1) For hydration to occur, what is the approximate minimum w/c ratio required? A) 0.5 B) 0.15 C) 0.35 D) 0.25
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1)
For hydration to occur, what is the approximate minimum w/c ratio required?
1 MPa (Mega Pascal) is equivalent to:
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- 1. A soil has a saturation of 0.6 m3/m3, if it has a field capacity (FC) of 0.15 m/m3 and a hygroscopic coefficient of 0.05 m3/m3, what is the gravitational water (as m3/m3)? 2. Calculate the available water depleted if given the following information: present wetness (PW) is 0.25 m3/m3, the field capacity (FC) is 0.3 m3/m3, and the wilting point (WP) is 0.1 m3/m3. Remember, the available water depleted is the percent of plant available water that has already be removed.H2 = 0.3’ h = 1.25’ H1 = 0.2’ d = 1.5” H = 0.5’ D = 4” Ksand = 0.000075 ft/min Ksilt = 0.0038 ft/min Determine: Determine the total flow of water q. Find the equivalent permeability for the soil.A chalk core plug having a pore volume of 17.0307 cm3 is fully saturated with reservoir brine. A synthetic oil (Isopar-L) flood is conducted on this plug. It is found that 12.25 cm3 of reservoir brine was displaced from this plug by the Isopar-L. After reaching this value, no further reservoir brine could be displaced from the core plug. What is the connate water or irreducible water saturation of this core plug?
- An unconfined aquifer is 100 feet thick was evaluated using a field pumping test. The depth to groundwater is 10 feet. At a distance of 1000 feet, the drawdown was 40 feet, and at a distance of 5000 feet it was 20 feet. Find the permeability of the aquifer assuming that a steady-state of 960 gal/minute during the test in ft/sec.The hydraulic conductivity of an aquifer is 0.002 cm/sec, the hydraulic gradient is 0.004, and the porosity is 0.3. The aquifer is 5 meters thick (b). What it is its transmissivity (T) in cm2 / sec. ? Enter your answer to the nearest tenth.4.1.1 Borrow soil is used to fill a 75,000m3 depression. The borrow soil has the following characteristics. Density: 1540kg/m3, water content: 8%, specific gravity of the solids: 2.66. The final in-place dry density should be 1790 kg/m3 and the final water content should be 13%.a) How many m3 of borrow soil are needed to fill the depression?b) Assuming no evaporation loss, what water mass is needed to achieve 13% moisture?
- A silt particle with a density of 2500 kg/m3 and terminal settling velocity (vs) of 1.9 m/hr is entering a rectangular sedimentation basin which has a depth (H) of 4 m. The entire flow rate of 21000 m3/day has to flow through the basin. The temperature of operation is 20C and the density of water at this temperature is 998 kg/m3 and the viscosity is 0.001 kg m-1 s-1. Note: Volume of a rectangular basin = L x W x H.1) What is the size of the particle?2) What will be the volume of the rectangular sedimentation basin needed to remove the particle from the water, assuming 100% removal?An earthen embankment under construction has a total unit weight o f 99.9 lb/ft3 and a moisture content of 10 percent. Compute the quantity of water required to be added per 100 ft3 of earth to raise its moisture content to 14 percent at the same void ratio.Q3/ Calculate bentonite volume that must add to 1000 bbl of water base mud to increase its weight from 10ppg to 16ppg ,If:- 1- the final mud volume must be constant 2- The final mud volume may be Change
- A 15 μm clay mineral particle has terminal settling velocity of 0.202 mm with a density of 2.65 g / cm3 in 20 ˚C water.a. Would these particles be completely removed in a rectangular settling basin that has a 10-m width, a 30-m length and a 4-m depth given a flow rate of 2 MGD (million gallons day).b. What is the smallest diameter clay mineral particle that can be removed in the settling basin for the conditions above?c. What is the smallest diameter clay mineral particle that can be removed in the settling basin for winter conditions when the water temp is 5 ˚CA confined aquifer is 50 m thick and 0.5 km wide. Two observation wells are located 1.4 km apart in the direction of flow. Head in well No. 1 is 50m and in well No. 2 is 42m. Hydraulic conductivity is 0.7 m/day. Effective porosity is 25%. A ship carrying chemicals sank near the observation well no 1 and chemicals somehow reach the groundwater. How long it will take forthe chemicals to reach Well no 2?During the design storm, a detention basin receives a flow rate of 0.2 m3/s. Assuming a sediment specific gravity of 2.65, determine :a) the surface area needed to capture particles 0.10 mm in diameter and larger, and b) the resulting overall trapping efficiency of the basin given the sediment distribution listed below: Size Range (mm) Representative Diameter (mm) Fractional Content 0.001-0.010 0.006 0.25 0.010-0.100 0.055 0.40 0.100-0.500 0.300 0.35