for the flight is 100. What is the revenue that AA will earn for this flight, in $? Round your answer to the closest integer value.

2) Suppose that AA decides to use Option 2 (i.e., sell T=115) tickets, and the number of customers who show up for the flight is 105. What is the revenue that AA will earn for this flight, in $? Round your answer to the closest integer value.

3) Zero Management is a business analyst working for AA who was assigned a task of comparing the two overbooking options described above. Zero has decided to design a simulation model that assumes that each of T customers who bought tickets has a probability of 0.9 of actually showing up for the flight, and that each customer makes a decision to show up for the flight independently of other customers. A statistician working for AA explained to Zero that, under these assumptions, the number of customers who actually show up for the flight, A, is a binomial random variable that can take integer values 0,1,2,… T, and that has the expected value of 0.9*T.

Suppose that the AA decides to use Option 1 (T=110). Let A be the number of customers who actually show up for the flight under this option. The algebraic expression for the revenue that AA earns for this flight, in $, is

a)   330,000 – 2,700*(100-A) – 5,000*IF(A<100, 0, A-100)

b)  330,000 – 2,700*(110-A) – 5,000*IF(A<110, 0, A-110)

c)   330,000 – 2,700*(110-A) – 5,000*IF(A<100, 0, A-100)

d)  330,000 – 2,700*(100-A) – 5,000*IF(A<110, 0, A-110)

4) Consider Option 1 (T=110). If it is possible for A to take integer values 0,1,2,…,110, what is the maximum possible revenue, in $, that AA can earn for a flight? Choose the closest value.

a)   330,000

b)  303,000

c)   300,000

d)  280,000

e)   270,600

5) Consider Option 1 (T=110). If it is possible for A to take integer values 0,1,2,…,110, what is the minimum possible revenue that AA can earn for a flight? Choose the closest value.

a)   303,000

b)  280,000

c)   270,600

d)  33,000

e)   0

write a report on the below topic given with following instruction

Topic: mechanical evaluation of asphalt mastics produced using waste stone sawdust.

get familiar with the design and/or construction of sustainable /eco-friendly flexible pavements and recognize the need and engage in the civil engineering life-long learning process.

Introduction.

Summary.

Objectives and history.

project details.

Impact of the sustainable/eco-friendly approach (advantages and disadvantages).

conclusion.

A reinforced concrete beam of normal weight concrete with an effective depth of 20 IN and a width of 12 IN is reinforced with 3 IN2 of grade 60 (fy = 60 KSI) rebar. The beam has a concrete compressive strength f’c of 3000 PSI.

(a) Determine the maximum ultimate moment which can be applied to the beam.

(b) If the only dead load on the beam is self-weight, determine the allowable uniformly distributed live load which can be applied to the beam. Assume an 18 FT span (simply supported) and 2.5 IN of cover over the reinforcement.