The back fill material for a vibroflotation project has the following grain sizes. D10 0.11mm D20 0.20mm D50 1.3mm D25 D75 0.60 1.60 35. Determine the suitability number. a. 19.3 b. 18.0 C. 17.8 d. 20.4 36. Calculate the sorting coefficient. a. 1.581 b. 2.798 c. 1.633 d. 3.546
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- For a vibroflotation work, the backfill to be used has the following characteristics:D50 = 2 mmD20 = 0.7 mmD10 = 0.65 mmDetermine the suitability number of the backfill. How would you rate the material?For sieves with openings smaller than 4.75mm (No. 4), the quantity retained on any sieve at the completion of the sieving operation shall not exceed ____ (kg/m^2) of sieving surface ea Choices: 10 , 3.23 , 7 , 5.5 ?The result of the liquid limit tests where N is the no of blows and w is the water content in % are given as follows: Trial 1 N=11 w=53.9; Trial 2 N=15 w=50.6; Trial 3 N=23 w=48.1; Trial 4 N= 30 w= 46; Trial 5 N= 46 w=43.3; Trial 6 N= 53 w=41. The PL=25 and the in situ moisture content is 45%. Determine the liquid limit. O a. 41 O b. 47 O c. 43 O d. 50
- 8. The result of the liquid limit tests where N is the no of blows and w is the water content in % are given as follows: Trial 1 N=11 w=53.9; Trial 2 N=15 w=50.6; Trial 3 N=23 w=48.1; Trial 4 N= 30 w= 46; Trial 5 N= 46 w=43.3; Trial 6 N= 53 w=41. The PL= 25 and the in situ moisture content is 45%. Determine the liquid limit. a.43 b.50 c. 47 d.41A falling-head permeability test was performedin a permeameter with an inside diam. of 6 cm.The inside diameter of the standpipe is 3 mm.The sample had a length of 12 cm. During aperiod of 8 min. the head of the sample was120 cm and decreased by 50 cm. Computethe coefficient of permeability of the samplein cm/sec.Sample 2: Mass with empty mold M1 Mass of soil and mold M2 Hydraulic Head h Time interval t Volume V 145 g 250 g 950 mm 0.34 min 0.0046 L 145 g 260 g 900 mm 0.33 min 0.0049 L 145 g 228 g 922 mm 0.30 min 0.0051 L 145 g 281 g 915 mm 0.29 min 0.0044 L 145 g 219 g 908 mm 0.39 min 0.0042 L The diameter of the mold = 2.5 cm, Length of the sample = 0.3 m can u pls Find the permeability coefficient Mass of the soil Bulk Density Dry Density thank you Void Ratio
- a) With the aid of relevant equations explain what is meant by "settling ratio" b) Explain the difference between free settling and hindered settling c) Why is sizing helpful for gravity concentrator feed to have a narrow particle size distribution? d) The shaking table is frequently used for final concentration of gold. Describe this unit showing how operating variables can be adjusted to optimise its performanceGave wrong values earlier. These are the correct values A settling tank having a depth of 3.5 m and surface area of 1000 m2 is used to remove particles of size 0.01 mm and specific gravity of 2.6. Calculate the removal percentage of the tank for the discharge of 7000 m3/d. Take viscosity of water as 1.1x10-3 kg/m.s.Water in a hydraulic press is under a pressure of 92.580 MPaabs. at 15°C. If the initial pressure is 150 kPa abs., what will bethe decrease in specific volume if its bulk modulus is 2.13GPa?
- The result of the liquid limit tests where N is the no of blows and w is the water content in % are given as follows: Trial 1 N=11 w=53.9; Trial 2 N=15 w=50.6; Trial 3 N=23 w=48.1; Trial 4 N= 30 w= 46; Trial 5 N= 46 w=43.3; Trial 6 N= 53 w=41. The PL= 25 and the in situ moisture content is 45%. Determine the liquid limit. a.41 b.43 c.50 d.47Please explain part 1 (ii) of the question given. 1) i) A 6 inch diameter well that fully penetrates a 40ft thick open aquifer is pumped at a rate of 100 gpm. The drawdown in the well is 22ft when a steady water level is established. The drawdown in a well 152ft distant is 12ft. Estimate the coefficient of permeabiliity of the soil deposit. Answer of permeability is K= 9.88 x10-4 ft/sec. ii) Discuss the validity of the answer obtained in 1( i ) and suggest how would you improve the test data obtained to produce a better value of k. Why?The backfill material for a vibroflotation project has the following grain sizes: D10 = 0.11 mm, D20 = 0.19 mm, D50 = 1.3 mm. Determine the suitability number.