An ISA 90X60X8mm of steel of grade Fe410 is connected to a 12mm gusset plate and is used as a tension member design the weld if weld is to be provided on upper and lower edges of connected legs
In: Civil Engineering
An activated sludge system with recycle (CMFR) uses to treat primary effluent after sedimentation.Use the appropriate kinetic coefficients for the influent water characteristics to CMFR. Influent Characteristics: Flow = 1000 m3/day; bsCOD= 192 g/m3; nbVSS= 30 g/m3; inert inorganics= 10 g/m3
Aeration Tank Data: MLVSS = 2500; g/m3; SRT or θc = 6-day
Calculate:
1.- Fraction of Biomass in MLVSS
2.- Observed yield
a) gVSS/ g bs COD
b) gTSS/g bs COD
3.- Oxygen Requirement Kg/day
In: Civil Engineering
Compute the elevation of TP1 after correcting for “curvature and refraction” given:
“BM A” elevation = 595.00’ (NAVD 88)
BS (plus sight) rod reading on “BM A” = 7.00’ at a horizontal distance of 1,900'
FS (minus sight) rod reading on “TP1” = 1.00’ at a horizontal distance of 1,950'
Please put the final answer in feet.
In: Civil Engineering
For a small scale hydraulic power system, the elevation difference between the reservoir water surface and the pond water surface downstream of the reservoir is 20.35. The velocity of the water exhausting into the pond is 7 m/s, and the discharge through the system is 4 m3/s. The head loss due to friction in the penstock (inlet pipe to turbine, under very high pressure) is negligible. Find the power produced by the turbine in kilowatts. Assume specific weight of water is 9810 N/m3 and g = 9.81 m/s2
In: Civil Engineering
Year |
Pi(cm) |
Year |
Pi(cm) |
1999 |
44.2 |
2010 |
39.2 |
2000 |
47.6 |
2011 |
38.3 |
2001 |
38.5 |
2012 |
46.1 |
2003 |
35.8 |
2013 |
33.1 |
2004 |
40.2 |
2014 |
35.0 |
2005 |
41.2 |
2015 |
39.3 |
2006 |
39.8 |
2016 |
42.0 |
2007 |
39.7 |
2017 |
41.7 |
2008 |
40.5 |
2018 |
37.7 |
2009 |
42.5 |
2019 |
36.6 |
Please clarify each step of the solution.
In: Civil Engineering
Year |
Pi(cm) |
Year |
Pi(cm) |
1999 |
44.2 |
2010 |
39.2 |
2000 |
47.6 |
2011 |
38.3 |
2001 |
38.5 |
2012 |
46.1 |
2003 |
35.8 |
2013 |
33.1 |
2004 |
40.2 |
2014 |
35.0 |
2005 |
41.2 |
2015 |
39.3 |
2006 |
39.8 |
2016 |
42.0 |
2007 |
39.7 |
2017 |
41.7 |
2008 |
40.5 |
2019 |
37.7 |
2009 |
42.5 |
2019 |
36.6 |
How many times was the P10 (normal) exceeded in the 20-year annual precipitation record given in Problem 1 ?
Please clarify each step of the solution
In: Civil Engineering
A 1200 mm deep by 750 mm wide post-tensioned simply supported beam is shown below. The beam spans 12.0 m and is subject to a superimposed dead load of 50 kN/m and a live load of 35 kN/m. Both the superimposed dead load and live load are applied after transfer (after stressing has taken place). The tendon is located at the mid-height of the beam at each end, and its centreline sits 50 mm from the base at midspan. The concrete strength at transfer is 22 MPa, and at maturity is 40 MPa. Assume Ec = 32800 MPa, γc = 24 kN/m3 and ignore any prestress losses.
a) If Pi = 2700 kN, assess the adequacy of the beam at transfer. In addition, assuming Pi cannot be changed, briefly describe three methods that could be used to ensure the transfer stresses are within code limits.
In: Civil Engineering
Horizontal Curve Problem- A field measurement of an existing two-lane curved roadway (horizontal curve) indicates that the chord length (C) for the inside radius of the road (roadway edge line) is 312.5 ft and the distance from the middle of the chord to the roadway edge line 25 feet. The road has 28 feet of travel way, 14 feet for each lane. Respond to the next three questions about this horizontal curve.
1. Radius for the horizontal curve to the center of the road most nearly is: A. 515ft B. 494ft. C. 501ft. D. 508ft.
2. The sight distance fir the roadway is most nearly: A. 362.5ft. B.355.8ft. C. 365.0ft. D. 360.5ft.
3. Safe operating speed for this section of the Road most nearly is: A.50MPH. B.35MPH. C.40MPH. D.45MPH
In: Civil Engineering
In: Civil Engineering
In: Civil Engineering
In: Civil Engineering
Sustainable Concept
Air pollution in Asia has worsened since 2000 and is responsible for deaths of thousands of people in Beijing, Jakarta, Seoul and Manila. The pollution is a result of the use of fossil fuels by the industry and transport sectors. The problem got aggravated in Asia due to the use of poor quality fuel, inefficient method of energy production, use of vehicles in poor condition and traffic congestion. This was revealed during a research conducted by World Bank and Stockholm Development Institute. The research states that air pollution in the continent has surpassed the combined emissions in Europe and North America. The deaths caused by fine particulate matter far exceed those caused by sulphur dioxide, nitrogen oxide, ozone and lead. The health cost in major Asian cities now exceed for 15-18 percent of urban income expenditure, claims World Bank officials.
a) A comprehensive campaign to address air pollution need to be launched through school children, what programme (one) would you envisage for this. What is outcome anticipated?
b) There is a sudden decision to remove all vehicles from the road that fails to meet specified norms of emission level within a specified time period. As part of citizen forum you are requested to give views on the enforced regulation. State your views on this.
c) A massive campaign on environmental degradation is to be initiated. Bring out a slogan and the key message that need to be addressed.
d) Suppose you are a Carbon Credit Auditor appointed to assess the greenhouse gas emission reduction strategies. Identify a component of assessment and brief the methodology that could be adopted in connection with this.
In: Civil Engineering
Discuss the effect of reservoir fluid properties on completion design
In: Civil Engineering
Will the time frame of a project affect the completion design? Discuss.
In: Civil Engineering
Discuss the challenges posed by the drilling activities on reservoir completion.
In: Civil Engineering