CIVIL ENGINEERING LICENSURE EXAMINATIONS
NOVEMBER 2015
Problem 1:
A vertical tube 3m Long with one and closed is inserted vertically
The term applied to fine fractions of the soil having a plasticity
with the open end down, into a tank of water until the open end
index of 11 or more.
is submerged to a depth of 1.0 m. Assume absolute atmospheric
A. B.
Silty Clayey
C. Peat D. Sandy
pressure is 101.5 kPa. Neglecting vapor pressure, how far will the water level in the tube be below the level in the tank? A. B.
Problem 2:
0.787 m 0.526 m
C. 0.348 m D. 0.896 m
The characteristic of the soil when it has a liquidity index less than zero. A. B.
Liquid Plastic
Problem 10: C. Brittle Soil D. Dense
The pressure on a closed tank reads 58.86 kPa. What is the equivalent height in terms of Mercury having a sp.gr of 13.6? A. B.
Problem 3:
0.78 m 0.526 m
C. 0.348 m D. 0.896 m
What is the difference of soil when it has a liquidity index of less than one? A. B.
Brittle solid Liquid
Problem 11: C. Dense D. Plastic
What is the characteristic of soil when it has a liquidity index of greater than one? Dense Plastic
is the trace, supported by a structural frame hinged at C. The length of the gate is 10m. Compute the location of the resultant
Problem 4:
A. B.
The crest gate shown consists of a cylindrical surface of which AB
C. Brittle solid D. Liquid
force horizontally from C. SEE H-11 A. B.
5.22 m 8.61 m
C. 6.25 m D. 9.30 m
Problem 12: A ship of 7064 sq. m horizontal cross-sectional area at the water
Problem 5:
line has a draft of 12.35m in the sea water when loaded to a
The following values were tabulated from a graph using USCS method of soil classification. D10 = 0.425. D25 = 0.90, D60 = 1.y7, D30 = 0.96, D75 = 2.6. What is the value of the sorting coefficient? A. B.
1.2 1.7
C. 0.42 D. 0.8
A trapezoidal masonry dam with a vertical upstream face is 6m high, 0.6m at the top and 3m wide of the bottom. Wt. of concrete is 23.5 KN/m3. Compute the factor of safety against sliding if the coefficient of friction on the base is equal to 0.80. Consider the hydrostatic uplift. 1.13 2.05
C. 2.80 D. 3.53
Problem 7: from a small diam. as shown. The center of the door is 4.5m below the dam’s water level. Assuming the unit of water is 9.79 KN/m3. Compute the location of the center of pressure from the centroid of the door. SEE H-7 5.6 mm 9.2 mm
1.03. Determine the ships displacement in cu. m for fresh water. A. B.
60.633 cu. m 86.124 cu. m
C. 8.7 mm D. 7.5 mm
A wooden stick 3.2 cm sq and 3.6 m long is to be used for a velocity float which is to stand vertically in the water. Wood weighs 500 kg/m3 and for lead 11.380 kg/m3. How many square centimeters of sheet lead 0.08 cm thick must be tucked on the sides of this stick so that only 10cm will project above the water surface. A. B.
2153 sq. cm 2214 sq. cm
A triangle having a base of 1.20 m and altitude of 1.8m wholly immersed in water. Its base of being in the surface and its plane vertical. If the triangle will be divided by a horizontal line through its center of pressure, find the ratio between the pressures on the
A rectangular scow 9m wide 15m long and 3.6m high has a draft in seawater of 2.4m its center of gravity is 2.7m above the bottom of the scow. Determine the initial metacentric height. A. B.
4.07 m 2.81 m
C. 4.25 m D. 3.94 m
Problem 15: water. How much water is spilled out when the tank is accelerated horizontally at 2.45m/s2 in a direction with its longest side? A. B.
