Problem 4. A 20-ft section of horizontal 6-inch-diameter pipe is being investigated in the lab. Ahead loss of 0.435 ft was measured when the flow was 475 gpm of water. If the kinematic viscosityis 1.2 × 10-5 ft2/s, estimate the equivalent sand grain roughness, ks.0.10.09Wholly turbulent flow0.080.070.060.050.050.040.030.02

To estimate the equivalent sand grain roughness (ks), we can use the Darcy-Weisbach equation for…

Answered: Problem 4. A 20-ft section of…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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A cast-iron pipe was installed 50 years ago with a measured friction factor, f, of 0.02and surface roughness height, e, of 0.2mm. The horizontal pipe is 1500m long and has a diameter of35cm. Since installation, significant tuberculation has developed on the inside walls of the pipe. A recentpipe test was conducted. The pressure drop across the entire length of pipe was measured to be 200kPa.The design discharge through the pipe has not changed over the years (Q=0.1m 3 /s, T=20°C). Determinethe current effective friction factor, f, and surface roughness, e, after years of tuberculation buildup.
1. Using the design chart below. Estimate the SN if W18=10x10^6, R=90%, So=0.35, Mr- 10000Psi, ΔPSI=3. Use the chart below. TL Overall standard deviation, S. TL Design serviceability loss, APSI 50 10 5.0 99.9 0.2 99 1.0 0.4 0.6 90 0.5 0.5 0.1 1.5 0.05 2.0 80 70 60 50 2.5 3.0 9 87 6|5 4 3 1 Eхample: 6.5 5.5 4.5 3.5 2.5 1.5 W18 = 5 x 106 Design structural number, SN R = 95% S, = 0.35 MR = 5000 Ib/in? APSI = 1.9 Solution: SN = 5.0 Figure 4.5 Design chart for flexible pavements based on the use of mean values for each input.
3.3 Three grit chambers are currently used to treat grits in a WWTP. Each channel is 2.5 ft wide and has a water depth of 2 ft. What is the velocity when the influent flow rate is 12 ft³/sec? a) 1.75 ft/sec b) 0.74 ft/sec c) 1.05 ft/sec d) 0.80 ft/sec 3.4 You performed settling test and found 600 mL settled after 30 min. If the MLSS in the aeration basin was 3000 mg/L, do you have problem? a) yes b) no c) no enough info. d) need to redo test
Consolidation test results are provided below, (Hint: C, or C = Ae / log(of/ai') ): 1.2 1.1 1- 0.9 Void ratio 0.8 0.7 0.6 0.5 0.4 1 10 100 1000 Vertical stress (kPa) (log scale) In some of the results an interval is provided. It ccan be possible to get a result between the given values Use the plot and find pre-consolidation pressure (past maximum vertical effective stress) pe' according to Casagrande's method. pe'= .kPa Seç. Find C, Seç. Find C.: Seç. If the tested soil sample is taken at a depth of 5m (ysat=18kN/m) where the groundwater table is located at the surface what is the Over Consolidation Ratio(OCR) (OCR= pclo vo) Seç. Initial height of the specimen is 22mm. What is the final height of the specimen when effective vertical stress is 650kPa? Hint: Use void ratio. Seç. (Result is in mm) What is the consolidation settlement of 2m thick clay layer if initial effective stress is 20kPa and final effective stress is 400kPa. Hint: Poc= Seç. [Ho/(1+einit)]x[C,log(p'/o'init) +…
Q1 Data obtained from a laboratory consolidation test are tabulated as follows: Test points I 2 3 4 5 o' (kPa) Total AH (mm) 20 50 100 0.23 0.87 L.90 3.62 5.55 7.25 200 400 800 G,=2.70, Ho= (initial thickness at zero pressure) = 22.5 mm, w = (moisture content at the beginning of the test) = 0.78. Plot the e-logo' curve and calculate Ce Ae I+eo Ho log a - logo, log(o /06) ΔΗ Hint: and
I need the answer quickly
Using the design chart below. Estimate the SN if W18=10x10^6, R=90%, So=0.35, Mr- 10000Psi, APSI=3. Use the chart below. TL Overall standard deviation, S. Design serviceability loss, APSI 50 10 5.0 99.9 0.2 99 1.0 0.4 0.5 0.6 E 90 0.5 0.1 1.5 0.05 2.0 2.5 80 3.0 9 87 6 5 4 2 1 Example: 6.5 5.5 4.5 3.5 2.5 1.5 W18 = 5 x 106 R = 95% Design structural number, SN S, = 0.35 MR = 5000 Ib/in? APSI = 1.9 Solution: SN = 5.0 -1.0
Will a grit particle with a radius of 0.10 mm and a specific gravity of 2.65 be collected in a horizontal grit chamber that is 13.5 m in length if the average grit-chamber flow is 0.15 m³/s, the width of the chamber is 0.56 m, and the horizontal velocity is 0.25 m/s? Hint: Use the data below V's = g S-1] 18 DE 12UP , v=0.959 x 106 m²/s
Styles Editin A production casing was planned to run in the production hole of a well with casing shoe at 15,000 ft. When casing was run empty to the mid depth, collapse safety factor was calculated to be 1.9. When the casing was at the bottom and full of a certain mud, safety factor of the collapse was calculated to be 2.75. If the mud weight of the fluid in the annulus was 14.0 ppg, determine the casing collapse rating and mud weight of the fluid inside the casing.
for the following conditions, determine the groundwater infiltration. new two lane highway, lane width 12ft; shoulder width 10ft; length of crack 20ft; rate of infiltration 0.5ft^3/day/ft^2; spacing of crack 25ft kp=15*10^-5 ft/day
Correct answer.

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