Geotech

Question 1

Ratio of volume of voids and volume of soil.

Answer 1

Porosity

Question 2

Ratio of volume of voids and volume of soil solids.

Answer 2

Void Ratio

Question 3

Ratio of volume of water and volume of soil.

Answer 3

None of the above

Question 4

Which is true for porosity?

Answer 4

0 < n < 100

Question 5

Which is true for void ratio?

Answer 5

0 < e

Question 6

Which is true for degree of saturation?

Answer 6

0 ≤ S ≤ 100

Question 7

When the seepage pressure becomes equal to the pressure due to submerged weight of a soil, the effective pressure is reduced to zero and the soil particles have a tendency to move up in the direction of flow. This phenomenon is generally known:

Answer 7

Quick Condition/Boiling Condition/Quick Sand

Question 8

What is soil in civil engineering?

Answer 8

The unaggregated and uncemented deposits of minerals and organic particles covering the earth’s crust

Question 9

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

Answer 9

Decreases

Question 10

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

Answer 10

Load imposed onto the soil

Question 11

A process by which water-saturated soil sediment temporarily loses strength and acts as a fluid.

Answer 11

Liquefaction

Question 12

Volume change in saturated soils caused by the expulsion of pore water from loading?

Answer 12

Primary Consolidation

Question 13

Negative skin friction on piles..

Answer 13

• Is caused due to relative settlement of the soil
• Is caused in soft clays
• Decreases the pile capacity
• All of the above

Question 14

A decrease in water content results in a reduction of the volume of soil in:

Answer 14

Liquid state, Plastic state, Semi-solid state (All of these)

Question 15

The water content in a soil sample when it continues to loose weight without loosing the volume, is called

Answer 15

Shrinkage limit

Question 16

The admixture of coarser particles like sand or silt to clay causes

Answer 16

Decrease in both liquid limit and plasticity index

Question 17

An index used to identify the swelling potential of clay soils is called

Answer 17

Activity

Question 18

The property of a soil which permits water to percolate through it

Answer 18

Permeability

Question 19

Which of the following methods is best suited for determination of permeability of coarse grained soils?

Answer 19

Constant Head Method

Question 20

Which of the following methods is best suited for determination of permeability of fine grained soils?

Answer 20

Falling Head Method

Question 21

Terzaghi’s bearing capacity factors Nc, Nq and Nγ are functions of

Answer 21

Angle of internal friction only

Question 22

Coefficient of earth pressure at rest is: (A). Less than active earth pressure but greater than passive earth pressure (B). Greater than active earth pressure but less than passive earth pressure (C). Greater than both the active earth pressure and passive earth pressure (D). Less than both the active and passive earth pressures

Answer 22

Option B

Question 23

The average coefficient of permeability of natural deposits: A. Parallel to stratification is always greater than that perpendicular to stratification B. Parallel to stratification is always less than that perpendicular to stratification C. Is always same in both directions D. Parallel to stratification may or may not be greater than that perpendicular to stratification

Answer 23

Option A

Question 24

The quantity of seepage of water through soils is proportional to: A. Coefficient of permeability of soil / B. Total head loss through the soil / C. Neither A nor B / D. Both A and B

Answer 24

Option D

Question 25

The critical exit gradient of seepage water in soils, increases with: A. An increase in specific gravity / B. A decrease in specific gravity / C. A decrease in void ratio / D. Both A and C

Answer 25

Option D

Question 26

Who is the father of modern soil mechanics?

Answer 26

Karl Terzhagi

Question 27

Rise of water table above the ground surface causes: A. Equal increase in pore water pressure and total stress B. Equal decrease in pore water pressure and total stress C. Increase in pore water pressure but decrease in total stress D. Decrease in pore water pressure but increase in total stress

Answer 27

Option A

Question 28

The shear strength of a soil: A. Is directly proportional to the angle of internal friction of the soil B. Is inversely proportional to the angle of internal friction of the soil C. Decreases with increase in normal stress D. Decreases with decrease in normal stress

Answer 28

Option D

Question 29

Effective stress on soil: A. Increases voids ratio and decreases permeability B. Increases both voids ratio and permeability C. Decreases both voids ratio and permeability D. Decreases voids ratio and increases permeability

Answer 29

Option C

Question 30

The coefficient of compressibility of soil, is the ratio of

Answer 30

strain to stress

Question 31

What is the largest grain that passes a no. 200 sieve in millimeters?

Answer 31

0.074

Question 32

Section 302.2.2 of the National Structural Code of the Philippines provides that the slope of cut surfaces of the ground shall be no steeper than is safe for the intended use and shall be no steeper that:

Answer 32

1 to 2

Question 33

The fraction of soils passing which sieve number is used for Atterberg Limits tests of soils:

Answer 33

40

Question 34

Coefficient of consolidation of a soil is affected by

Answer 34

Both compressibility and permeability

Question 35

If the sand in-situ is in its densest state, then the relative density of sand is:

Answer 35

1

Question 36

Accurate determination of water content, is made by

Answer 36

Oven Drying Method

Question 37

cobbles

Answer 37

particles with a diameter larger than 75 mm

Question 38

gravel

Answer 38

particle sizes from 4.75 to 75 mm

Question 39

sand

Answer 39

particle sizes from 0.075 mm to 4.75 mm

Question 40

fines

Answer 40

particles smaller than 0.075 mm (silt and clay)