2 cu. m 3 cu. m
two areas of the triangle. 1 2
C. 1850 sq. cm D. 2097 sq. cm
An open horizontal tank 2m high 2m wide and 4 long is full of
Problem 8:
A. B.
C. 73.209 cu. m D. 79.458 cu. m
Problem 14:
A circular door having a diam. of 2.5m closes a horizontal duct
A. B.
Is observed that the ship draws 12.6m sp. gr of sea water =
Problem 13:
Problem 6:
A. B.
capacity. In the fresh water at the entrance of Panama Canal, it
C. 3 D. 2.7
Problem 9: Problem 16:
C. 6 cu. m D. 4 cu. m
CIVIL ENGINEERING LICENSURE EXAMINATIONS
NOVEMBER 2015
An unbalanced vertical force of 270N upward accelerates a
Oil flows through a pipe having a diam. of 0.30m at a velocity of
volume of 0.044 m3 of water. If the water is 0.9m deep in a
2m/s. If the Reynold’s number is equal to 1400, compute the
cylindrical tank, what is the pressure at the bottom of the tank in
viscosity of oil in stokes.
N/m ? 3
A. B.
12457 N/m 14355 N/m2 2
C. 10247 N/m D. 16452 N/m2 2
A. B.
3.25 stokes 4.29 stokes
C. 2.54 stokes D. 5.18 stokes
Problem 24: Problem 17:
Oil (sp. gr = 0.86) flows through a 30m in. diam. pipeline at
A small pipe 60 cm long is filled with water and capped at its
8000gpm. Compute the mass flux.
ends. If placed in a horizontal position. How fast must it be rotated about a vertical axis 30cm from an end, to produce a
A. B.
19.6 slugs/s 25.3 slugs/s
C. 29.7 slugs/s D. 33.1 slugs/s
maximum pressure of 70 kg/cm3? A. B.
1850 rpm 1646 rpm
C. 1324 rpm D. 1509 rpm
Problem 25: Carbon tetrachloride having a sp. gr of 0.92 flows through a 200mm diameter pipe at a velocity of 2m/s. Compute the mass
Problem 18:
flow rate in kg/s.
Water is being pump from reservoir A to reservoir B as shown. The total length of pipe is 1090m and a diameter of 600mm. the rate of flow in the system is 0.65 m 3/s. Compute the head added by the pump. SEE H-18 A. B.
19.47 17.07
C. 21.61 D. 20.53
A. B.
57.81 kg/s 51.83 kg/s
C. 55.77 kg/s D. 54.10 kg/s
Problems 26: SAEO oil ρ = 869 kg/m3 flows through a cast iron pipe at a velocity of 1.0m/s. The pipe is 45m long and has a diam. of 150mm. Absolute viscosity μ = 0.814 Pa*s Compute the
Problem 19:
Reynolds number.
The nozzle which furnished the water to a certain hydraulic turbine 275 mm in diam. and has coefficients of velocity and
A. B.
1678 1822
C. 1601 D. 1753
discharged of 0.975 and 0.96 respectively. The nozzle supplied from a 60cm pipe in which the water approached the nozzle with a total head of 330m. Compute the energy per second delivered 13,865 kN.m/sec 14,612 kN.m/sec
The water system in a suburban area consist of an old 20cm. pipe line 750m. long which conveys
by the jet to the turbine. A. B.
Probem 27:
C. 15,694 kN.m/sec D. 12,990 kN.m/sec
water from a pump to a
reservoir whose water surface is 105m higher than the pump. Water is pumped at the rate of 0.70 liter/sec. Neglecting minor losses. Determine the head added by the pump using the 20cm.
Problem 20:
pipeline. Assume f = 0.033
If 140 liters/sec flows through the system shown. Compute the head loss between 2 and 3. SEE H-20 A. B.
9.14 m 20.65 m
C. 16.42 m D. 11.80 m
A. B.
145.18 m 127.36 m
C. 152.09 m D. 136.58 m
Problem 28: A square concrete conduit having a side of 0.788 m carries water
Problem 21:
at a rate of 4 m3/s. Using Hazen-Williams Formula with C=120.
