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HGE [REVIEW INNOVATIONS] > GEO TERMS: PROPERTIES OF SOIL > Flashcards

GEO TERMS: PROPERTIES OF SOIL Flashcards

1
Q

buoyant unit weight equals the saturated density

A. multiplied by unit weight of water
B. divided by unit weight of water
C. plus unit weight of water
D. minus unit weight of water

A

D. minus unit weight of water

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2
Q

you are given a sample of soil containing coarse grains to determine its water content, you will use _____

A. pycnometer
B. oven-drying method
C. calcium carbide method
D. alcohol method

A

A. pycnometer

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3
Q

select the correct statement:

A. unit weight of dry soil is greater than unit weight of wet soil

B. for dry soils, dry unit weight is less than total unit weight

C. unit weight of soil increases due to submergence in water

D. unit weight of soil decreases due to submergence in water

A

D. unit weight of soil decreases due to submergence in water

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4
Q

fundamental relationship between dry density (dy), bulk density (y) and
water content (w), is:
Ay =vd/(1 + w)
B.va = v/(1 + w)
C.w v/ (1 + ya)
D.w v/(1 - vyg)

A

FINALIZE

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5
Q

pick up the correct statement from the following:

A. the void ratio in soils is defined as the ratio of the volume of voids to the volume of solids

B. the bulk density of a soil is defined as the unit weight of the soil

C. the dry density of a soil is defined as weight of solids to the total volume of the soil

D. all the above

A

D. all the above

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6
Q

if the water content of a fully saturated soil mass is 100%, then the voids ratio of the sample is _____

A. less than specific gravity of soil
B. equal to specific gravity of soil
C. greater than specific gravity of soil
D. independent of specific gravity of soil

A

B. equal to specific gravity of soil

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7
Q

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 _____

A. quick condition
B. boiling condition
C. quick sand
D. all the above

A

D. all the above

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8
Q

which of the following methods is most accurate for the determination of the water content of soil?

A. oven drying method
B. sand bath method
C. calcium carbide method
D. pycnometer method

A

A. oven drying method

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9
Q

Fundamental relationship between dry
density (va), specific gravity (G),
water content (w) and percentage of
air voids (ma) is:
Va =(1-na) Gyo/ (1+0G)
. Ya =(1+na) Gyo/ (1+wG)
- Ya =(1+na) Gya/ (1-0G)
- Ya =(1-na) Gya/ (1-0G)

A

FINALIZE

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10
Q

the ratio of the weight of water to the weight of solids in a given mass of soil, is known _____

A. porosity
B. specific gravity
C. void ratio
D. water content

A

D. water content

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11
Q

if “G” is specific gravity of sand particles, “e” is void, the critical hydraulic gradient is _____

A. ic = (G+1) / (1-e)
B. ic = (G+1) / (1+e)
C. ic = (G-1) / (1+e)
D. ic = (G-1) / (1-e)

A

C. ic = (G-1) / (1+e)

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12
Q

the weight of a container is W1 and that of container with soil sample, is W2; if the weight of the container and oven dried soil sample is W3, the moisture content of the soil is _____

A. [(W2-W3) / (W3-W1)] x 100
B. [(W3-W2) / (W1-W2)] x 100
C. [(W1-W2) / (W2-W3)] x 100
D. [(W2-W1) / (W1-W3)] x 100

A

A. [(W2-W3) / (W3-W1)] x 100

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13
Q

water content of soil can _____

A. never be greater than 100%
B. take values only from 0% to 100%
C. be less than 0%
D. be greater than 100%

A

D. be greater than 100%

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14
Q

if the voids of a soil mass are full of air only, the soil is termed as _____

A. air entrained soil
B. partially saturated soil
C. dry soil
D. dehydrated soil

A

C. dry soil

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15
Q

pick up the correct statement from the following:

A. the void space between the soil grains is filled partly with air and partly with water

B. in perfectly saturated soil, the voids are completely filled with water

C. in dry soil, the voids are completely filled with air

D. all the above

A

D. all the above

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16
Q

if the bulk density “p” of the soil is and water content “w”, then dry density of the soil is _____

A. 1+ (w/p)
B. (1+p)/w
C. p/(1+w)
D. w/ (1+p)

A

C. p/(1+w)

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17
Q

when the degree of saturation is zero, the soil mass under consideration represents _____

A. one phase system
B. two phase system with soil and air
C. two phase system with soil and water
D. three phase system

A

B. two phase system with soil and air

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18
Q

for proper field control, which of the following methods is best suited for quick determination of water content of a soil mass?

A. oven drying method
B. sand bath method
C. alcohol method
D. calcium carbide method

A

D. calcium carbide method

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19
Q

the water content of soil is defined as the ratio of _____

A. volume of water to volume of given soil
B. volume of water to volume of voids in soil
C. weight of water to weight of air in voids
D. weight of water to weight of solids of given mass of soil

A

D. weight of water to weight of solids of given mass of soil

20
Q

the ratio of the volume of water present in a given soil mass to the total volume of its voids is known _____

A. porosity
B. void ratio
C. percentage voids
D. degree of saturation

A

D. degree of saturation

21
Q

the ratio of the volume of voids to the total volume of the given soil mass is known _____

