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HGE > Geotechnical > Flashcards

Geotechnical Flashcards

1
Q

Ratio between volume of water and the volume of voids

A

Degree of saturation

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2
Q

The ratio between the volume of voids and the volume of soil mass

A

Porosity

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3
Q

The ratio between the weight of water and the weight of solid particles

A

Moisture content

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4
Q

The shear strength of the soil is________

A

Increases with increase in normal stress

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5
Q

What is the ratio of weight of water to the weight of solid particles

A

Water content

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6
Q

In AASHTO soil is greater than 75 mm is classified as

A

Cobbles

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7
Q

The intensity of vertical stress at a depth due to point load acting on the surface of a semi infinite elastic soil mass is

A

Directly proportional to the square of the depth

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8
Q

When the metacenter of a floating body is lower than center of gravity then the body will be in ________

A

Unstable equilibrium

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9
Q

The metacentric height is the distance between the___________

A

Center of the gravity of the floating body and the metacenter

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10
Q

Specific weight of liquid_________

A

Does not vary on any other planet

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11
Q

In civil engineering soil is__________

A

Unsemented aggregate

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12
Q

This first type of soil structure is an arrangement comprising particles having

A. Face to face or parallel orientation
B. Edge to edge orientation
C. Edge to face orientation
D. All of the above

A

A. Face to face or parallel orientation

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13
Q

The soil moisture driven off by heat is called

A

Hydroscopic water

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14
Q

Residual soils are formed by
A. Glaciers
B. Wind
C. Water
D. None of the above

A

D.

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15
Q

“Talus” is the soil transported by
A. Wind
B. Water
C. Glacier
D. Gravitational force

A

D

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16
Q

“Drift” is the material pick up, mixed, disintegrated, transported, and redeposited by

A

Glaciated water

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17
Q

“Loess” is silty clay formed by the action of

A

Wind

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18
Q

Pick up the correct statement from the following:
A. The rise of the ground surface due to frost action is called frost heave
B. The freezing of water is accompanied by a volume increase of 9%
C. Willow freezing point higher soil suction develops
D. All of the above

A

D

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19
Q

Transporting and redepositing soil is done by
A. Water
B. Glacier
C. Gravity
D. All of the above

A

D

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20
Q

Chemical weathering of soil is caused due to

A. Oxidation
B. Carbonation
C. Hydration
D. All of the above

A

D

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21
Q

Which of the following types of soil is transported by gravitational forces
A. Loess
B. Talus
C. Drift
D. Dune sand

A

B.

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22
Q

Pick up the correct statement from the following:
A. Soil is the substance existing on the earth’s surface which grows and develops plant
B. Soil is the material in a relatively thin surface zone within which roots occur and rest of the crust is termed as rock irrespective of
hardness
C. Soil is the unaggregated and unsemented deposits of minerals and organic particles covering the earth’s crust
D. All of the above

A

D

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23
Q

Geologic cycle for the formation of soil is

A

Weathering > Transportation > Deposition > Upheaval

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24
Q

The inventor of the term soil mechanic was
A. Cairo polycarpio
B. Dr. Carl Terzaghi
C. Leygue
D. Fellenius

A

B

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25
Q

Water formed transported soil is
A. Alluvial
B. Marine
C. Lacustrine
D. Loess

A

A

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26
Q

The ratio of volume of air voids to the volume of total voids is known as

A. Air content
B. Percentage of voids
C. Percentage of air voids
D. Porosity

A

Air content

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27
Q

When the sea page pressure becomes equal to the pressure due to the submerged weight of the soil the effective pressure is reduced to zero and 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. Quicksand
D.All of the above

A

D

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28
Q

Buoyant unit weight equals the saturated density
A. Multiplied by unit weight of water
B. Divided by by unit weight of water
C. Plus unit weight of water
D. Minus unit weight of water

A

D

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29
Q

You are given a sample of soil containing coarse grain to determine its water content you will use

A. Pycnometer
B. Oven drying method
C. Calcium carbide method
D. Alcohol method

A

A

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30
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

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31
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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32
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

Ic= (G-1)/(1+e)

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33
Q

The fundamental relationship between dry density (yd), bulk density (y) and water content (w) is

A. y= yd/(1+w)
B. yd= y/(1+w)
C. w= y/(1+yd)
D. w= y/(1-yd)

A

B

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34
Q

Pick up the correct statement from the following:
A. The void ratio in soils is defined as the ratio of the volume of voice to the volume of solids
B. The bulk density of a soil is defined as a unit weight of the soil
C. The dry density of a soil is defined as weight of solid to the total volume of soil
D. All of the above

A

All of the above

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35
Q

The weight of a container is w1 and the weight of the 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) x100
D. (W2-W1)/ (W1-W3) x 100

A

A

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36
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

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37
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

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38
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

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39
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

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40
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 of the above

A

D.

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41
Q

Specific gravity of sand

A

2.6

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42
Q

Pick up the correct statement from the following
A. The dry density reduces by addition of water after attaining optimum moisture content
B. The line joining the peak of three moisture content drops obtained by using three compactive energies is called line of optimus
C. Well graded course grained soils can be compacted to a very high density as compared to fine grained soils
D. All of the above

A

D.

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43
Q

Which of the following statements is correct
A. Uniformity coefficient represents the shape of the particle size distribution curve
B. For a well graded soil both uniformity coefficient and coefficient of curvature are nearly unity
C. A soil is said to be well graded if it has most of the particles of about the same size
D. None of the above

A

D

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44
Q

Hydrometer readings are corrected for
A. Temperature
B. Meniscus correction
C. Dispersing agent correction
D. Temperature meniscus and dispersing agent corrections

A

D.

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45
Q

The ratio of the difference between the void ratio of the soil in its loses state and its natural void ratio to the difference between the void ratios is the loosest and fully dense state is generally termed as

A. Degree of density
B. Relativity
C. Density index
D. All of the above

A

D

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46
Q

With the increases in the amount of compaction energy

A. Optimum water content increases but maximum the red density decreases
B. Both optimum water content and maximum dry density increases
C. Optimum water content decreases but maximum dry density increases
D., both optimum water content and maximum dry density decreases

A

C

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47
Q

Pick up the correct statement from the following

A. a maximum value of dry density is obtained at optimum water content
B. At low value of water content most soils tends to be stiff
C. At high water content the dry density decreases with an increases of water content
D. All of the above

A

D

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48
Q

The density of soil can be increased
A. Mary juicing the space occupied
B. The elastic compression of soil greens
C. By expelling water from pores
D. All of the above

A

D,

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49
Q

Activity= Ac<0.7 what classification is this?

