Question 5 (5 + 3 + 2 Marks)
a) What is unified classification of soil? Explain the classification and
nomenclature of Gravels, Sands, Silts and Clays.
b) Explain well-graded, poorly graded and gap-graded soil showing the graph
between percentage passing and grain size.
c) The grain size analysis was conducted and following results are obtained from
graph. The d 10 = 0.15, d 30 =0.425 & d 60 =1.5. Determine the grading of the soil.

A rectangular laboratory channel has a bottom width of 6.0 in, a Manning roughness coefficient of n = 0.010, longitudinal slope of 2% (So = 0.02). The discharge is 180 gpm. Assume α = 1. The water depth is 2.5 inches at Point A, and 3.0 inches at Point B. The normal depth is 2.066 in and critical depth is 3.228 in.

(a) Use the direct step method with one step (Δy = 0.5 in) to determine the distance from Point A to Point B. Do this by hand, using a calculator. Show all work.

(b) Which point is upstream, A or B? Explain the reason for this answer.

1) What length of runway is required for a Boeing a B-727-000 aircraft given the following design conditions?

Normal maximum temperature 75°F ˜ 24°C

Airport elevation                                      4000 ft (1219 m)

Take-off weight                                        200,000 lb (99,873 kg)

Maximum landing weight                        175,000 lb

Max. haul distance                                   1500 mile

Effective runway gradient                       0.85 percent

1) A utility airport is being planned to serve a small community. The visual runway is to be 3600 ft. long. Indicate whether or not the following objects will be considered obstructions to air navigation by the FAA. (HINT: 1 nautical mile = 6076 ft.)

a) A 220-ft radio tower that is not in the landing approach, located 3.1 miles from the airport reference point. The ground elevation at the tower is 25ft higher than the established airport elevation.

b) A planned 75-ft-high office building within the landing approach 1/2 mile from the end of the runway.

2) For the utility airport indicated above, what length of runway is required if the airport is located at 6000 ft above sea level and has a mean daily maximum temperature of 75°F? The effective gradient is 1.2 percent. The airport must accommodate small airplanes having more than 10 seats.

Transportation: Which is more significant in reducing free flow speed on a freeway, narrower lanes or a narrower right side shoulder? Does this make sense to you? Why?

Vertical Curves: Given g₁ = -3%, g₂ = 2%, L = 500', VPI Station of 100+00 Calculate the PT Stationing.

Define calibration and verification. Describe the general process of calibrating a model. List three useful hydrologic calibration parameters. Describe the general process of verification.

List at least three of the most popular event, continuous, or urban runoff models for hydrologic simulation. Give a brief description which includes the model type (event, continuous, physical, analytical, etc) and what it normally is used to model.

Question 1-A) in a horizontal terrain, the width is about 100 m., length 300 m. a rectangular "hospital building" is planned to be constructed urgently. Considering the floor and floor of the hospital building which will be constructed of reinforced concrete or steel construction and designed to be single storey, write down all the work required to be done in the ground survey of this area and its surroundings in order and in complete terms of geotechnical.

b) in this geotechnical evaluation, interpret your thoughts about whether 1 basement should be added or not to the "hospital building", which is intended to be built on a single storey, together with the reasons.

3.3 What specific strategies, tactics, or a practice does the firm employ to achieve its sustainability goals? also provide the reference links with the answer,

3.4 What are the strengths and weaknesses of the company as it relates to sustainability?  

also provide the reference links with the answer,

Engineering Ethics Response about the Volkswagen Emissions Scandal

Introduction: Compose an introduction that provides background information on the case, the ethical concepts that apply to your case, one engineering code of ethics, your argument about whether you believe the stakeholders in the case acted morally, and the evidence used to support your argument. This is where you present your argument or thesis statement.

Formulate the argument supporting your thesis: Take a position on this issue and present it as a thesis. Present at least three premises to support your argument plus the material that supports or explains them. Be sure to use material outside research.

Formulate a refuting argument or assessment of objections: Consider any objections or doubts that someone might make regarding your thesis. Convince the reader that the objections are unfounded and not credible.

Conclusion: Provide a summary of your argument, emphasize its importance, explain how engineers can avoid this situation from happening again in the future

To detail the effect of adverse weather on the railway infrastructure, and planning undertake to mitigate the risk to the following
• operational railway
• planned engineering activities

A four-lane urban freeway is rolling on rolling terrain with 12-ft lanes, obstructions 2-ft from the right edge of the traveled pavement, and nine ramps within three miles upstream and three miles downstream of the midpoint of the analysis segment. The traffic stream consists primarily of commuters. A directional weekday peak-hour volume of 2400 vehicles is observed with 800 vehicles arriving in the most congested 15-min period. If the traffic stream has 10% large trucks and buses and recreational vehicles, determine the level of service.