A pipeline having a diameter of 250mm has a rate of flow of 0.30
Compute the head loss if the length of conduit is 45m.
m3/sec from point A to B, with B lower than A. A gate valve is connected at a point C near point B. The elevation of B = 100.
A. B.
2.7 m 1.8 m
C. 5.5 m D. 3.2 m
Compute the length of pipe A to B if f = 0.020. SEE H-21 A. B.
155.02 m 165.51 m
C. 159.37 m D. 162.19 m
Problem 29: A horizontal 600mm Ø pipeline carries oil of sp. gr of 0.825 flowing at a rate of 0.904 m3/sec. Each of the four pumps
Problem 22:
required along the line is the same that is the pressure on the
Installed is a Venturi meter on a pipe 250 mm in diameter in
suction side and on the discharged side will be – 60 kPa and 400
which the maximum flow is 125 liters/sec where the pressure
kPa respectively. If the lost head at the discharged stated is 2m
head is 6m of water. To ensure that the pressure head at the
for each 100m length of pipe. How far apart may the pumps be
throat does not become negative. If the weight of water passing
placed?
through the meter in 2 min was 13800 kg. Compute the meter coefficient. A. B.
124 mm 120 mm
Problem 23:
A. B.
2841.87 m 2595.44 m
C. 139 mm D. 133 mm
Problem 30:
C. 2724.62 m D. 2682.31 m
CIVIL ENGINEERING LICENSURE EXAMINATIONS
NOVEMBER 2015
Three pipes A, B and C are connected in parallel. If the combined
of 15kPa on top of the water surface. If C = 0.86 and Cv = 0.92.
discharged of the 3 pipes is equal to 0.61 m3/s and asuuming
compute the head loss.
they have equal values of friction factor “f”. compute the following using the tabulated data shown. SEE H-30 Pipeline
Length
Diameter
A
600m
150m
B
480m
200m
C
750m
100m
153 liters/sec 147 liters/sec
0.617m 0.888m
C. 0.702m D. 0.945m
Problems 36: An orifice at the side of the tank is located 1 meter above the bottom of the tank, which is resting on the ground. The jet of water strikes a distance of 2.75 m horizontally away from the
Compute the rate of flow of pipeline A in lit/sec. A. B.
A. B.
C. 162 liters/sec D. 170 liters/sec
orifice with Cv = 0.98. The height of the tank is 4m and it is filled with water 2m depth and on top of it is another liquid having a depth of 1 meter. Determine the specific gravity of the liquid. SEE H-36
Problem 31: The figure shows a looping pipe system. Pressure hands at points
A. B.
0.98 0.69
C. 0.72 D. 0.44
A and E are 70m and 46 m respectively. Assume C=120 for all pipes. Compute the flow rate of water through B. SEE H-31 A. B.
0.352 m3/s 0.103 m3/s
C. 0.504 m3/s D. 0.223 m3/s
Problem 37: A circular vessel 2m in diameter and 3 m high is one-third filled with liquid A having a sp. gr of 1.0 one-third filled with liquid B having sp. gr of 2 and the remaining one-third filled with liquid C
Problems 32:
hading a sp. gr of 3. At the bottom of the vessel is a 900 sq. m
Three reservoirs A, B and C are connected by pipelines 1, 2 and 3
standard circular orifice C = 0.60. Find the time to empty the
respectively, which merges at a junction X. The elevation of
vessel through the orifice.
reservoir A is 300m and that of B is 285m. The rate of flow from reservoir A is 1.4m3/s Pipes
Diam
Length
Friction factor “f”
1
800mm
1500m
0.0157
2
600mm
450m
0.0162
3
450mm
1200m
0.0177
Compute the rate of flow in reservoir C A. B.
0.457 m3/s 0.665 m3/s
C. 0.741 m3/s D. 0.975 m3/s
A. B.
77.98 sec 24.62 sec
C. 65.54 sec D. 50.75 sec
Problem 38: Determine the discharge of the weir haing a head of 0.30m in liters/sec. If a trapezoidal weir with aides inclined 14.04° with the vertical and a length of crest of 2m. A. B.