A. Inactive Clay
B. Normal Clay
C. Active Clay
D. None of the Above

A

A

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50
Q

Activity : 0.7< Ac < 1.2

A. Inactive Clay
B. Normal Clay
C. Active Clay
D. None of the Above

A

B

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51
Q

Activity: Ac> 12

A. Inactive Clay
B. Normal Clay
C. Active Clay
D. None of the Above

A

C

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52
Q

LI <0

A. Semi Soild State
B. Plastic State
C. Liquid State
D. None of the above

A

A

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53
Q

0<LI <1

A. Semi Soild State
B. Plastic State
C. Liquid State
D. None of the above

A

B

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54
Q

LI >1

A. Semi Soild State
B. Plastic State
C. Liquid State
D. None of the above

A

C

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55
Q

Plastic Index = 0

A.non-plastic
B. Slightly plastic
C. Low plasticity
D. Medium plasticity

A

A

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56
Q

Plastic index equals to 1-5
A.non-plastic
B. Slightly plastic
C. Low plasticity
D. Medium plasticity

A

B

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57
Q

Plastic index = 5- 10
A.non-plastic
B. Slightly plastic
C. Low plasticity
D. Medium plasticity

A

C

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58
Q

Classic index = 10 to 20

A.non-plastic
B. Slightly plastic
C. Low plasticity
D. Medium plasticity

A

D.

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59
Q

Plastic index equals to 20 to 40
A. Medium plasticity
B. High plasticity
C. Very high plasticity
D. Non-plastic

A

B

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60
Q

> 40
A. Medium plasticity
B. High plasticity
C. Very high plasticity
D. Non-plastic

A

C

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61
Q

The water content corresponding to a con penetration of ________defines the liquid limit

A

20mm

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62
Q

Offer more accurate method of determining both the liquid limit and the plastic limit

A

Fall cone test

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63
Q

Which of the following statement is correct?

A. Uniformity coefficient represents the shape of the particle size distribution curve
B. For a well graded soil both uniformity coefficient and coefficient of curvature are nearly unity
C. A soil is said to be well graded if it has most of the particles of about the same size
D. None of the above

A

D

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64
Q

The hydrometer readings are corrected for:
A. Temperature correction
B. Meniscus correction
C. Dispersing agent correction
D. Temperature, meniscus and dispersing agent correction

A

D

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65
Q

The ratio of the difference between the void ratio of the soil in its loses state and its natural void ratio to the difference between the void ratios in the loses and fully dense state is generally termed as

A. Degree of density
B. Relativity
C. Density index
D. All Of the above

A

D

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66
Q

With the INCREASE in the amount of COMPACTION ENERGY

A. Optimum water content increases but maximum dry density decreases
B. Optimum water content decreases but maximum dry density increases
C. Both optimum water content and maximum dry density increases
D. Both optimum water content and maximum dry density decreases

A

B

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67
Q

Pick up the correct statement from the following

A. A maximum value of dry density is obtained at optimum water content
B. At low value of water content most soils tend to be stiff
C. At high water content the dry density decreases with an increase of water content
D. All of the above

A

D

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68
Q

The density of the soil can be increased
A. By reducing the space occupied by air
B. By elastic compression of soil grains
C. By expelling water from pores
D. All of the above

A

D

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69
Q

Compression of soil occurs rapidly if voids are filled with
A. Water
B. Air
C. Partly with air and partly with water
D. None of these

A

B

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70
Q

Select the correct statement
A. A uniform soil has more strength and stability than a non-uniform soil
B. A uniform soil has less strength and stability than a non uniform soil
C. Uniformity coefficient does not affect strength and stability
D. Uniformity coefficient of a poorly graded soil is more than that a well graded soil

A

B

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71
Q

For BETTER STRENGTH and STABILITY the fine grained soils and coarse grained soils are compacted respectively as
A. Dry of OMC and wet of OMC
B. WET of OMC and dry of OMC
C. wet of OMC and wet of OMC
D. Dry of OMC and dryof OMC

A

B

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72
Q

Which of the following is a measure of PARTICLES SIZE RANGE

A. Effective size
B. Uniformity coefficient
C. Coefficient of curvature
D. None of these

A

B

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73
Q

Select the correct range of density index, ID

A. ID> 0
B. ID <0
C. 0< ID < 1
D. 0<ID<1

A

D

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74
Q

The ratio of e- maximum and e- minimum of silty sand is

A. 2.0
B. 2.5
C. 3.0
D. 3.5

A

C

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75
Q

Maximum dry density up to which any soil can be compacted depends upon

A. Moisture content only
B. Amount of compaction energy only
C. Both moisture content and amount of compaction energy
D. None of these

A

C

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76
Q

Pick up the incorrect statement from the following

A. Compaction has no effect on the structures of the soil
B. Permeability decreases with increase in the dry density of a compacted soil
C. A wet side compacted soil is more compressible than a dry side compacted soil
D. Dry side compaction soils swell more when given access to moisture

A

A

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77
Q

The COEFFICIENT OF CURVATURE for a well graded soil must be between

A. 0.5 to 1
B. 1.0 to 3.0
C. 3.0 to 4.0
D. 4.0 to 5.0

A

B

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78
Q

The COEFFICIENT OF CURVATURE is defined

A. D60/D10
B. D10/D60
C. D30^2/D60D10
D. D10^2/D30D50

A

C

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79
Q

Pick up the correct statement from the following
A. Omc refers to the moisture the corresponding to the maximum point on the moisture content dry density curve
B. The line which shows moisture content dry density relation for soil containing a constant percentage of air voids and is known as air void line
C. The free fall of hammer for compaction is 30.5
D. All of the above

A

D

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80
Q

If the sand IN-SITU IS IN ITS DENSEST STATE then the relative density of sand is

A. 0
B.1
C. Between 0 and 1
D. Greater than 1

A

B

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81
Q

Factor which affects the compaction is
A. Moisture content
B. Compacting content
C. Method Of compaction
D. All of the above

