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CELE > HGE > Flashcards

HGE Flashcards

1
Q

A line joining the points of 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

A

hydraulic gradient

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2
Q

According to ASTM D2487-17, particles of rock that will pass a 3-in (75 mm) sieve and be retained on a No. 4 (4.75 mm) US standard sieve is called

A

gravel

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3
Q

NSCP 302.2 Cuts: Unless otherwise recommended in the approved geotechnical engineering report or engineering report, cuts shall conform to the provisions of this section. In the absence of an approved geotechnical engineering report, these provisions may be waived for cuts ________ meters or less in height, involving intact rock or hard soil, that are not intended to support structures.

A

3

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4
Q

NSCP 302.4 Fills: Unless otherwise recommended in the approved geotechnical engineering report, fills shall conform to the provisions of this section. In the absence of an approved geotechnical engineering report or engineering report, these provisions may be waived for minor fills (H ≤ ________ m) not intended to support structures.

A

2

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5
Q

NSCP 302.4.5 Slopes: The slope of cut surfaces shall be no steeper than is safe for the intended use and shall be no steeper than 1 unit vertical in ________ units horizontal unless substantiating data justifying steeper slopes are submitted and approved.

A

2

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6
Q

NSCP 302.4.4 Compaction: All fills shall be compacted in litis not exceeding ________ cm in thickness to a minimum of 90 percent of maximum density as determined by ASTM Standard D-1557.

A

20

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7
Q

The elastic tendency of liquids which makes them acquire the least surface area possible. It is responsible, for example, when an object or insect such as mosquitoes that is denser than water is able to float or run along the water surface.

A

surface tension

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8
Q

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

A

water hammer

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9
Q

If the ground water table in a soil formation rises as a resulting of flooding, the bearing capacity of the soil

A

decreases

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10
Q

One of the following foundation conditions does not affect the bearing capacity of the supporting soil.

A

Load imposed onto the soil

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11
Q

What is the most used property in soil mechanics?

A

void ratio

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12
Q

It is the ratio of weight of the water to the weight of the soil solid particles.

A

water content

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13
Q

NSCP 302.5.2 Top of Cut Slope: The top of cut slopes shall not be made nearer to a site boundary line than one fifth of the vertical height of cut with a minimum of 0.6 m and a maximum of ________. The setback may need to be increased for any required interceptor drains.

A

3 m

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14
Q

NSCP 302.5.3 Toe of Fill Slope: The toe of a fill slope shall be made not nearer to the site boundary line than one half the height of the slope with a minimum of 0.6 m and a maximum of ________.

A

6 m

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15
Q

The state of fluidity occurring generally in granular soils.

A

liquefaction

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16
Q

The ability of soil to allow water to flow through it.

A

permeability

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17
Q

The moisture content of a soil, at which a given amount of compaction produces the highest value of dry density.

A

optimum moisture content

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18
Q

The water content corresponding to the limit between the liquid and plastic states of consistency of the soil.

A

liquid limit

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19
Q

The water content corresponding to the lowest water content at which the soil becomes plastic.

A

plastic limit

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20
Q

The weight of water expressed as a percentage of the total dry weight of a soil material:

A

natural moisture content

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21
Q

The highest pressure which a structure can exert on a blank of earth without causing it move in the direction of the pressure:

A

active pressure

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22
Q

A measure of size of mineral particles of soils or rock: a physical characteristic of the particles of soil which affects its mechanical properties: used in classification and identification of soils:

A

sieve analysis

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23
Q

An instrument to measure the density of soil:

A

densometer

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24
Q

A foundation failure in which a surface of rupture is formed in the soil, the foundation settles considerably and probably tilts to one side and heaving of the soil occurs on one or both sides of the foundation:

A

shearing failure

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25
Q

The horizontal pressure that an earth mass exerts on a wall:

A

active

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26
Q

Plasticity index is:

A

the numerical difference between the liquid limits and the plastic limits

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27
Q

It is the pressure at a point equal to the depth of that point below ground water level times the unit weight of water. This head is considered in the design of basement floors and similar horizontal elements below the water table.

A

hydrostatic pressure

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27
Q

Water content corresponding to the limit between the liquid and plastic states of consistency of a soil:

A

liquid limit

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28
Q

The lowest water content at which a soil becomes plastic.