611 liters/sec 358 liters/sec
C. 495 liters/sec D. 530 liters/sec
Problem 39: A channel is carrying 300 liters/sec of water. Assuming 0.002 m
Problem 33: Water from a reservoir flowing through a non-rigid 600mm diam. pipe with a velocity of 2.5 m/s is completely stopped by a closure of a valve situated 1050m from the reservoir. Assume that the pressure increases at a uniform rate and that there is no damping of the pressure wave. The pipe has a thickness of 18mm Bulk modulus of steel water is 2060 MPa and modulus of eslasticity of steel is 200000 MPa. Compute the velocity of sound in water. A. B.
1063.12 m/s 1238.35 m/s
C. 1195.41 m/s D. 1340.27 m/s
Problem 34: A sharp egde orifice 75mm in diameter lies in a horizontal plane, the jet being directed upward. If the jet rises to a height of 8m and the coefficient of velocity is 0.98. Determine the head under which the orifice is discharging neglecting air resistance. A. B.
6.46 m 11.97 m
C. 8.33 m D. 12.85 m
error is made in measuring the head. Determine the percentage error in the discharge if a 90° triangular weir is used. A. B.
0.776% 0.933%
C. 0.805% D. 0.642%
Problem 40: The flow of water from a reservoir passes through a 12 m long spillway. It takes 30minutes to lower the water surface from the elevation 82 cm to elevation 81 cm with crest elevation at 80 m. Compute the area of the reservoir. A. B.
67847 m2 71630 m2
C. 60251 m2 D. 75396 m2
Problem 41: A rectangular channel 5.4m wide and 1.2m deep has a slope of 1 in 1000 and is lined with good rublble masonry (n=0,017). It is desired to increase the channel slope with a favorable section. The dimension of the section maybe changed but the channel must contain the same amount of lining as the old. Using Kutters
Problem 35: Two closed compartments A and B are connected by an orifice having a diam. of 140mm at its sides. At compartment A, it contains water at a depth of 3m above the orifice and a pressure on top of it equal to 50 kPa. On the other compartment, it contains water at a depth of 2m above the orifice and a pressure
Formula. Compute the value of Kutters Coefficient C of the old channel. A. B.
57.19 30.28
Problem 42:
C. 65.11 D. 47.53
CIVIL ENGINEERING LICENSURE EXAMINATIONS
NOVEMBER 2015
A rectangular channel cut in firm clay is 10m. wide and the depth
moving at 4 m/s in the same direction as that of the jet. Find the
of water is 1.8 m. The channel slope is 0.001. Allowable velocity
work done on the plate per second.
to prevent erosion is expressed as V = 0.35√gd Compute the maximum discharge of the channel to avoid erosion. A. B.
19.45 m3/s 21.19 m3/s
C. 15.84 m3/s D. 26.46 m3/s
A. B.
7068 N.m/sec 6524 N.m/sec
C. 8265 N.m/sec D. 9915 N.m/sec
Problem 50: A vertical jet of water supports a load of 200 N at a constant vertical height of 12 m from the tip of the nozzle. The diameter of
Problem 43:
the jet is 25 mm Ø. Find the velocity of the jet at the nozzle tip.
A rectangular channel carries a flow of 20 m3/s at a velocity of 5m/s. For a best hydraulic section, compute the slope of the
A. B.
27.41 m/s 21.16 m/s
C. 23.28 m/s D. 25.47 m/s
channel if n = 0.013. A. B.
0.0054 0.0075
C. 0.0067 D. 0.0043
Problem 51-53: A saturated clay layer has a thickness of 6m with water content of 24.2% with sp. gr of 2.70
Problem 44: A trapezoidal canal with a bottom width of 1.5 m and with side slopes of 2 horizontal to 1 vertical ha a velocity of 1.2m/s. If the depth of flow is 2.4m. and has a slope of channel bed of 0.000212. compute the roughness coefficient of the canal. A. B.
