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RCE 2024 TERMINOLOGIES > Hydraulics and Geotechnical Principle Engineering > Flashcards

Hydraulics and Geotechnical Principle Engineering Flashcards

1
Q

It is the ratio of volume of void spaces to volume of solid substance.

A

Void Ratio

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2
Q

It is the ratio of volume of voids to the volume of soil sample / specimen.

A

Porosity

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3
Q

It is the ratio of volume of water in the void spaces to volume of voids.

A

Degree of Saturation

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4
Q

It is the ratio of water to the weight of solids in a given volume of soil.

A

Moisture Content

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5
Q

Weight of soil per unit volume

A

Unit weight

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6
Q

Weight of soil per unit volume without water

A

Dry unit weight

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7
Q

The bulk unit weight of a soil when it is 100 percent saturated

A

Saturated unit weight

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8
Q

Total wet / moist unit weight. It is the total weight over total volume

A

Bulk unit weight

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9
Q

The hydraulic gradient that brings soil (essentially, coarse-grained soils) to static liquefaction

A

Critical hydraulic gradient, i

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10
Q

The ratio of the total mass to the total volume of a unit of soil. Usually expressed as a unit weight where weight is interchanged with mass.

A

Density

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11
Q

The ratio of the mass of the solids (soil grains) to the total unit volume of soil

A

Dry Density

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12
Q

Density of granular soil relative to the minimum and maximum densities achieved for that particular soil.

A

Density Index / Relative Density

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13
Q

Difference between the total density and the density of water.

A

Submerged / buoyant density

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14
Q

Used to describe the degree of firmness of soil

A

Consistency

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15
Q

The attraction of one water to another resulting from hydrogen bonding (water-water bond)

A

Cohesion

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16
Q

It invloves the attraction of water molecule to a nonwater molecule (water-non water bond)

A

Adhesion

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17
Q

The capacity of soil to adhere to other objects. It is estimated at mositure content that displays macimum adherence between thumb and forefinger.

A

Stickiness

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18
Q

A field of measure of the ability of soil to withstand an applied stress or pressure as applied using the thumb and forefinger.

A

Rupture Resistance

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19
Q

The limits of water content used to define soil behavior

A

Atterberg’s Limit

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20
Q

The moisture content in percent required to close a distance of 12.7 mm along the bottom of the groove after 25 blows (defined as the moisture content at which soil beigns to behave as a liquid material and begins to flow)

A

Liquid Limit

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21
Q

The device used in this method consists of a brass cup and a hard rubber. The brass cup is dropped onto the base by a cam operated by crank.

A

Cup Method to Determine Liquid Limit

22
Q

The moisture content at which the transition from semi-solid to plastic state.

A

Plastic Limit

23
Q

The moisture content at which the transition from solid to semi-solid takes place defined as the moisture content at which no further volume chnage occurs with further reduction in moisture content.

A

Shrinkage Limit

24
Q

Ratio which signifies the relative consistency of a cohesive in the natural state

A

Liquidity Index

25
Q

Degree of a soik can be molded or reworked causing permanent deformation without rupturing

A

Plasticity

26
Q

The ratio of the difference between the liquid limit and water content to the difference between the liquid limit and the plasticity index.

A

Consistency Index

27
Q

Difference between the liquid limit and plastic limit of a soil

A

Plasticity Index

28
Q

Soils formed by the weathered products at their place of origin

A

Residual soil

29
Q

Soils formed by deposition of quiet lakes

A

Lacustrine Soil

30
Q

Soils transported by running water and deposited along streams

A

Alluvial Soil

31
Q

Soils formed by the transportation and deposition of glaciers

A

Glacial Soil

32
Q

Soils deformed by deposition in the seas

A

Marine Soil

33
Q

Soil with occasional particles of quartz, fledspar, and other minerals

A

Gravel Soil

34
Q

Soil transported and deposited by wind

A

Aelian Soil

35
Q

Defined the ratio of the plasticty index to the percent of clay size fraction, by weight as activity.

A

Skempton

36
Q

Difference between the plastic and shrinkage limits.

A

Shrinkage Index

37
Q

Used to determine the grain size distribution of coarse-grained soil.

A

Sieve Analysis

38
Q

Used to determine the grain size distribution of the soils passing the No. 200 sieve.

A

Hydrometer Analysis

39
Q

This diameter in the particle size distribution curve corresponding to 10% finer. It is used to measure the hydraulic conductivity and drainage through the soil.

A

Effective size

40
Q

Used to determine the following four (4) parameters for a given soil.

A

Particle-Size Distribution Curve

41
Q

Defined as the ratio between the grain diameter (in mm) corresponding to 60% passing on the curve (D60) divided by the diameter of the 10% (D10) passing.

A

Coefficient of Uniformity

42
Q

Defined as the ratio between the square of the grain diameter (in mm) corresponding to 30% passing on the curve (D30) divided y the product of the grain diameter of the 60% passing and the diameter of the 10% passing.

A

Coefficient of Gradation

43
Q

A measure of the shape parameter obtained from a grain size distribution curve.

A

Coefficient of Curvature

44
Q

A type of soil in the particle size distribution curve in which most of the soil grains are the same.

A

Poorly Graded

45
Q

A system that has 8 major group for soil classification.

A

AASHTO System

46
Q

A system for soil classification that describes texture. It can be applied to most unconsolidated materials.

A

USCS System

47
Q

Soils with more than 50% by weight of grains retained on the #200 sieve (0.075 mm)

A

Coarse-grained soils

48
Q

Silt and Clay Soils. Soils containing particles smaller than No. 200 sieve or 0.075 mm in size according to the Unified Soil Classification System.

A

Fine-grained soils

49
Q

According to the USCS Soil Classification of a soil particle whose size is greater than 75 mm is called ____

A

Cobbles

50
Q

also called as Textural classification system

A

USDA System

51
Q

Soil particles which are finer (smaller) than 0.002 mm in size.

A

Clay

52
Q
A

RCE 2024 TERMINOLOGIES (4 decks)

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