A vertical curve is designed for 90 km/h and has an initial grade of + 2.5% and a final grade of -1.0%. The PVT is at station 3 + 480. It is known that a point on the curve at station 3 + 440 is at elevation 75 m. What is the stationing and elevation of the PVC? What is the stationing and elevation of the high point on the curve?

An equal-tangent crest vertical curve is designed for 100 km/h. The initial grade is +3.4% and the final grade is negative. Draw the curve. What is the elevation difference between the PVC and the high point of the curve?

A vertical curve is designed for 75 km/h and has an initial grade of + 3.5% and a final grade of -2.0%. The PVT is at station 3 + 560. It is known that a point on the curve at station 3 + 520 is at elevation 85 m. What is the stationing and elevation of the PVC? What is the stationing and elevation of the high point on the curve?

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A vertical curve is designed for 75 km/h and has an initial grade of + 3.5% and a final grade of -2.0%. The PVT is at station 3 + 560. It is known that a point on the curve at station 3 + 520 is at elevation 85 m. What is the stationing and elevation of the PVC? What is the stationing and elevation of the high point on the curve?

Think back to all of the ways we have learned to analyze structures by hand in this class. Now recall the SAP2000 assignments and any other software program we may have used (excel, maybe Mathcad or MatLab). Using at least 10 sentences, discuss how technology is making it easier and making it harder to complete structural analysis tasks. In what way does technology present new challenges? What are some of the advantages and disadvantages?

1. a) If you were a consulting engineer and were submitting Turnkey tender on behalf of a Turnkey Contractor, would you consider a conflict of interest between the role of a consulting engineer and contractor? Enlarge on the ethics of this subject. b) It is clear to you that an Engineer engaged in a particular project (implement at the taxpayer’s account) is not maintaining professional standards, i.e. professional competence and integrity are lacking. What would be your reaction? Will you report the above incident to the Board of Engineers, Malaysia or bring this to the attention of the client, or will you maintain silence and watch substandard work being completed? c) “Professional Engineer should be allowed to practice as consultants and as a contractor at the same time”. Do you agree with this statement? If so, give your reason objectively for supporting it; if not also give reasons for appeasing it.

The answer shall be about 1500 words.

Using the AASHTO 1993 Flexible Pavement Design Procedure, design a pavement cross section that will provide 10 years service. The initial PSI is 4.2 and the final PSI is determined to be 2.5. The subgrade has a soil resilient modulus of 18,000 psi. Reliability is 95% with an overall standard deviation of 0.4. For design, the daily truck traffic consists of 400 passes of trucks with two single axles and 350 passes of semitrailer truck with tandem axles. The axle weights are:

Single-Unit truck                    =          8000-lb steering, single axle

                                                =          22,000-lb drive, single axle

Semiunit truck                        =          10,000-lb steering, single axle

                                                =          16,000-lb drive, tandem axle

                                                =          34,000-lbs trailer, tandem axle

M₂ and M₃ are equal to 1.0 for the materials in the pavement structure.

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Explain the difference between fully plastic and elastic design

A 3.0% grade passing at station 19+85.00 at an elevation of 99.10 m meets a -2.0% grade passing at station 20+35.00 at an elevation of 99.60 m. Please note that these two elevations and stations DO NOT correspond to BVC and EVC.

Determine the station and elevation of the point of intersection of the two grades./

If the highest point on the curve must lie at station 20+40.00, find the elevation of this point and the
length of the curve that meets these conditions./

Calculate the station and elevation of the beginning of the vertical curve (BVC), and its end (EVC).

Layout this curve at 100 m stations.

what is compression test and why is it important when testing materials for civil engineers?

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What is the difference between free vibration and forced vibration? Derive the necessary equations and draw necessary pictures.

7–44 Reconsider Prob. 7–43. Using appropriate software, investigate the effects of the source temperature and final pressure on the total entropy change for the process. Let the source temperature vary from 30 to 210°C, and let the final pressure vary from 250 to 500 kPa. Plot the total entropy change for the process as a function of the source temperature for final pressures of 250 kPa, 400 kPa, and 500 kPa, and discuss the results.

Apply the discrete particle settling theory to calculate the terminal settling velocity of a sand particle in the water at 25°C having a particle diameter of 300 µm and a density of 2,450 kg/m3. Show the calculations and logic for at least two of your iterations.

please clear steps