explain the calculation principle of hardy-cross method in pipe networks
In: Civil Engineering
Assuming a linear speed-density relationship. the mean free speed is observed to be 65 mph at near zero density and the corresponding jam density is 160 veh/mi. Assume that the average length of vehicles is 20 feet.
a) Write down the equations for speed-density and flow-density relationships
b) Calculate the speed and density corresponding to a flow of 1000 veh/hr
c) Calculate the average time headway and average space headway when the traffic flow is at maximum value
In: Civil Engineering
The following two claims are made by salesmen about newly invented 2-phase adiabatic compressors.
Salesman A: "It can compress steam with a quality of 0.2 from 50 kPa to saturated liquid at 1000 kPa."
Salesman B: "It can compress steam with a quality of 0.2 from 50 kPa to saturated liquid at 3000 kPa."
a. Show both claims on a T-?̂ (temperature vs. specific entropy) diagram.
b. Which claim or claims are possible?
c. Which claim or claims are impossible?
In: Civil Engineering
Occupancy data from a single loop detector was obtained from a one way street. The loop detector has a length of 6 feet and was observed to have six vehicles cross over it in a period of 30 seconds. The duration and the length of each vehicle are shown in the table below. Use the average vehicle length in your calculations. Estimate the values of q, k and u (flow, density and speed)
| Vehicle | 1 | 2 | 3 | 4 | 5 | 6 |
| Duration (sec) | 0.31 | 0.28 | 0.3 | 0.33 | 0.39 | 0.35 |
| Length (ft) | 17 | 21 | 22 | 18 | 24 | 19 |
In: Civil Engineering
|
Mix No. |
Water-cement ratio |
Cementitious Content |
Fine Aggregate ratio |
28-day Compressive strength |
|
|
1 |
0.38 |
350 |
0.35 |
39.7 |
|
|
2 |
0.4 |
38.8 |
|||
|
3 |
0.45 |
39.1 |
|||
|
4 |
375 |
0.35 |
34.1 |
||
|
5 |
0.4 |
38.2 |
|||
|
6 |
0.45 |
40.6 |
|||
|
7 |
400 |
0.35 |
34.2 |
||
|
8 |
0.4 |
39.3 |
|||
|
9 |
0.45 |
39.8 |
|||
|
10 |
0.43 |
350 |
0.35 |
27.9 |
|
|
11 |
0.4 |
37.4 |
|||
|
12 |
0.45 |
38.5 |
|||
|
13 |
375 |
0.35 |
31.9 |
||
|
14 |
0.4 |
37.1 |
|||
|
15 |
0.45 |
33.9 |
|||
|
16 |
400 |
0.35 |
26.5 |
||
|
17 |
0.4 |
30.7 |
|||
|
18 |
0.45 |
26.5 |
|||
|
19 |
0.48 |
350 |
0.35 |
30 |
|
|
20 |
0.4 |
32.1 |
|||
|
21 |
0.45 |
30.5 |
|||
|
22 |
375 |
0.35 |
20.7 |
||
|
23 |
0.4 |
27.5 |
|||
|
24 |
0.45 |
39.9 |
|||
|
25 |
400 |
0.35 |
25.4 |
||
|
26 |
0.4 |
31 |
|||
|
27 |
0.45 |
25.3 |
|||
|
Shamsad A., Saeid A. Alghamdi (2014), "A Statistical Approch to Optimizing Concrete Mixture Design", Hindawi Publishing Corporation, The Scientific World Journal, Volume 2014. |
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I want ANOVA hand calculation and if possible output of any design analysis software and find the Normal Probability check of original data and residual, Model regression, Validity of models and Hypothesis testing of coefficient significant
NOTE: I need hand calculation
Thank you
In: Civil Engineering
how we can use "mass reduction" and "external prestressing" as a "methods to retrofit" against earthquake effects the existing buildings in Civil Eng?
In: Civil Engineering
what are two experimental considerations when running PXRD (powder X-ray diffraction) using a flat disk sample holder? And why is the scan time and 2theta range important parameters in the experiment?
In: Civil Engineering
As a geotechnical engineer, you have been asked to conduct experiments that are required to be used in strength and static calculations. If the ground class is not determined and the budget is considered to be unlimited, explain what experiments you choose and why.
In: Civil Engineering
Describe the criteria of Rankine and Coulomb migration, discuss the similarities and differences.
In: Civil Engineering
a) A thick steel plate of total area 840 cm2 (both sides) is exposed to air near the ocean. After 1 year it was found to have lost 502 g in weight due to corrosion. What is the rate corrosion, or corrosion penetration rate CPR, for the material in this environment? Density of steel = 7.9 g/cm3 [8 marks]
b) What type of corrosion is this? [2 marks]
c) Provide two strategies (there are more than two of course, but just choose two) for dealing with this type of corrosion [2 marks]
d Briefly summarise the pros and cons of each strategy as they might apply to a children’s playground at a seaside beach front [8 marks].
In: Civil Engineering
what do you expect to learn, based on theory, practice, design sowftware of bridge engineering (300 words)
In: Civil Engineering
In 2010, OSHA allowed the federal alternative work procedures to expire and redefined residential construction. Currently all workers must adhere to the standard. Do you agree with this? Take a position. In addition, what is different about residential construction vs. commercial construction - in your mind and in the regulations?
In: Civil Engineering
|
d. What parties are usually involved in each type of conflict resolution?
In: Civil Engineering
1. Discuss the significance of Reynold number for the
classification of the type of fluid flow. [4]
2. Explain the terms Hydraulic Grade Line and Total Energy Line.
Compare the total energy line and hydraulic grade lines for the
pipe sections if there is sudden enlargement in the pipe section or
sudden contraction in the pipe with the help of sketches. [8]
3. Describe the term most economical section of a channel. Explain
the condition for most economical rectangular section for an open
channel flow. [6]
4. Differentiate between the terms kinematic similarity and dynamic
similarity. Give suitable examples to support your answer.
[8]
5. Discuss the advantages of dimensional and model analysis.
[4]
In: Civil Engineering