A. porosity
B. specific gravity
C. void ratio
D. water content

A

A. porosity

22
Q

a fully saturated soil is said to be _____

A. one phase system
B. two phase system with soil and air
C. two phase system with soil and water
D. three phase system

A

C. two phase system with soil and water

23
Q

a pycnometer is used to determine _____

A. voids ratio
B. dry density
C. water content
D. density index

A

C. water content

24
Q

the specific yield of soil depends upon _____

A. compaction of stratum
B. distribution of pores
C. shape and size of particles
D. all the above

A

D. all the above

25
Q

sedimentation analysis is based on the assumption:

A. soil particles are spherical
B. particles settle independent of other particles
C. walls of the jar do not affect the settlement
D. all the above

A

D. all the above

26
Q

a pycnometer is used to determine _____

A. water content and voids ratio
B. specific gravity and dry density
C. water content and specific gravity
D. voids ratio and dry density

A

C. water content and specific gravity

27
Q

valid range for S, the degree of saturation of soil in percentage is _____

A. S > 0
B. S < 0
C. 0 < S < 100
D. 0 ≤ S ≤ 100

A

D. 0 ≤ S ≤ 100

28
Q

the ratio of volume of voids to the total volume of soil mass is called _____

A. air content
B. porosity
C. percentage air voids
D. voids ratio

A

B. porosity

29
Q

the ratio of the volume of voids to the volume of soil solids in a given soil mass is known _____

A. porosity
B. specific gravity
C. void ratio
D. water content

A

C. void ratio

30
Q

the hydrometer method of sedimentation analysis differs from the pipette analysis mainly in _____

A. the principle of test
B. the method of taking observations
C. the method of preparation of soil suspension
D. all of the above

A

B. the method of taking observations

31
Q

the ratio of the weight of given volume of soil solids to the weight of an equal volume of distilled water at the given temperature, is known _____

A. porosity
B. specific gravity
C. void ratio
D. water content

A

B. specific gravity

32
Q

a partially saturated soil is classified as _____

A. one phase soil
B. two phase soil
C. three phase soil
D. four phase soil

A

C. three phase soil

33
Q

The general relationship between
specific gravity (G), weight of water
(yw) , degree of saturation(S), void
ratio (e) and bulk density (y), is
(S -eS)yw/ (1 + e)
(G + eS)yw/ (1 + e)
(1 +eyw/ (G+5)
(L -8S)e/ (G +8)

A

FINALIZE

34
Q

pick up the correct statement from the following:

A. in hydrometer method, weight Wd per ml of suspension is found directly

B. in pipette analysis, weight Wd per ml of suspension is found indirectly

C. in pipette analysis, weight Wd per ml of suspension is found directly

D. none of these

A

C. in pipette analysis, weight Wd per ml of suspension is found directly

35
Q

valid range for n, the percentage voids is _____

A. 0 < n < 100
B. 0 ≤ n ≤ 100
C. n > 0
D. n < 0

A

A. 0 < n < 100

36
Q

voids ratio of a soil mass can _____

A. never be greater than unity
B. be zero
C. take any value greater than zero
D. take values between 0 and 1 only

A

C. take any value greater than zero

37
Q

the relationship between void ratio (e) and porosity ratio (n) is _____

A. n = (1+e) / (1-e)
B. e = (1+n) / (1-e)
C. n = e / (1-e)
D. e = n / (1-n)

A

D. e = n / (1-n)

38
Q

W is the weight of soil having a moisture content w; if V is the volume of proctor’s mould, the dry density of the soil is _____

A. WV / (1+w)
B. V / W(1+w)
C. W / V(1+w)
D. V(1+w) / W

A

C. W / V(1+w)

39
Q

the specific gravity of quartz is _____

A. 2.65
B. 2.72
C. 2.85
D. 2.90

A

A. 2.65

40
Q

in hydrometer analysis for a soil mass

A. both meniscus correction and dispersing agent correction are additive

B. both meniscus correction and dispersing agent correction are subtractive

C. meniscus correction is additive and dispersing agent correction is subtractive

D. meniscus correction is subtractive and dispersing agent
correction is additive

A

C. meniscus correction is additive and dispersing agent correction is subtractive

41
Q

The fundamental equation of specific
gravity (G), dry density (y), unit
weight of water (y«) and void ratio
(e), is
A.e = Gyw/(1 + va)
B.G = vavw/ (1 + e)
C.va = Gyw/ (1 + e)
D.yw = Gya/ (1 + e)

A

FINALIZE

42
Q

accurate determination of water content is made by _____

A. calcium carbide method
B. sand bath method
C. alcohol method
D. oven-drying method

A

D. oven-drying method

43
Q

a fundamental equation of void ratio (e), specific gravity (G), water content (w) and degree of saturation (S) is _____

A. e = wG/S
B. w = eG/S
C. G = ew/S
D. S = ew/G

A

A. e = wG/S

44
Q

water content of a soil sample is the difference of the weight of the given sample at the given temperature and the weight determined after drying it for 24 hours at temperature ranging from _____

A. 80° to 90°C
B. 90° to 95°C
C. 103° to 105°C
D. 105° to 110°C

A

D. 105° to 110°C

45
Q

determination of water content of a soil sample suspected to contain gypsum is made by drying the sample for longer period at a temperature not more than _____

A. 60°C
B. 80°C
C. 100°C
D 110°C

A

B. 80°C

46
Q

the specific gravity of approximately _____

A. 1.6
B. 2.0
C. 2.2
D. 2.6

A

D. 2.6

HGE [REVIEW INNOVATIONS] (16 decks)

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