0.053 0.014
C. 0.086 D. 0.024
51. Compute the total density of the clay layer A. B.
15.36 kN/m3 19.92 kN/m3
C. 23.45 kN/m3 D. 10.47 kN/m3
52. Compute the total stress at the bottom A. B.
112.12 kPa 130.57 kPa
C. 126.38 kPa D. 119.52 kPa
53. Compute the effective stress at the bottom Problem 45: A trapezoidal flume of most efficient proportion has a base of 1.5m. Its full discharge is 3 m3/s. if the same materials is used for a most efficient rectangular section compute the decrease in the discharge. A. B.
0.19 m3/s 1.08 m3/s
C. 0.45 m3/s D. 0.64 m3/s
The cross section of a right triangular channel is shown with a coefficient of roughness n = 0.012. the rate of flow is 4 m3/s. Calculate the critical depth. SEE H-46 3.459 m 2.506 m
60.66 kPa 52.35 kPa
C. 46.76 kPa D. 65.36 kPa
Problem 54-56: The field unit weight of the soil sample is 1960 kg/m3 and the unit weight if the soil particle is 2700 kg/m3 if the emax = 0.69 and the emin = 0.44 54. Compute the dry unit weight in kN/m3 if the water content is
Problem 46:
A. B.
A. B.
C. 0.329 m D. 1.267 m
11% A. B.
15.58 kN/m3 16.28 kN/m3
C. 18.48 kN/m3 D. 17.32 kN/m3
55. Compute the void ratio of the soil sample A. B.
0.65 0.76
C. 0.53 D. 0.92
56. Compute the relative density of the soil sample
Problem 47: A channel has an optimum section of a trapezoidal canal. It is to
A. B.
70% 64%
C. 53% D. 45%
carry a discharge of 17 m3/s and a maximum velocity to prevent scouring of 0.80 m/s. coefficient of roughness is 0.018. Compute
Problem 56-58:
the section factor of the channel section.
A sample of soft saturated clay has a volume of 100 cu. cm and
A. B.
1.23m 2.78 m
C. 4.61 m D. 3.76 m
56. Compute the water content of clay
Problem 48: Water upon leaving the spillway of a dam passes over a level concrete apron 60m. wide. Conditions are such that a hydraulic jump will form on the apron. When the discharge is 4.65 m3/s per meter width of channel the velocity where the water leaves the spillway is 13.5 m/s and the depth after the jump is 3m. Compute the depth of water where the jump occurs. A. B.
0.4286 m 0.7166 m
weighs 175 g If the oven dry weight is 120 g.
C. 0.5111 m D. 0.6085 m
A. B.
45.8% 61.2%
C. 49.5% D. 52.7%
57. Compute the void ratio of the clay A. B.
1.22 2.87
C. 3.32 D. 4.00
58. Compute the sp. gr of the clay A. B.
3.32 2.66
C. 1.39 D. 0.59
Problem 60-62: For a given sandy soil with max. and min. void ratios of 0.75 and 0.46 respectively has a sp. gr of 2.68. if the density index is 78% Problem 49:
and a moisture content of 9%.
A jet of water 250 mm in diameter impinges normally on a flat steel plate. The discharge is 0.491 m3/s. If the flat plate is
60. What would be the in situ void ratio?
CIVIL ENGINEERING LICENSURE EXAMINATIONS A. B.
0.6258 0.5238
C. 0.7452 D. 0.4545
NOVEMBER 2015 A. B.
376.48 mm 320.74 mm
C. 381.33 mm D. 357.12 mm
61. Determine the degree of saturation of the soil. A. B.
42.15% 53.36%
C. 46.05% D. 38.75%
Problem 72-74: A layered soil is shown with the corresponding values K1, K2, and
62. What will be the moist unit wt. of the compaction in the field? A. B.
16.28 kN/m3 18.81 kN/m3
C. 20.48 kN/m3 D. 25.36 kN/m3
72. Compute the equivalent horizontal coefficient of permeability
Problem 63-65: A soil having a sp.gr of 2.74 has a moist unit wt of 20.6 kN/m3 and a moisture content of 16.6%