A

D

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82
Q

The effective size of particles of soil is donated by

A

D10

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83
Q

Uniformity coefficient of a soil is

A. Always less than one
B. Always equal to one
C. Equal to or less than one
D. Equal to or greater than one

A

D

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84
Q

RELATIVE DENSITY of a COMPACTED DENSE SAND is approximately equal to
A. 0.4
B. 0.6
C. 0.95
D. 1.20

A

C

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85
Q

Coarse grain soils are best compacted by a

A. Drum roller
B. Rubber tired roller
C. Sheeps foot roller
D. Vibratory roller

A

D

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86
Q

If the material of the base of the casa grande liquid limit device on which the cap containing soil paste drop is softer than the standard hard rubber, then

A. The liquid limit of soil always increases
B. The liquid limit of soil always decreases
C. The liquid limit of soil may increase
D. The liquid limit of soil may decrease

A

A

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87
Q

The water content in a soil sample when IT CONTINUES TO LOSE WEIGHT WITHOUT LOSING THE VOLUME it’s called

A. Shrinkage limit
B. Plastic limit
C. Liquid limit
D. Semi solid limit

A

A

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88
Q

Pick up the incorrect definition from the following
A. Ratio of the compressive strength of an confined undisturbed soil to that of remolded soil is known as the sensitivity of the soil sample
B. The rotation of soil particles into a stable state while removing is known as the thiostropy soil
C. The water content at which a soil flows is known plastic limit of the soil
D. None of the above

A

D

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89
Q

Pick up the correct statement from the following
A. The range of water content between the liquid limit and plastic limit is called plasticity index
B. The ratio of the liquid limit minus the natural water content to the plasticity index of soil is called consistency index
C. The ratio of natural water content minus its plastic limit to its plasticity index is called liquidity index
D. All of the above

A

D

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90
Q

The range of water content between the liquid limit and classic limit

A. Plastic limit
B. Plasticity index
C. Consistency index
D. Liquidity index

A

B

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91
Q

The ratio of liquid limit minus the natural water content to the plasticity index of soil
A. Plastic limit
B. Plasticity index
C. Consistency index
D. Liquidity index

A

C

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92
Q

The ratio of natural water content minus its plastic limit to its plasticity index

A. Plastic limit
B. Plasticity index
C. Consistency index
D. Liquidity index

A

D

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93
Q

If the natural water content of soil mass lies between its liquid limit and plastic limit the soil mass is said to be in

A. Liquid state
B. plastic state
C. Semi solid state
D. Solid state

A

B

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94
Q

Compression of soil occurs rapidly if voids are filled with

A. Air
B.Water
C. Partly with air and partly with water
D. None of the above

A

A

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95
Q

Select the correct statement

A. A uniform soil has more strength and stability than a non-uniform soil
B. A uniform soil has less strength and stability than a non-uniform soil
C. Uniformity coefficient does not affect strength and stability
D. Uniformity coefficient of a poorly graded soil is more than that of a well graded soil

A

B

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96
Q

For BETTER STRENGTH AND STABILITY, the fine grain soils and coarse grained soils are compacted respectively as

A. dry of omc and wet of omc
B. Wet of omc and dry of omc
C. Wet of omc and wet of omc
D. Dry of omc and dry of om c

A

B

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97
Q

If the material of the base of the casa grande liquid limit device on which the cup containing soil paste drops in softer than the standard hard rubber then

A. The liquid limit of soil always increases
B. The liquid limit of soil always decreases
C. The liquid limit of soil may increase
D. The liquid limit of soil may decrease

A

A

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98
Q

The water content in a soil sample with it continues to lose weight without losing the volume is called

A.Shrinkage limit
B. Plastic limit
C. Liquid limit
D. Semi solid limit

A

A

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99
Q

The plasticity of fine soils may be assessed by means of

A. Dry strength test
B. Toughness test
C. Delatancy test
D. All of the above

A

D

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100
Q

Pick up the following statement from the following

A. In soils the flow index indicates variation in shear strength with water content
B. Liquid limit minus plastic limit is known as plasticity index of the soil
C. Plastic limit minus shrinkage limit is known as shrinkage index of the soil
D. All of the above

A

D

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101
Q

The water content of soil which represents the boundary between the plastic state and liquid state is known as

A. Liquid limit
B. Plastic limit
C. Shrinkage limit
D. Plasticity index

A

A

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102
Q

The property of a soil which allows it to be deformed rapidly with the structure elastic ribbon and also a volume change is known as

A. Porosity
B. Plasticity
C. Permeability
D. Ductility

A

B

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103
Q

The water content of soil which represents the boundary between the plastic state and liquid state is known as

A. Liquid limit
B. Plastic limit
C. Shrinkage limit
D. Plasticity index

A

A

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104
Q

The consistency index of a soil is defined as the ratio of

A. Liquid limit plus the natural water content to the plasticity index of the soil
B. Liquid limit minus the natural water content to the plasticity index of the soil
C. Natural water content of a soil minus plastic limit to the plasticity index of the soil
D. Natural water content of a soil plus its plastic limit to the plasticity index of the soil

A

B

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105
Q

Plasticity index is defined as the range of water content between

A. Liquid and plastic limit
B. Plastic limit and semi solid limit
C. Semi solid limit and liquid limit
D. Liquid limit and solid limit

A

A

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106
Q

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

A.n decrease in liquid limit and increase in plasticity index
B. Decrease in liquid limit and no change in plasticity index
C. Decrease in both liquid limit and plasticity index
D. Increase in both liquid limit and plasticity index

A

C

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107
Q

When the plastic limit of a soil is greater than the liquid limit then the plasticity index is reported as

A. Negative
B. 0
C. Non-plastic
D. One

A

B

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108
Q

Inorganic soils with low compressibility represented by

A. MH
B. SL
C. ML
D. CH

A

C

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109
Q

The liquid limit and plastic limit exist in
A. Sandy soil
B. Silty soil
C. Gravel soils
D. Clay soils

A

D

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110
Q

The minimum water content at which the soil just begins to crumble when rolled into threads 3 mm in diameter is known

A. Liquid limit
B. Plastic limit
C. Shrinkage limit
D. Permeability limit

A

B

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111
Q

The liquidity index is defined as a ratio express as percentage of
A. Plastic limit minus the natural water content to its plasticity index
B. Natural water content minus its plastic limit to its plasticity index
C. National water content plus its plastic limit to its plasticity index
D. Liquid limit minus the natural water content to the plasticity index

