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A constant-head permeability test was conducted on a sample of fine silica sand. The cross-sectional area of the sample was 60 cm2 and its length was 150 mm. For 80 cm3/min steady-state flow rate, a total head difference of 8 cm was measured across two points separated by 10 cm along the axis of the sample. The dry mass of the sample (i.e. the mass of solids) is 1548 g and the specific gravity of silica sand is 2.65. Calculate:
a. the hydraulic conductivity (k) of silica sand,
b. the unit flux (q) through the sample, and
c. the seepage velocity (v) through the sample.
Constructing the foundation causes changes in the levels of vertical stress at all points in the soil. One such point lies at the centre of the footing plan and is at a depth of 10m. Determine the increment of vertical stress there.
A manometer of water reads a height of 20cm at a temperature of 15 degrees C. If the diameter of the manometer tube is 1mm, what is the static height reading
Assume that bonding atoms touch one another, that the angle between adjacent bonds is 109.5, and that each atom internal to the unit cell is positioned a/4 of the distance away from the two nearest cell faces.
The flowrate Q over a rectangular sharp crested weir depends on the width of the notch b, the head on the weir H, and the acceleration due to gravity g. Find how many dimensionless parameters govern this problem.
The tank has an inner diameter of 1.5 m and a wall thickness of 18 mm. If the pressure in the tank is p=1.20MPa, determine the force in the 16 bolts that are used to attach the cap to the tank. Also, specify the state of stress in the wall of the ..
For each radio produced during months 1 and 2, a $10 variable cost is incurred; for each radio produced during month 3, a $12 variable cost is incurred. The inventory cost is $1.5 for each radio in stock at the end of a month.
An equal tangent vertical curve is to be constructed between grades of -3.0% (initial) and 1.0% (final). The PVI is at station 110+00 and elevation 420 ft. Due to a street crossing the roadway, the elevation of the roadway at station 112+00 must b..
A tensile load of 50 000 lb is applied to a metal bar with a 0.6x0.6 in cross section and a gage length of 2 in. Under this load the bar elastically deforms so that the gae length increases to 2.007 in
Name three types of metamorphic foliations, and draw a small sketch that shows a situation. Where a metamorphic foliation could cause problems in an excavation.
A cylindrical soil, 75mm in diameter and 150 mm long, is radially compressed. The length increases to 153 mm and the radius decreases to 37.2 mm. Calculate: a) The axial and radial strains b) The volumetric strains
If the discharge is 500cfs, what power output may be expected from the turbine. Assume that the turbine efficiency is 90% and that the overall head loss is 1.5V 2/2g, where V is the velocity in the 7 ft penstock.
An intake conduit from a well field used to pump ground water is being designed for a town with a population of 23,000 people. Six years ago the population was 21,500 people. a) assuming deometric growth, calculate the population in 50 years
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