21.20 kN/m3 18.29 kN/m3 14.91 kN/m3 13.72 kN/m3
C. 16.27 kN/m3 D. 12.83 kN/m3
A. B.
Final volume = 16 cm3 Mass of wet soil = 45 kg
C. 41.55% D. 45.50%
22.7% 19.3%
C. 26.9% D. 15.1%
0.627 0.321
C. 1.340 D. 0.952
78. Compute the maximum dry unit weight A. B.
66. Determine the shrinkage limit of soil C. 10.23% D. 19.78%
15.51 kN/m3 16.65 kN/m3
C. 17.65 kN/m3 D. 18.40 kN/m3
79. Compute the optimum moisture content A. B.
67. Determine the shrinkage ratio C. 3.2365 D. 0.7824
11.8% 16.1%
C. 13.2% D. 17.5%
80. Compute the degree of saturation at the optimum moisture content
68. Determine the sp. gr of soil 2.12 2.82
48.14% 50.76%
Problem 78-80 (problem #153)
Mass of dry soil = 31 kg
A. B.
C. 26.78 D. 28.58
77. Compute the liquidity index
Initial volume = 25 cm3
1.9375 2.4571
24.81 22.36
76. Compute the plastic limit
A saturated soil has the following characteristics
A. B.
C. 3.25 x 10-4 cm/s D. 4.39 x 10-4 cm/s
75. Compute the Liquid Limit
A. B.
12.45% 16.13%
6.21 x 10-4 cm/sec 5.78 x 10-4 cm/sec
Problem 75-77 (problem #99) A. B.
C. 16.33 kN/m3 D. 18.87 kN/m3
Problem 66-68:
A. B.
73. Compute the equivalent vertical coefficient of permeability
A. B.
soil for 100% degree of saturation 14.70 kN/m3 20.14 kN/m3
C. 108.9 x 10-4 cm/s D. 121.2 x 10-4 cm/s
permeability to the equivalent vertical coefficient of permeability
65. Compute the weight of water in kN to be added per cu. m of A. B.
96.54 x 10-4 cm/sec 113.6 x 10-4 cm/sec
74. Compute the ratio of the equivalent horizontal coefficient of C. 19.99 kN/m3 D. 22.02 kN/m3
64. Compute the degree of saturation A. B.
A. B. A. B.
63. Compute the void ratio A. B.
K3. SEE H-72
A. B.
C. 2.36 D. 2.05
74% 81%
C. 86% D. 69%
Problem 81-83 (problem #122)
Problem 69-71:
81. Classify soil A using AASHTO Method
For a variable head permeability test, the following are given:
A. B.
Length of soil specimen…………….. 200 mm Area of soil specimen………………… 1000 mm
A-1-a A-1-b
C. A-2-5 D. A-2-4
82. Classify soil B using AASHTO Method
Area of stand pipe……………………... 40 mm2
A. B.
Head difference at time, (t = 0) is 500 mm Head difference at time, (t = 3min) is 300 mm
A-2-7 (1) A-2-6 (1)
C. A-2-5 (2) D. A-2-4 (2)
83. Classify soil C using AASHTO Method A. B.
69. Compute the hydraulic conductivity of the soil in cm/sec A.
3.12 x 10-3 cm/sec
C.
5.55
x
10-3
B.
cm/sec 2.27 x 10-3 cm/sec
D.
8.21
x
10-3
A-2-5 (8) A-2-6 (1)
C. A-7-5 (12) D. A-7-6 (13)
cm/sec Problem 84-86 (problem #98) 70. Compute the seepage velocity if the porosity of soil (n = 0.25) A.
9.08 x 10 cm/sec
C.
5.99
x
10
B.
cm/sec 4.21 x 10-3 cm/sec
D.
7.21
x
10
-3
-3
84. Determine the liquid limit of the soil A. B.
46% 63%
C. 52% D. 55%
85. Determine the plasticity index of the soil
cm/sec 71. What was the head difference at the time (t = 100 sec)
-3
A. B.
31% 22%
C. 29% D. 46%
86. If the natural water content of the soil is 38% determine the liquidity index
CIVIL ENGINEERING LICENSURE EXAMINATIONS A. B.