A

B

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112
Q

The minimum water content at which the soil retrains its liquid state and also possesses a small shearing strength against flowing is known

A. Liquid limit
B. Plastic limit
C. Shrinkage limit
D. Permeability limit

A

A

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113
Q

The plasticity index is the numerical difference between

A. Liquid limit and plastic limit
B. Plastic limit and shrinkage limit
C. Liquid limit and shrinkage limit
D. None of the above

A

A

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114
Q

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

A. Liquid state
B. Plastic state
C. Semi solid state
D. All of the above

A

D

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115
Q

Toughness index is defined as the ratio of

A. Plasticity index to consistency index
B. Plasticity index to flow index
C. Liquidity index to flow index
D. Consistency index to liquidity index

A

C

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116
Q

The maximum water content at which a reduction in water content does not cause a decrease in volume of a soil mass is known

A. Liquid limit
B. Plastic limit
C. Shrinkage limit
D. Permeability limit

A

C

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117
Q

If the plasticity index of a soil mass is zero the soil is

A. Sand
B. Silt
C. Clay
D. Clayey Silt

A

A

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118
Q

According to the athenberg the soil is said to be of medium plasticity if the plasticity index is

A. 0<PI<7
B. 7<PI <17
C. 17< PI <27
D. PI>27

A

B

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119
Q

Which of the following soils has more plasticity index

A. Sand
B. Silt
C. Clay
D. Gravel

A

C

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120
Q

For general engineering purposes soils are classified by

A. Particle size classification system
B. Textural classification system
C. AASHTO
D. Unified soil classification system

A

D

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121
Q

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 direction
D. Parallel to stratification may or may not be greater than the perpendicular to stratification

A

A

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122
Q

Soils containing organic matter

A. Swell with decrease of moisture
B. Are of spongy’s nature
C. shrink with increase of moisture content
D. None of these

A

B

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123
Q

Physical properties of a permeant which influence permeability are

A. Viscosity only
B. Unit weight only
C. Both viscosity and unit weight
D. None of the above

A

C

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124
Q

Soil classification of composite soils exclusively based on the particle size distribution is known

A. Particle classification
B. Textural classification
C. AASHTO classification
D. Unified soil classification

A

B

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125
Q

Coefficient of permeability of soil

A. Does not depend upon temperature
B. Increase with the increase in temperature
C. Increase with the decrease in temperature
D. None of the above

A

B

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126
Q

Maximum size of clay particles

A. 0.002
B. 0.004
C. 0.06
D. 0.08

A

A

127
Q

During sea page through a soil direction of sea page is always

A. Parallel to equipotential lines
B. Perpendicular to streamlines
C. Perpendicular to equipotential lines
D. None of these

A

C

128
Q

Pick up the correct statement from the following
A. The subject of classifying soil is to arrange them into groups according to their properties and behaviors
B. A soil classification system is meant to provide an accepted and systematic method of describing the various type of soils eliminating personal factors
C. The first category of soil classification is based on grain size of the soil
D. All of the above

A

D.

129
Q

The sea page force in a soil is

A. Perpendicular to the equipotential lines
B. Proportional to the exit gradient
C. Proportional to the head loss
D. All of the above

A

D.

130
Q

Stroke law is valid only if the size of particle is

A. Less than 0.002 mm
B. Greater than 0.2 mm
C. Between 0.2 mm and 0.0002 mm
D. All of the above

A

C

131
Q

The soil which contains finest grain particles is

A. Corse sand
B. Fine sand
C. Silt
D. Clay

A

D

132
Q

Pick up the correct statement from the following

A. The permeability of the coarse grained soils may be reduced by grouting
B. The process of injecting fluids into the four space of the soil is called grouting
C. The grouting increases the soil strength
D. All of the above

A

D

133
Q

AASHTO classification of soils is

A. Particle size composition
B. Plasticity characteristics
C. Both particle size composition and plasticity characteristics
D. None of the above

A

C

134
Q

Select the correct statement
A. The greater the viscosity the greater the permeability
B. The greater the unit weight the greater the permeability
C. The greater the unit weight the smaller the permeability
D. Unit weight does not affect permeability

A

B

135
Q

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 and b
D. Both a and b

A

D

136
Q

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

A. Constant head method
B. Falling head method
C. Both the above
D. None of the above

A

A.

137
Q

The critical exist gradient of sea page 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

A

D

138
Q

There is no impervious boundary at the bottom of a hydraulic structure stream lines tend to follow

A. A straight line
B. Parabola
C. A semi ellipse
D. Semicircle

A

C

139
Q

Flow net is used for determination of

A. Quantity of sea page
B. Hydrostatic pressure
C. Seepage pressure
D. All of the above

A

D

140
Q

A stokes law states that the velocity at which green settles out of suspension the other factors remaining constant is dependent upon

A. Shape of grain
B. Weight of grain
C. Size of grain
D. Shape, size and weight of grain

A

D

141
Q

The phreatic line in an earth dam may be

A. Circular
B. Elliptical
C. Parabolic
D. A straight line

A

C

142
Q

Stokes law does not hold good if the size of the partcle is smaller than

A. 0.0002
B. 0.002
C. 0.02
D. 0.2

A

A

143
Q

In flow net

A. A flow lines and equipotential lines cross each other at right angles
B. Fields are rectangles whose length is twice the bredth
C. Smaller the dimensions of the field smaller will be the hydraulic gradient and velocity of flow through it
D. For homogeneous soil the curves are smooth and circular

A

A.

