Question

In a soil test, it took 16.0 min for 1508
cm^{3} of water to flow through a sand sample, the cross
sectional area of which was 50.3 cm^{3}. The void ratio of
the soil sample was 0.68.

Find the following

a. Velocity of water through the soil. = cm/sec

b. Actual (interstitial) velocity. = cm/sec

Answer #1

Q1. A standard constant head permeability test was performed on
a coarse sand soil sample that was 100 mm in diameter and 200 mm in
length. The measured discharge through the sample was 2.16 litres
per minute with an equivalent constant head loss of 845 mm (acting
over the entire sample length). At the end of the test, the total
mass of the sample was recorded 3.142 kg and the moisture content
of the sample was measured at 24 %....

Length of soil sample for constant head permeability test is 30
cm, Area of specimen is 177cm2, constant head difference is 50 cm,
total volume of water collected in 5 min is 350003. Calculate the
hydraulic conductivity of the soil. A) 2.85 x 103cm/sec D) 1.09 x
102cm/sec B) 1.09 x 10" art/sec C) 3.95 x10' cm/sec

A sample of fine sand having a length of 60 mm and a cross
sectional area of 50 cm2 was tested under constant head
conditions. The height of the water head during the test was 40 cm.
A total of 430 mL of water was collected in 10 minutes.
Calculate the discharge velocity (v). Report your answer in
terms of cm/sec

Water flows at a rate of 30 L/min through a horizontal
7.0-cm-diameter pipe under a pressure of 80 Pa. At one point,
calcium deposits reduce the cross-sectional area of the pipe to 20
cm^2. What is the pressure at this point? Consider the water to be
an ideal fluid.

1) A drinking water treatment plant uses a cubic rapid mix,
rectangular flocculation basin, and rectangular sedimentation basin
to treat 10.0 mgd of water. Size the volume for each basin using
the characteristic detention time and flow through velocity
requirements. What is the rapid mix volume for Dt = 30 sec? What is
the floc. basin volume for Dt = 30 min? What is the floc. basin
cross-sectional area for a velocity = 10.0 ft/min? What is the sed.
basin...

Water flows through two sections of a horizontal tube. The
first section has a cross sectional area of 50 cm ^ 2 and the
second section is 10 cm ^ 2. If the velocity of water in the
thickest tube is 1.2 m / s and the pressure is 2.20 x 10 ^ 5 Pa,
find:
a- the speed of the water in the thinnest tube
b- the pressure of the water in the thinnest tube

A Test was Performed according to the following data:
Volume of specimen, V = ? = ?? 2 L (cm2 )
.
418.03
Specific gravity of soil solids, Gs
2.66
Mass of specimen tube with fittings, (g)
238.4
Mass of tube with fittings and specimen, W2 (g) Dry density of
specimen,
9365
Void ratio of specimen,
0.53
(Note: pw = 1 g/cm3
If K=QL/Aht (cm/s) and Gs =2.66 , Volume of Specimen is 418.03
cm3
Determination of coefficient of permeability...

Give a definition of Permeability test
List the Equipments and tools needed to perform the costant
Head Test
A Test was Performed according to the following data
Volume of specimen, V = ?=??2L
(cm2) .
418.03
Specific gravity of soil solids, Gs
2.66
Mass of specimen tube with fittings, (g)
238.4
Mass of tube with fittings and specimen, W2
(g)
Dry density of specimen,
9653
Void ratio of specimen,
0.53
(Note: pw = 1 g/cm3)
■
If K=QL/Aht (cm/s) and...

1) A nozzle is a device for increasing the velocity of a
steadily flowing stream of fluid. At the inlet to a certain nozzle
the enthalpy of the fluid is 3025 kJ/kg and the velocity is 60 m/s.
At the exit from the nozzle the enthalpy is 2790 kJ/kg. The nozzle
is horizontal and there is negligible heat loss from
it.
(i) Find the velocity at the nozzle exit.
(ii) If the inlet area is 0.1 m2 and specific volume...

21) A person carries a 25.0-N rock through the path shown in the
figure, starting at point A and ending at point B. The total time
from A to B is 1.50 min. How much work did gravity do on the rock
between A and B?
A) 625 J
B) 20.0 J
C) 275 J
D) 75 J
E) 0 J
22) A person carries a 2.00-N pebble through the path shown in
the figure, starting at point A and...

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