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問題一覧
1
PRINCIPLE: A body placed in a liquid is buoyed up by a force equal to the weight of the displaced liquid.
Archimedes
2
In AASHTO, soil greather than 75mm is classified as _______.
Cobbles
3
PRINCIPLE: In any stream flowing steadily without friction, the total energy contained is the same at every point in its path of low.
Bernoulli
4
The shear strength of a cohesionless soil is ______.
Proportional to the tangent of the angle of shearing resistance
5
PRINCIPLE: The pressure exerted onto a liquid is transmitted undiminished to all portions of the liquid.
Pascal
6
The component of Shear Strength of a rock or soil that interparticle friction.
Cohesion
7
______ is a device used to determine the undrained shear streghth of the soil which consists of four equal-sized thin steel plates welded to a steel torque rod.
Shear Vane
8
In USCS, which are considered coarse grained if the passing through no. 200 sieve is less than ____.
50
9
The weight per unit volume of a liquid at a standard temperature and pressure is called:
Specific Weight
10
The ratio of the volume of voids and the volume of solids.
Void Ratio
11
A cohesive soil deposit is considered SOFT if the unconfined compression strength in kPa is between:
24 to 48
12
The volume of liquid passing a cross-section of a steam.
Discharge
13
It is a soil whose present effective over burn pressure is less than that which the soil experienced in the past.
Over Consolidated
14
Molecules of liquid gets attracted to _______.
Surface Tension
15
Section 302.2.2 of the NSCP provides that the slope of cut surfaces shall be no steeper than is safe for intended use and shall be no steeper than ______.
1 to 2
16
The largest grain size that passed a no. 200 in mm is ___.
0.0740mm
17
A granular soil deposit is considered MEDIUM if the blow count of a standard penetration is between:
10 to 30
18
The groud water table is located at a certain depth below the ground surface. This will cause an upward seepage. What would be the resulting effective stress at a certain point below the ground water table due to the upward seepage?
This will cause the decrease of the effective stress at that point
19
The ratio between the volume of voids and the total volume of the soil mass.
Porosity
20
If with steady flow in any length or reach of a steam, the average velocity at ever cross-section is the same in that reach.
Uniform Flow
21
Prone to Settlement under vibratory load.
40
22
The force why small insects can walk on the water.
Surface Tension
23
When at any instant, the number of particles passing every section of the stream are always equal, the flow is said to be ______.
Continuous Flow
24
When the metacenter of a floating body is lower than the center of gravity, then the body will be in _______.
Unstable equilibrium
25
Where is the metacenter for stable equilibrium?
Above the center of gravity
26
What happens when there is a lowering of water table?
There is a decrease of lateral pressure
27
What would happen if the ground water table will be at the ground level?
Decrease in the Vertical Pressure
28
A ship floating in seawater is stable if the metacentric height is:
Above the center of gravity
29
NOT component of the soil mass:
None of the above
30
The intensity of vertical stress at a depth due to a point load acting on the surface of a semi infinite elastic soil mass is ______.
Directly proportional to the square of depth
31
The ratio between the volume of the water and the volume of the voids in a soil mass.
Degree of Saturation
32
Water has a maximum unit weight at a temperature of __.
4 Degree Celsius
33
The fraction of soil passing which sieve number is used for Atterberg Limits tests of soils?
40
34
If the volume of voids is eaual to the volume of solids, what is the porosity and void ratio equal to respectively?
0.5 and 1.0
35
If we increase the compaction energy, what will happen to the maximum dry density (MDD)?
The dry unit weight of soil will increase
36
In what plane is the additional stress (deviator stress) can affect the shear stress?
Horizontal Plane
37
Triaxial Shear Test acts on what axis?
All plane axis except x and y axis
38
Nc, Nq, and Ny are function of _______.
Angle of Friction
39
A process by which water-saturated soil sediment temporarily loss strength and acts as a fluid.
Liquefaction
40
In the Cohesion Strength, k is equal to ____.
0.50
41
Specific Weight of liquid _________.
Does not vary on any other planet
42
One of the following conditions DOES NOT affect the bearing capacity of the supporting soil:
Load imposed onto the soil
43
If the discharge passing a given cross-section of a stress is constant with time.
Steady Flow
44
When the path lines of the individual particles of a flowing liquid are irregular curves and continually cross each other and form a complicated network.
Turbulent Flow
45
If the ground water table in soil formation rises as a resulting of flooding, the bearing capacity of the soil _____.
Decrease
46
______ is a branch of hydraulics which deals with the study of forces (including velocity and acceleration) exerted by or upon liquids in motion.
Hydrodynamics
47
What test is NOT performed in laboratory?
Vane Test
48
Ratio of weight of water to the weight of solid particles.
Water Content
49
NOT characterisitic of cohesionless soils:
High Shear Strength
50
______ is the most used property in soil properties.
Void Ratio
51
The metacentric height is the distance between the ______.
Center of gravity of the floating body and the metacenter
52
DOES NOT affect foundation settlement:
None of the above
53
It occurs in soils of saturated cohesionless particles such as sand and causes a sudden drop in shear strength and its bearing capacity. In effect, the soil turns to a liquid, allowing everything it previously supported to sink.
Liquefaction
54
Value of surface tension at normal room temperature.
0.064 N/m
55
A Pressure Surge or Wave caused when a fluid in motion is forced to stop or change direction suddenly (momentum change) is referred to in Hydraulics as:
Water Hammer
56
Soil derives its strength from its capacity to resist ____.
Shear
57
The Shear Strength of a soil _______.
Increases with increase normal stress
58
Negative Skin Friction on Piles ________.
All of the above
59
A line joining the points of the highest elevation of water in a series of vertical open pipes rising from a pipeline in which water flows under pressure is referred to as:
Hydraulic Gradient
60
______ is an abrupt rise in water surface which results from retarding water flowing at lower stage.
Hydraulic Jump
61
In Civil Engineering, soil is _______.
Uncemented Aggregate