Short answer please..

During the site investigation for a highway project, you observed a wet clayey soil deposit. How can you check scientifically the saturation condition of soil in terms of saturated/unsaturated state?

A soil specimen is subjected to a uniformly distributed fluid pressure only in a triaxial compression test. Draw the Mohr’s circle representation of the state of stress within the soil specimen.

Would you like to recommend cohesive soils as the backfills behind a retaining structure? Justify your answer.

Example of Mix design proportion calculation
• You need to design the mix proportion of a grade 40 for a column with workability of 50
mm slump and w/c not more than 0.55. The maximum size of gravel aggregate is 10 mm
and the fine aggregate is quarry blast sand. The moisture content of the aggregate is as
follow:
• The gravel aggregate is in moist condition with moisture content of =3.5%, dry density
= 1700 kg/m3
• The sand is in moist condition with saturated surface dry density = 2600 kg/m3
. Percent
passing at 600m =35%,water absorption = 0.5%,
• Aggregate relative combined density (saturated surface dry) = 2.60
• Cement used is Sulfate Resistance because part of column is in soil identified to contain
sulfate

21. List at least 10 functions that exterior building cladding performs and list one or two ways in which each of these functions is typically satisfied in a cladding design. Answer:

a. _______________________ ; ______________________________________________________

b. _______________________ ; ______________________________________________________

c. _______________________ ; ______________________________________________________

d. _______________________ ; ______________________________________________________

e. _______________________ ; ______________________________________________________

f. _______________________ ; ______________________________________________________

g. _______________________ ; ______________________________________________________

h. _______________________ ; ______________________________________________________

i. _______________________ ; ______________________________________________________

j. _______________________ ; ______________________________________________________

A a = 0.55 (m) × b = 0.3 (m) concrete box with Manning roughness coefficient of n = 0.016 is to be placed under a roadway. During the T = 100 years design storm, it is expected that water will pond behind the culvert to a height h = 0.2 (m) above the crown of the culvert. If the culvert entrance is to be rounded with the exit loss coefficient of Ke = 0.2 and discharge coefficient of Cd = 0.45. If the slope of the culvert is S% = 0.2 and the length of the culvert is L = 4 (m),

1. estimate the flow rate through the culvert.
2. If the flow rate drops down to 20% of the design storm, estimate the depth of water behind the culvert.

Why is this false?

IDF curves, becoming more accurate when correlated with areal photography (e.g., photos captured via airplane, etc), yield average rainfall depths for a given watershed serving as another way to validate averaging techniques such as the Thiessen methods.

#1

You are overseeing the plans for construction of a new highway. Someone proposes using cheaper, substandard materials to control/treat water flowing off the construction site. The water on the construction site contains measureable concentrations of sediments, oils from vehicles, heavy metals, and components of asphalt. A recreational lake is nearby and downgradient from the construction site. This is a substantial slope (10% grade) across the site.

a) LIST the three pillars of sustainability and EXPLAIN how this issue connects to each pillar.

b) Assuming you are a licensed engineer, what is your ethical obligation to the public AND other licensed engineers working on this job? [Your response should cover ethical obligations to both parties.]

c) LIST and DESCRIBE at least two ways to control fluvial (water) erosion on this site.

Will like right away!!

Can a soil swell during shearing? List two field examples where this can be observed?

what is meant by mollier diagram? Explain.

5. Explain and use diagrams where applicable the following:
   • Transportation network hierarchy
   • Density
   • Captive and Choice riders
   • Types of Right-or-Way categories and their differences
   • Name and explain the three (3) types of stopping regimes for transit operations
   • Advantages and disadvantages of articulated bus versus regular bus.

1. Name the four (4) factors involved in highway crashes.
2. Explain or define Grade-Separated highway.
3. Define and explain two (2) types of At-Grade Intersections, and use diagrams to illustrate your explanations.
4. How many Right-of-Way (R/W) Categories do we have in Urban Public Transportation modes? Explain in detail the operational and physical characteristics of the R/W Categories identified. Give real world examples for each.

1. Name the feedstock materials used in the manufacture of Portland cement. Describe the process of cement production using these materials.   
2. Explain the importance of water in the setting reaction for cement and the reasons for selecting the correct water-cement ratio in concrete. Discuss the problems that might occur when the water-cement ratio is too low or too high.   
3. Write down the chemical reaction between atmospheric carbon dioxide and concrete and state what happens to the pH of concrete as a result of this process. Give the common name for this reaction. Explain the effect of this reaction on both the strength of concrete and on the integrity of steel reinforcement.   
4. State how the mechanical properties of concrete are altered by the addition of steel reinforcement and explain the mechanism of this effect. How would corrosion of the steel or degradation of the concrete affect the mechanical properties?

Define frequency, based on a sketch of a harmonic wave you have drawn, and state its units of measure (namely, Hz)

1) Be able to explain stainless steel sensitization and dezincification in brass as an example of a composition cell.

2) Know and understand the galvanic/electromotive series and the basic elements necessary for electrochemical corrosion. That is, what is necessary and how does a galvanic cell operate.

Calcium, magnesium, iron, manganese, nitrate, nitrite, chloride, and sodium are some
of the most abundant ions present in water samples. Two methods (predominant polyvalent cations
and all polyvalent cations) have been used to measure Total Hardness (TH). Discuss when
a) TH measured using the predominant polyvalent cations = TH measured using all polyvalent cations
b) TH measured using the predominant polyvalent cations > TH measured using all polyvalent cations
c) TH measured using the predominant polyvalent cations < TH measured using all polyvalent cations

A wastewater treatment plant serves 5,000,000 people. Each person on the average produces 0.1m^3 per person per day of wastewater. If the ultimate BOD of the discharge from the plant is 50 mg/L into a 5-meter deep stream that has an average flow rate of 10m^3 per second, a velocity of 1 meter per second, and a BOD value of 5 mg/L. The deoxygenation constant Kd is 0.19/day, and DO at the mix point is 8.5 mg/L. The water temperature is at 20 degrees Celcius and DO5=9.1 mg/L.

What would be the time and distance needed to reach DOmin in the stream?