Question 5 (1 point)

Match the term with the definition.

Question 5 options:

A singly reinforced beam 47.2cm×28.3cm, is provided with 5 bar of each diameter 2.2cm. determine:
1) percentage of excess steel used
2) moment of resistance
3)Actual stress develop in steel and concrete
4) maximum allowable central load that can be put if it is carrying a uniformly distributed load of 850kg/m over a simple supported length of 3.2m.

(note : we have exam right now please help please ???)

How the behavior of a SDOF is going to be affected by a non-linear elastoplastic behavior of the spring? Why?

In which stage of the industry life cycle would you place Genetic Engineering. I think Genetic Engineering is the start up stage. Why is it the start up stage?  Can you provide more detail on the start up stage.

Two systems were constructed to disinfect a raw water source. One of the systems was designed as a CSTR, the other as PER (tank divided into 3, 5m long passes using vertical baffles).The flow rate is 90 m^3/day. The influent coliform is count 100. Both tanks have a volume of 30 m^3 (H= 2m, W=3m, L=5m). Chlorine is added as the disinfectant. The disinfection rates follows a first order relationship as follows

dN/dt = kN

Where N is the number of coliforms in the systems, k is the first order disinfection constant (9/day) What is the expected coliform concentration in the effluent from each system?

A company is using an outdoor pond to get rid of some organic material in a 500 gallons/ hour wastewater stream. In the current situation, the pond which has a surface area of 1.00 acre (= 43,560 ft^2) and the average depth of 6 ft, removes of 62% of the organic material, but the company is not satisfied with this rate of removal and plans on digging a second pond to provide additional treatment of the effluent so that a total of 95% of the organics are removed from the wastewater. The company’s data indicates that, being outdoors the existing pond is subject to evaporation at the rate of 25 gallons/hour. For geographical reasons, the additional pond cannot be dug deeper than the existing pond and must therefore have a depth of no more than 6 ft. (a) Estimate the decay coefficient of the organics in the existing pond. (b) Determine the area (in acres) that the planned needs to have to enable the company to achieve its goal of 95% removal of the organics. For this assume that the second pond is place in series from the first (that is, the effluent of the first pond feeds the second pond), that the decay constant will be the same in the second pond as it presently is in the first pond, and that water loss by evaporation is proportional to the surface area of the pond.

1

a) What is the difference between an AADT and an ESA?

b) Why would you consider adopting a longer design life for a pavement?

c) What are three different methodologies for forecasting traffic volumes? What are their strength

1. Conceptually describe how you would evaluate the initial grade of the new segmental culvert so that in its final condition (i.e. after all settlement is complete) it slopes with a 4% grade. The culvert will be installed prior to construction of the embankment (i.e. the embankment will be filled over the culvert).

A 3 m by 3 m square footing is sitting 1.6 m below the ground surface. The anticipated column loads include a moment (M=50 kN.m), a horizontal force (Qh=40kN, acting in the same direction as the moment) at the ground surface and a vertical force (Qv=260kN). Determine the minimum and maximum stress beneath the footing and draw the stress profile diagram to scale.

Wondering if I am doing these calculations correctly I have a lab report due today.

Questions

Sample Calculation:

5. = s / e

(10,600,000 psi)*1102 = 1.168 x 10^10 lb

E = 10600 ksi = 10,600,000 psi

Table 3 and 4 present the particle size and index properties of soils. Use at least two methods to qualitatively identify the swell potential of the samples. Conclude on the effect of sand addition.

Table 4. Percentages of fines passing 75um size sieve.

Table 3. Atterberg limits of natural soil and mixtures with sand.

A car is traveling at 20 mi/h on good, dry
pavement at 5000 ft elevation. The front-wheel-drive
car has a drag coefficient of 0.30, a frontal area of 20 ft2
and a weight of 2500 lb. The wheelbase is 110 inches
and the center of gravity is 20 inches from the ground,
50 inches behind the front axle. The engine is producing
95 ft-lb of torque and is in a gear that gives an overall
gear reduction ratio of 4.5. The radius of the drive
wheels is 14 inches and the mechanical efficiency of the
drivetrain is 90%. What would the acceleration of the
car be if the driver was accelerating quickly to avoid a
collision?

a) 3.65 ft/s2
b) 15.53 ft/s2
c) 15.90 ft/s2
d) 3.48 ft/s2

Q 7. Explain Finite Elements Solution of Bean on Elastic Foundation.