A

plastic limit

29
Q

The process by which a liquid is drawn into and tends to fill permeable pores in a porous solid and increase is mass of a porous solid resulting from the penetration of a liquid into its permeable pores known as:

A

absorption

30
Q

The state in which two surface are held together by interfacial effects which may consist of molecular forces, interlocking action, or both are known as:

A

adhesion

31
Q

The maximum unit pressure to which a soil or other material should be subjected to guard against shear failure or excessive settlement is known as:

A

allowable bearing capacity

32
Q

An arbitrary water contents (shrinkage limit, plastic limit, liquid limit) determined by standard test that define the boundaries between the different states of consistency of plastic soils is called as:

A

Atterberg Limits

33
Q

The ratio of the volume of water in the void spaces to the volume of voids is called:

A

degree of saturation

34
Q

The ratio of the weight of the soil specimen to the volume of the soil specimen is called:

A

moist unit weight

35
Q

In granular soils, the degree of compaction in the field can be measured and is known as:

A

relative density

36
Q

The moisture content which the soil changes from a semi-solid state to a solid state is defined as

A

shrinkage limit

37
Q

The moisture content which the soil changes from plastic to a semi-solid stage is defined as

A

plastic limit

38
Q

The difference between liquid limit and the plastic limit of a soil.

A

plasticity index

39
Q

The percentage of moisture content at which a groove closure of 12.5 mm occurs at 25 blows is known as:

A

liquid limit

40
Q

The moisture content at which the soil changes from a liquid to plastic stage is

A

liquid limit

41
Q

The gradual increase in the effective stress in the clay layer which causes gradual settlements over a period of time is.

A

consolidation

42
Q

Compaction of soil increases its density and produces some effects such as:
a. an increase in shear strength of the soil
b. a decrease in future settlement of soil
c. decrease in its permeability
d. all of the above

A

all of the above

43
Q

It is wearing away of the ground surface as a result of the movement of wind or water

A

erosion

44
Q

It is a graphical or pictorial method for solving normal and shear stresses on any plane once the stresses on orthogonal planes are known. This method uses the simple properties of a circle and simplifies the calculation necessary for determining the stresses.

A

Mohr’s Circle

45
Q

The phenomenon in which water rises above the groundwater table against the pull of gravity but it is in contact with the water table as its source.

A

capillarity rise

46
Q

The theory that is based on the concept of a failure wedge bounded by the wall face and by a failure surface passing through the toe of the retaining wall is

A

Coulomb’s Theory

47
Q

The flow of water along contact surface between structure and soil or rock foundations, especially in dams is termed as:

A

seepage

48
Q

It is a pressure caused by the weight of earth or its sideways pressure.

A

earth pressure

49
Q

____________________ is widely employed as an in-situ technique to assess the undrained shear strength of soil, particularly in the case of soft clays. The experiment is conducted using a specialized apparatus comprising of a cylindrical rod affixed with blades, which is put into the soil and subsequently rotated.

A

Vane shear test

50
Q

The component of shear strength of a rock or soil that interparticle friction is called

A

cohesion

51
Q

A ship floating in seawater is stable if the metacenter

A

is above the center of gravity

52
Q

Soil derives its strength from its capacity to resist

A

shear

53
Q

Which of the following is not a component of the soil mass?
a. minerals
b. organic matter
c. gas
d. none in the list

A

none in the list

54
Q

If with steady flow in any length or reach of a stream, the average velocity at every cross section is the same in that reach, the flow is said to be

A

uniform

55
Q

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, the flow is called

A

turbulent

56
Q

In USCS, a solid having a size larger than the No. 200 sieve (0.074 mm) but smaller than the No. 4 sieve (4.75 mm opening) is called

A

sand

57
Q

If the discharge passing a specific cross-sectional area of a pipe remains constant with time, the flow at that particular section is referred to as

A

steady

58
Q

not a characteristic of cohesionless soil

A

practically impermeable

59
Q

At any given moment, the number of particles passing every section of the stream is equal, the flow at that particular section is referred to as

A

continuous

60
Q

A granular soul deposit is considered medium dense if the blow count of a standard penetration test is between _______.

A

10 to 30

61
Q

The unit weight of dry air (at 0°C and standard barometer pressure) in N/meter³ is

A

12.7

62
Q

The pressure exerted onto a liquid is transmitted equally and undiminished to all portions of the liquid. Thus principle in fluid mechanics is known as

A

Pascal’s

63
Q

For the value of atmospheric pressure at sea level used in engineering practice, evaluate about how high, in meters, is the atmosphere above sea level

A

8500

64
Q

Not a characteristic of cohesive soil

A

Low shear strength

65
Q

Largest grain size that may pass through a No. 200 sieve

A

0.074 mm

66
Q

Atterberg limit tests is done on aggregates that pass through what sieve size

A

No. 40 mesh or 0.425 mm

67
Q
A
68
Q
A
69
Q
A

CELE (3 decks)

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