144
Q

Quicksand is a
A. Type of a sand
B. Flow condition occurring in cohesive soils
C. Flow condition occurring in cohesionless soil
D. Flow condition occurring in both cohesive and cohesionless soil

A

C

145
Q

Which of the following methods is more suitable for the determination of permeability of clay soil

A. Constant head method
B. Falling head method
C. Horizontal permeability test
D.none of these

A

B

146
Q

For general engineering purposes, soils are classified by

A. Particle size classification system
B. Textural classification system
C. AASHTO
D. Unified soil classification system

A

Unified soil classification system

147
Q

Soils containing organic matters

A. Are of spongy nature
B. Swell with decrease of moisture
C. Shrink with increase of moisture content
D. None of these

A

Are of spongy nature

148
Q

Soil classification of composite soils, exclusively based on the particle size distribution, is known

A. Particle classification
B. Textural classification
C. AASHTO classification
D. Unified soil classification

A

Textural classification

149
Q

Maximum size of clay particle is

A. 0.002 mm
B. 0.04 mm
C. 0.06 mm
D. 0.08 mm

A

0.002 mm

150
Q

Pick up the correct statement from the following

A. The object of classifying soils is to arrange them into groups according to their properties and behaviour
B. A soil classification system is meant to provide an accepted and systematic method of describing the various types of soils eliminating personal factors
C. The first category of soil classification is based on grain size of the soil
D. All of the above

A

All of the above

151
Q

The soil which contains finest grain particles, is

A. Coarse sand
B. Fine sand
C. Silt
D. Clay

A

Clay

152
Q

Minimum size of the particles of silt soil, is

A. 0.002 mm
B. 0.04 mm
C. 0.06 mm
D. 0.08 mm

A

0.002 mm

153
Q

AASHTO classification of soils is based on

A. Particle size composition
B. Plasticity characteristics
C. Both particle size composition and plasticity characteristics
D. None of the above

A

Both particle size composition and plasticity characteristics

154
Q

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

A

Parallel to stratification is always greater than that perpendicular to stratification

155
Q

Physical properties of a permeant which influence permeability are

A. Viscosity only
B. Unit weight only
C. Both viscosity and unit weight
D. None of the above

A

Both viscosity and unit weight

156
Q

Coefficient of permeability of soil

A. Does not depend upon temperature
B. Increases with the increase in temperature
C. Increases with the decrease in temperature
D. None of the above

A

Increases with the increase in temperature

157
Q

During seepage through a soil, direction of seepage is always

A. Parallel to equipotential lines
B. Perpendicular to stream lines
C. Perpendicular to equipotential lines
D. None of these

A

Perpendicular to equipotential lines

158
Q

The seepage force in a soil, is

A. Perpendicular to the equipotential line
B. Proportional to the exit gradient
C. Proportional to the head loss
D. All of the above

A

All of the above

159
Q

Stoke’s law is valid only if the size of particle is

A. Less than 0.0002 mm
B. Greater than 0.2 mm
C. Between 0.2 mm and 0.0002 mm
D. All of the above

A

Between 0.2 mm and 0.0002 mm

160
Q

Pick up the correct statement from the following:

A. The permeability of the coarse-grained soils may be reduced by grouting
B. The process of injecting fluids (i.e. grouts) into the pores space of the soil is called grouting
C. The grouting increases the soil strength
D. All of the above

A

All of the above

161
Q

Select the correct statement

A. The greater the viscosity, the greater is permeability
B. The greater the unit weight, the greater is permeability
C. The greater the unit weight, the smaller is permeability
D. Unit weight does not affect permeability

A

The greater the unit weight, the greater is permeability

162
Q

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

A

Both A and B

163
Q

The critical exist 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

A

Both A and C

164
Q

Stoke’s law states that the velocity at which a grain settles out of suspension, the other factors remaining constant, is dependent upon

A. Shape of grain
B. Weight of grain
C. Size of grain
D. Shape, size and weight of grain

A

Shape, size and weight of grain

165
Q

The phreatic line in an earth dam may be

A. Circular
B. Elliptical
C. Parabolic
D. A straight line

A

Parabolic

166
Q

In a flow net

A. Flow lines and equipotential lines cross each other at right angles
B. Fields are rectangles whose length is twice the breadth
C. Smaller the dimensions of the field, smaller will be the hydraulic gradient and velocity of flow through it
D. For homogenous soil, the curves are smooth and circular

A

Flow lines and equipotential line cross each other at right angles

167
Q

Which of the following methods is more suitable for the determination of permeability of clayey soil?

A. Constant head method
B. Falling head method
C. Horizontal permeability test
D. None of the above

A

Falling head method

168
Q

A critical hydraulic gradient may occur when

A. Flow is in upward direction
B. Seepage pressure is in upward direction
C. Effective pressure is zero
D. All of the above

A

All of the above

169
Q

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

A. Constant head method
B. Falling head method
C. Both of the above
D. None of the above

A

Constant head method

170
Q

If there is no impervious boundary at the bottom of a hydraulic structure, stream lines tend to follow:

A. A straight line
B. A parabola
C. A semi-ellipse
D. A semi-circle

A

A semi-ellipse

171
Q

Flow net is used for the determination of

A. Quantity of seepage
B. Hydrostatic pressure
C. Seepage pressure
D. All of the above

A

All of the above

172
Q

Stoke’s law does not hold good if the size of particle is smaller than

A. 0.0002 mm
B. 0.002 mm
C. 0.02 mm
D. 0.2 mm

A

0.0002 mm

173
Q

Quick sand is a

A. Type of sand
B. Flow condition occurring in cohesive soils
C. Flow condition occurring in cohesionless soils
D. Flow condition occurring in both cohesive and cohesionless soils

A

Flow condition occurring in cohesionless soils

174
Q

The total discharge from two wells situated near to each other is

A. Sum of the discharges from individual wells
B. Less than the sum of the discharges from individual wells
C. Greater than the sum of the discharges from individual wells
D. Equal to larger of the two discharges from individual wells

A

Less than the sum of the discharges from individual wells

175
Q

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

A. Moisture content
B. Permeability
C. Capillarity
D. None of these

A

Permeability

176
Q

The critical exist gradient of seepage water in soils, is

A. Directly proportional to the voids ratio
B. Inversely proportional to the specific gravity
C. Directly proportional to the specific gravity
D. None of these

A

Directly proportional to the specific gravity

177
Q

Darcy’s law is applicable to seepage if a soil is

A. Homogenous
B. Isotropic
C. Incompressible
D. All of the above

A

All of the above

178
Q

Pick up the correct statement from the following:

A. The phenomenon of quicksand generally occurs in the cohesionless soil
B. At critical hydraulic gradient, the saturated sand becomes quick
C. The critical gradient depends on the void ratio and the specific gravity
D. All of the above

A

All of the above

179
Q

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

A

Equal increase in pore water pressure and total stress

180
Q

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

A

Decreases both voids ratio and permeability

181
Q

The neutral stress in a soil mass is

A. Force per neutral area
B. Force per effective area
C. Stress taken up by the pore water
D. Stress taken up by solid particles

