1. VECTOR PROBLEM: The helicopter travels to accommodate the tourists among the three islands of the Philippines. It moves from the first island going to the second island with a distance of 4.76 km, 37° N of E. It then sails from the second island going to the last island in a direction of 69° W of N. Lastly, the helicopter goes back to the first island pointing in the direction of 28° E of S. Solve for the distance travelled:
(a) from second to third island; and
(b) from the first to third island
In: Civil Engineering
If a batch of parts made from a precipitation hardenable alloy have been overaged, they can be salvaged by
In: Civil Engineering
True
False
QUESTION 2
16.6 The main purpose of an audit of a construction company’s financial statements is to:
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Confirm that the statement was prepared in accordance with GAAP rules |
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Prepare income tax returns |
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Check the arithmetic used in the financial statement |
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Find employee malfeasance |
QUESTION 3
16.5 From the project lifecycle, we can learn all of the following except:
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Early CM involvement helps to optimized time and cost management |
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Material and labor expenditures should be leveled to manage cash flow |
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Project risk declines with time |
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Cost of change increases with time |
QUESTION 4
16.3 Which of the following best describes the challenges in managing demobilization?
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Managing labor productivity for smaller, fussier tasks and managing worker expectations |
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Maintaining the project owner's attention |
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Slow government approvals |
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Subcontractors are unwilling to complete work until finally paid |
QUESTION 5
16.1 When the amount that has been earned (BCWP) is consistently below the amount that was supposed to be earned (BCWS), it can be concluded that the project is behind schedule.
True
False
QUESTION 6
16.7 Cost estimating and the resulting data are used for all purposes except:
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Financial Management of the CM Company |
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Planning the project |
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Monitoring and controlling costs |
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Costing to win the project |
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Lessons learned from the project can improve performance on similar future projects. |
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The closeout documents are the construction manager's property, so the owner must work with the construction manager when future renovations or additions are performed |
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The closeout interview between senior construction management personnel and the project owner increases the likelihood of future construction work. |
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Retention of excellent contract document records can benefit the project owner in future renovations. |
In: Civil Engineering
The Environment Bureau of HKSAR Government has recently proposed legislation for the proper management of waste electrical and electronic equipment (Hong Kong WEEE) in Hong Kong, and has consulted public views. Do you think Hong Kong WEEE should copy from the EU WEEE or China WEEE Directives? Justify your answers in 6 bullet points (or short paragraphs).
In: Civil Engineering
Give a real world example where a structure collapsed or became structurally unsafe, or settled excessively due to insufficient soil strength.
In: Civil Engineering
In: Civil Engineering
Q3: When a mild steel rod was tested under tension, it
was observed that a load of 8 kN causes an
extension of 0.024 cm in the rod. The maximum load carried by the
steel rod was observed to be
20 kN and the load beyond which stress is not proportional to
strain was noted as 10 kN. When the
specimen breaks, the elongation in the rod measured was 5.25 cm and
the diameter at the fracture
observed was 0.455 cm. What will be the length and diameter of the
steel rod if the total
elongation of the steel rod was found to be 25% and the area of
contraction at fracture estimated
was 12%? Based on the test results, determine the values for the
stress corresponding to limit of
proportionality, modulus of elasticity of the material and the
ultimate stress developed due to
tension.
Experiments were conducted on another brass rod having diameter
same as that of the steel rod
and the changes in the dimensions were tabulated. Within elastic
limit, the extension of the brass
rod is found to be 35% more than that of the steel rod for a length
of 18 cm, suggest a suitable
value for the applied load and determine the percentage increase in
the values of stress and the
strain? Given modulus of elasticity of brass is equal to 0.88 times
that of the modulus of elasticity
of steel. Compare the properties of steel rod and brass rod based
on the test results. (8
In: Civil Engineering
What data is needed from each traffic analysis zone to forecast future volumes?
Maximum Service Flow Rate is determined under…
In: Civil Engineering
In: Civil Engineering
) Consider three monitoring wells, each located at the vertex of an equilateral triangle. The distance between any pair of wells is 200 m. The head at each well, referenced to some common datum, is as follows: well 1, 100.1 m; well 2, 100.2 m; well 3, 100.3 m. Sketch the well field and find the value and direction of the hydraulic gradient.
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Well 2. |
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Well 3. |
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Well 1. |
) Consider three monitoring wells, each located at the vertex of an equilateral triangle. The distance between any pair of wells is 200 m. The head at each well, referenced to some common datum, is as follows: well 1, 100.1 m; well 2, 100.2 m; well 3, 100.3 m. Sketch the well field and find the value and direction of the hydraulic gradient.
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Well 2. |
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Well 3. |
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Well 1. |
In: Civil Engineering
Shown below are the results of water quality analyses of a groundwater source. Because all of the constituents were not analyzed, an ion balance may not be achieved. The pH of the water is 7.6.
a. (8 points) Prepare a bar chart of water composition.
b. (6 points) Based on the bar chart, determine the total hardness, carbonate hardness, non-carbonate hardness, and alkalinity (in the unit of mg/L as CaCO3).
c. (6 points) Estimate the concentrations of carbonate (CO32-) in the water. Express your answer in mmol/L. Given that pKa1 and pKa2 of H2CO3 are 6.35 and 10.33, respectively.
d. (6 points) Dolomite (CaMg(CO3)2(s)) is found in the aquifer sediment where the water sample was collected. Based on the water composition, is dolomite dissolving or precipitating? Given that the Ksp of CaMg(CO3)2(s) is 10-17.09.
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Constituent |
Concentration (mg/L as the ion) |
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calcium (Ca2+) |
150.3 |
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magnesium (Mg2+) |
14.6 |
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total iron (Fe3+) |
1.2 |
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sodium (Na+) |
100.0 |
|
bicarbonate (HCO3-) |
450.0 |
|
chloride (Cl-) |
201.4 |
In: Civil Engineering
Explain in detail why is coordination required at all phases of construction for MEP systems? What are the outcomes when a job is not coordinated properly? Why is in important to coordinate at time of bid and what are the downsides to coordinating at the time of bid?
In: Civil Engineering
Sketch water surface profile in two rectangular channels that are joined with the following information. a. Slope is changing from 0.0016 to 0.015 ? = 0.013 ? = 10 ?? ? = 400 ??? ?0−?ℎ????? 1 = 0.0016 ?0−?ℎ????? 2 = 0.015
In: Civil Engineering
Q3
A rigid strip footing with a width of B is constructed above the ground on a clay deposit, overlying bedrock. The depth of clay layer is H and the water level is at the natural ground surface. Before construction of the footing, laboratory tests on a saturated clay sample, taken at a depth of H/2 below the ground surface, provided the following properties:
Compression Index = Cc , Recompression Index = Cr , Consolidation Coefficient = cv
Over Consolidation Ratio = OCR, Water Content = w% and Specific Gravity = Gs
Assume the vertical uniform surcharge stress on the footing including the weight of footing and column = q
(a) Calculate the initial saturated unit weight of clay deposit.
(b) Based on the elastic theory (Boussinesq’s equation), calculate the excess pore water pressures at the depth of H/2 immediately after applying the surcharge load. Assume the vertical stress (q) is applied instantaneously.
(c) Using theory of 1-D consolidation, calculate the total average settlement of this rigid footing due to consolidation of the clay layer, long time after applying the total load.
(d) Determine the average settlement of this rigid footing after n days of applying the total load due to consolidation of clay deposit. Assume the bedrock is permeable (i.e. Drainage path = H/2)
(e) Plot the graph of settlement versus time (in log scale) for this footing
In: Civil Engineering
In: Civil Engineering