0.43 0.55
NOVEMBER 2015
C. 0.60 D. 0.38 92. Compute the total vertical pressure at a point 5 m below the
Problem 87-89: A sand layer of the cross-sectional area shown in the figure has been determined to exist for a 450 m length of levee. The coefficient of permeability of the sand is 3 m/day. SEE H-87
footing at A A. B.
218 kN/m2 196 kN/m2
C. 211 kN/m2 D. 205 kN/m2
93. Compute the total vertical pressure at a point 5 m below the footing at B.
87. Compute the hydraulic gradient A. B.
0.0494 0.0259
C. 0.1326 D. 0.0833
88. Compute the quantity of water which flows into the ditch in liters/sec A. B.
1.95 liters/sec 4.06 liters/sec
C. 2.36 liters/sec D. 3.22 liters/sec
A. B.
142.72 131.60
C. 138.55 D. 124.95
94. Compute the total vertical pressure at a point 5 m below the footing at C A. B.
158 kN/m2 173 kN/m2
C. 164 kN/m2 D. 151 kN/m2.
89. Compute the seepage velocity if the porosity of the sand is
Problem 95-97:
0.22
From the given soil profile shown, the ground surface is
A. B.
0.88 m/day 2.73 m/day
C. 1.14 m/day D. 3.00 m/day
subjected to a uniformly distributed load of 80kPa SEE H-95 95. Compute the compression index
Problem 90 A rectangular footing 3 m x 4 m located 2 m below the ground level is to be constructed on sand having a unit weight of 18.8 kN/m3. The footing is designed to take a total load of 6000 kN. If the arithmetic mean of SPT, N-values measured within the zone of influence is 36. Compute the settlement of the footing. Use
S=B0.75
1.7 2 Pc [q− ] 1.4 3 N
A. B.
0.145 0.288
C. 0.338 D. 0.527
96. Compute the present overburden Po at mid-height A. B.
70.257 kPa 75.418 kPa
C. 73.884 kPa D. 78.468 kPa
97. Compute the total settlement due to primary consolidation A. B.
223 mm 216 mm
C. 238 mm D. 229 mm
Problem 98-100: The shear strength of a normally consolidated clay can be given
A. B.
11.8 mm 13.5 mm
C. 9.12 mm D. 16.8 mm by the equation
τ f =σ ' tan28 °
. A consolidated-undrained
Problem 91:
axial test was conducted on a clay sample with the following
A foundation footing is to support a column loading of 2250 kN.
results
The building site is underlain by a thick stratum of sand. Tests on
Chamber confining pressure = 110 kPa
soil samples obtained from the site indicate dry unit weights for
Deviator stress at failure = 100 kPa
sand to be 16 kN/m3. The design calls for the footing to be located 1 m below the ground level of the building. Preliminarily design data indicates that a soil bearing pressure of 250 kPa can be used. The modulus of vertical subgrade reaction which is
98. Compute the consolidation undrained friction angle A. B.
18°21’ 14°04’
C. 0.516 D. 0.793
determined directly from a plate bearing test performed in the
99. Compute the pore water pressure developed on the clay
field at the planned location of the structure was found to be Kv
specimen at failure
= 4.5 x 10 3 kN/m3. Estimate the foundation settlement. A. B.
15 mm 22 mm
C. 26 mm D. 18 mm
A. B.
52.48 kPa 79.05 kPa
C. 53.50 kPa D. 61.03 kPa
100. For the same clay specimen, what would have been the deviator stress at failure if a drained test had been conducted
Problem 92-94: A rectangular footing 6m x 8m carries a vertical load of 12000 kN as shown on the figure. Unit weight of soil is 16 kN/m3 SEE H-92
with the same confining pressure of 110 kPa? A. B.
194.68 kPa 203.12 kPa
C. 210.66 kPa D. 188.55 kPa