A

Stress taken up by the pore water

182
Q

A flow net may be utilized for the determination of

A. Exit gradient
B. Seepage
C. Hydrostatic pressure
D. All of the above

A

All of the above

183
Q

Pick up the correct statement from the following:

A. When stress decreases, void, ratio decreases
B. When stress decreases, coefficient of permeability decreases
C. When stress decreases, coefficient of volume change decreases
D. When stress decreases void ratio, coefficient of permeability and volume change decrease

A

When stress decreases, void ratio, coefficient of permeability, and volume change decrease

184
Q

Effective stress is

A. The stress at particles contact
B. A physical parameter that can be measured
C. Important because it is a function of engineering properties of soil
D. All of the above

A

Important because it is a function of engineering properties of soil

185
Q

The pressure the builds up in pore water due to load increment on the soil, is termed

A. Excess pore pressure
B. Excess hydrostatic pressure
C. Hydrodynamic pressure
D. All of the above

A

All of the above

186
Q

A phreatic line is defined as the line within the dam section below which there are

A. Positive equipotential lines
B. Positive hydrostatic pressure
C. Negative hydrostatic pressure
D. Negative equipotential lines

A

Positive hydrostatic pressure

187
Q

The ultimate consolidation settlement of a soil is

A. Directly proportional to the voids ratio
B. Directly proportional to the compression index
C. Inversely proportional to the compression index
D. None of the above

A

Directly proportional to the compression index

188
Q

The capillary rise of water

A. Depends upon the force responsible
B. Increases as the size of the soil particle increases
C. Decreases as the size of the soil particle decreases
D. Is less in wet soil than in dry soil

A

Depends upon the force responsible

189
Q

The Westgard analysis is used for

A. Sandy soils
B. Cohesive soils
C. Stratified soils
D. Clayey soils

A

Stratified soils

190
Q

The ultimate consolidation settlement of a structure resting on a soil

A. Decreases with the increase in the initial voids ratio
B. Decreases with the decrease in the plastic limit
C. Increases with the increase in the initial voids ratio
D. Increases with the decrease in the porosity of the soil

A

Decreases with the increase in the initial voids ratio

191
Q

The coefficient of compressibility of soil, is the ratio of

A. Stress to strain
B. Strain to stress
C. Stress to settlement
D. Rate of loading to that of settlement

A

Strain to stress

192
Q

A clay subjected to pressure in excess to its present over-burden, is said to be

A. Pre-compressed
B. Pre-consolidated
C. Over-consolidated
D. All of the above

A

All of the above

193
Q

Which one of the following clays behaves like a dense sand?

A. Over-consolidated clay with a high over-consolidation ratio
B. Over-consolidated clay with a low over-consolidation ratio
C. Normally consolidated clay
D. Under-consolidated clay

A

Over-consolidated clay with a high over-consolidation ratio

194
Q

The compression index of a soil

A. Decreases with an increase in the liquid limit
B. Increases with an increase in the liquid limit
C. Decreases with an increase in the plastic limit
D. Is not related with plastic limit

A

Increases with an increase in the liquid limit

195
Q

Sensitivity of a soil can be defined as

A. Percentage of volume change of soil under saturated condition
B. Ratio of compressive strength of unconfined undistributed soil to that of soil in a remoulded state
C. Ratio of volume of voids to volume of solids
D. None of the above

A

Ratio of compressive strength of unconfined undistributed soil to that of soil in a remoulded state

196
Q

The reduction in volume of soil due to squeezing out of water from the voids, is termed

A. Primary consolidation
B. Primary compression
C. Primary time effect
D. All of the above

A

All of the above

196
Q

A soil not fully consolidated under the existing over-burden pressure, is called

A. Pre-consolidated
B. Normally consolidated
C. Over-consolidated
D. None of these

A

Over-consolidated

197
Q

If a soil undergoes a change in shape and volume by application of external loads over it, but recovers its shape and volume immediately after removal of the load, the property of the soil is said to be

A. Resilience of soils
B. Elasticity of soils
C. Compressibility of soils
D. None of these

A

Elasticity of soils

198
Q

Coefficient of compressibility is

A. Constant for any type of soil
B. Different for different types of soils and also different for a soil under different states of consolidation
C. Different for different types of soils but same for a soil under different states of consolidation
D. Independent type of soil but depends on the stress history of soil

A

Different for different types of soils and also different for a soil under different states of consolidation

199
Q

Select the correct statement

A. Coefficient of compressibility of an over-consolidated clay is less than that of a normally consolidated clay
B. Coefficient of compressibility of an over-consolidated clay is greater than that of a normally consolidated clay
C. Coefficient of compressibility is constant for any clay
D. None of the above

A

Coefficient of compressibility of an over-consolidated clay is less than that of a normally consolidated clay

200
Q

Over-consolidation of soils is caused due to

A. Erosion of over burden
B. Melting of ice sheets after glaciations
C. Permanent rise of water table
D. All of the above

A

All of the above

201
Q

The compressibility of clays is caused due to:

A. Expulsion of double layer water from in between the grains
B. Slipping of particles to new positions of greater density
C. Bending of particles as elastic sheets
D. All of the above

A

All of the above

202
Q

Compressibility of sandy soils is

A. Almost equal to that of clayey soils
B. Much greater than that of clayey soils
C. Much less than that of clayey soils
D. None of the above

A

Much less than that of clayey soils

203
Q

The maximum value of effective stress in the past divided by the present value is defined as over consolidation ratio (OCR). The O.C.R. of an over consolidated clay is

A. Less than 1
B. 1
C. More than 1
D. None of these

A

More than 1

204
Q

The ultimate Settlement of a soil is directly proportional to:

A. Depth of the compressible soil strata
B. Compressive index
C. Void ratio
D. Both A and B

A

Both A and B

205
Q

Terzaghi’s theory of one dimentional consolidation assumes:

A. Soil is homogenous and fully saturated
B. Water and soil particles are incompressible
C. Deformation of the soil, is entirely due to change in volume
D. All of the above

A

All of the above

206
Q

Pick up the correct statement from the following:

A. Coefficient of compressibility is the decrease in void ratio per unit increase of pressure
B. The percent settlement at any time is called degree of consolidation
C. Time factor is a dimensionless quantity
D. All of the above

A

All of the above

207
Q

Direct measurement of permeability of the specimen at any stage of loading can be made

A. Only in fixed ring type consolidometer
B. Only in floating ring type consolidometer
C. Both A and B
D. None of the above

A

Only in fixed ring type consolidometer

208
Q

Skempton’s pore pressure coefficient B for saturated soil is

A . 1
B. Zero
C. Between 0 and 1
D. Greater than 1

A

1

209
Q

Degree of consolidation is

A. Directly proportional to time and inversely proportional to drainage path
B. Directly proportional to time and inversely proportional to square of drainage path
C. Directly proportional to drainage path and inversely proportional to time
D. Directly proportional to square of drainage path and inversely proportional to time

A

Directly proportional to time and inversely proportional to square of drainage path

210
Q

Terzaghi’s theory of one dimensional consolidation assumes

A. Load is applied in one direction
B. Coefficient of permeability is constant
C. Excess pore water drains out only in the vertical direction
D. All of the above

A

All of the above

211
Q

The consolidation time for soils

A. Increases with increasing compressibility
B. Decreases with increasing permeability
C. Increases rapidly with increasing size of soil mass
D. All of the above

A

All of the above

212
Q

Within the consolidation process of a saturated clay

A. A gradual increase in neutral pressure and a gradual decrease in effective pressure take place and sum of the two is constant
B. A gradual decrease in neutral pressure and a gradual increase in effective pressure take place and sum of the two is constant
C. Both neutral pressure and effective pressure decrease
D. Both neutral pressure and effective pressure increase

A

A gradual decrease in neutral pressure and a gradual increase in effective pressure take place and sum of the two is constant

213
Q

Coefficient of consolidation for clays normally

A. Decreases with increase in liquid limit
B. Increases with increase in liquid limit
C. First increases and then decreases with increase in liquid limit
D. Remains constant at all liquid limits

A

Decreases with increase in liquid limit

214
Q

The ratio of settlement at any time “t” to the final settlement, is known as

A. Co-efficient of consolidation
B. Degree of consolidation
C. Consolidation index
D. Consolidation of undisturbed soil

A

Degree of consolidation

215
Q

Time factor for a clay layer is

A. A dimensional parameter
B. Directly proportional to permeability of soil
C. Inversely proportional to drainage path
D. Independent of thickness of clay layer

A

Directly proportional to permeability of soil

216
Q

Coefficient of consolidation of a soil is affected by

A. Compressibility
B. Permeability
C. Both compressibility and permeability
D. None of the above

A

Both compressibility and permeability

217
Q

The compression resulting from a long term static load and consequent escape of pore water, is known as

A. Compaction
B. Consolidation
C. Swelling
D. None of these

A

Consolidation

218
Q

A triaxial shear test is preferred to direct shear test, because:

A. It can be performed under all three drainage conditions with complete control
B. Precise measurement of pore pressure and change in volume during test, is not possible
C. Stress distribution on the failure plane, is not uniform
D. None of these

A

It can be performed under all three drainage conditions with complete control

219
Q

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

A

Decreases with decrease in normal stress

220
Q

Select the incorrect statement

A. In a direct shear box test, the plane of shear failure is predetermined
B. Better control is achieved on the drainage of the soil in a triaxial compression test
C. Stress distribution on the failure plane in the case of triaxial compression test is uniform
D. Unconfined compression test can be carried out on all types of soils

A

Unconfined compression test can be carried out on all types of soils

221
Q

The angle of internal friction, is least for

A. Angular-grained loose sand
B. Angular- graned dense sand
C. Round-grained loose sand
D. Clays

A

Clays

222
Q

For testing a saturated clay for shear strength, the test recommended, is

A. Direct shear test
B. Triaxial compression test
C. Unconfined compression test
D. All of the above

A

Unconfined compression test

223
Q

The triaxial apparatus is usually used for

A. Unconsolidated-undrained test
B. Consolidated-undrained test
C. Drained test
D. All of the above tests

A

All of the above tests

224
Q

Shear strength of a soil is a unique function of

A. Effective stress only
B. Total stress only
C. Both effective stress and total stress
D. None of the above

A

Effective stress only

225
Q

The angle that Coulomb’s failure envelope makes with the horizontal is called

A. Cohesion
B. Angle of internal friction
C. Angle of repose
D. None of the above

A

Angle of internal friction

226
Q

The angle between the directions of the failure and the major principal plane, is equal to

A. 90° + effective angle of shearing resistance
B. 90° + half of the angle of shearing resistance
C. 45° - half of the angle of shearing resistance
D. 45° + half of the angle of shearing resistance

A

45° + half of the angle of shearing resistance

227
Q

The angle of internal friction of clays, is usually

A. 0° to 5°
B. 5° to 20°
C. 20° to 30°
D. 30° to 45°

A

5° to 20°

228
Q

Failure of a slope occurs only when total shear force is

A. Equal to total shearing strength
B. Greater than total shearing strength
C. Less than total shearing strength
D. None of these

A

Greater than total shearing strength

229
Q

The angle of internal friction is maximum for

A. Angular-grained loose sand
B. Angular-grained dense sand
C. Round-grained dense sand
D. Round-grained loose sand

A

Angular-grained dense sand

230
Q

A direct shear test possesses the following disadvantage:

A. A relatively thin thickness of sample permits quick drainage
B. A relatively thin thickness of sample permits quick dissipation of pore pressure developed during the test
C. As the test progresses the area under shear, gradually changes
D. None of these

A

As the test progresses the area under shear, gradually changes

231
Q

Which of the following statements is true for Mohr-Coulomb envelope?

A. Coulomb suggests that the relationship between shear strength and normal stress, is adequately represented by the straight line
B. The generalised Mohr theory suggests that, though the shear stress depends on the normal stress, the relation is not linear
C. Coulomb and Mohr suggest that a definite relationship exists among the principal stress and the angle of internal friction
D. All of the above

A

All of the above

232
Q

If drainage is permitted throughout the test, during the application of both normal, and shear stresses so that full consolidation occurs and no excess pore pressure is set up at any stage of the test, is known as

A. Quick test
B. Drained test
C. Consolidated undrained test
D. None of these

A

Drained test

233
Q

The shear resistance of a soil is constituted basically of the following component

A. The frictional resistance to translocation between the individual soil particles at their contact point
B. To the structural relation to displacement of the soil because of the interlocking of the particles
C. Cohesion and adhesion between the surfaces of the soil particles
D. All of the above

A

All of the above

234
Q

Select the incorrect statement

A. Effective cohesion of a soil can never have a negative value
B. Effective angle of internal friction for coarse grained soils is rarely below 30°
C. Effective angle of internal friction for a soil increases as state of compactness increases
D. Effective angle of internal friction is a complicated function of mineralogy and clay size content

A

Effective cohesion of a soil can never have a negative value

235
Q

The Mohr’s straight theory is based on the following fact:

A. Material falls essentially by shear
B. Ultimate strength of the material is determined by the stress in the plane of slip
C. Failure criterion is independent of the intermediate principal stress
D. All of the above

A

All of the above

236
Q

Through a point in a loaded soil mass, there exists typical planes mutually orthogonal on which the stress is wholly normal and no shear stress acts, if is

A. 1
B. 2
C. 3
D. 4

A

3

237
Q

Pick up the correct statement from the following:

A. Failure plane carries maximum shear stress
B. Failure plane does not carry maximum shear stress
C. Failure plane carries shear stress equal to maximum shear stress
D. None of these

A

Failure plane does not carry maximum shear stress

238
Q

On wetting, cohesive soils,

A. Loose permeability
B. Gain shear strength
C. Loose elasticity
D. Decrease their shear strength

A

Decrease their shear strength

239
Q

Pick up the correct statement from the following

A. An unconfined compression test is a special case of triaxial compression test
B. An unconfined compression test is a special case of direct shear test
C. The confining pressure is maximum during an unconfined compression test
D. The cylindrical specimen of a soil is subjected to major principal stress till it falls due to shearing along the plane of the failure

A

An unconfined compression test is a special case of triaxial compression test

240
Q

The direct shear test suffers from the following disadvantage:

A. Drain condition cannot be controlled
B. Pore water pressure cannot be measured
C. Shear stress on the failure plane is not uniform
D. The area under the shear and vertical loads does not remain constant throughout the test
E. All are disadvantages of direct shear stress

A

All are disadvantages of direct shear stress

241
Q

The length / diameter ratio of cylindrical specimens used in triaxial test, is generally

A. 1
B. 1.5
C. 2
D. 2.5

A

2

242
Q

Pick up the correct statement from the following:

A. Isotropic consolidation of clay can be obtained in the triaxial apparatus under equal all-round pressure
B. If the present effective stress is the maximum to which the clay has ever been subjected, it is called normally consolidated clay
C. If the present effective stress in the past was more than present effective stress, it is called over-consolidated clay
D. All of the above

A

All of the above

243
Q

If the shearing stress is zero on two planes, then the angle between the two planes is

A. 45°
B. 90°
C. 135°
D. 225°

A

90°

244
Q

The internal molecular attraction of a soil, the cohesion

A. Decreases as the moisture content increases
B. Increases as the moisture content decreases
C. Is more in well compacted clays
D. Depends upon the external applied load

A

Is more in well compacted clays

245
Q

The shearing strength of a cohesion-less soil depends upon

A. Dry density
B. Rate of loading
C. Confining pressure
D. Nature of loading

A

Confining pressure

246
Q

If a cohesive soil specimen is subjected to a vertical compressive load, the inclination of the cracks to the horizontal is

A. 90°
B. 45°
C. 22.5°
D. 0°

A

45°

247
Q

The shear strength in plastic undrained clay, is due to

A. Inter-granular friction
B. Internal friction
C. Cohesion
D. None of these

A

None of these

248
Q

The vane shear test is used for the in-situ determination of the undrained strength of the intact fully saturated

A. Sands
B. Clays
C. Gravels
D. Highly organic soils

A

Clays

249
Q

Depending upon the properties of a material, the failure envelope may

A. Be either straight or curved
B. Pass through the origin of stress
C. Intersect the shear stress axis
D. All of the above

A

All of the above

250
Q

Through a point in a loaded soil, the principal stress is maximum on

A. Minor principal plane
B. Intermediate principal plane
C. Major principal plane
D. None of these

A

Major principal plane

251
Q

In a deposit of normally consolidated clay

A. Effective stress increases with depth but water content of soil and undrained strength decrease with depth
B. Effective stress and water content increase with depth but undrained strength decreases with depth
C. Effective stress and undrained strength increase with depth but water content decreases with depth
D. Effective stress, water content and undrained strength decrease with depth

A

Effective stress and undrained strength increase with depth but water content decreases with depth

252
Q

Cohesionless soil is

A. Sand
B. Silt
C. Clay
D. Clay and silt

A

Sand

253
Q

The shear strength of a soil

A. Increases with an increase in the normal stress
B. Is proportional to the cohesion of the soil
C. Is generally known as the strength of the soil
D. All of the above

A

All of the above

254
Q

Unconfined compressive strength test is

A. Undrained test
B. Drained test
C. Consolidated undrained test
D. Consolidated drained test

A

Undrained test

255
Q

For shear strength, triaxial shear test is suitable because

A. It can be performed under all three drainage conditions
B. Precise measurement of the pore pressure and volume change during the test is possible
C. Stress distribution on the failure plane, is uniform
D. All of the above

A

All of the above

256
Q

In a consolidated drained test on a normally consolidated clay, the volume of the soil sample during shear

A. Decreases
B. Increases
C. Remains unchanged
D. First increases and then decreases

A

Decreases

257
Q

At liquid limit, all soils possess

A. Same shear strength of a small magnitude
B. Same shear strength of large magnitude
C. Different shear strengths of small magnitude
D. Different shear strengths of large magnitude

A

Same shear strength of a small magnitude

258
Q

In the triaxial compression test, the application of additional axial stress (i.e. deviator stress) on the soil specimen produces shear stress on

A. Horizontal plane only
B. Vertical plane only
C. Both horizontal and vertical planes
D. All planes except horizontal and vertical planes

A

All planes except horizontal and vertical planes

259
Q

Pick up the correct statement from the following:

A. The property of a soil that enables it to become stiff in a relatively short time standing is called thixotropy
B. The ratio of shear strength in natural state to the remoulded shear strength under undrained conditions is called degree of sensitivity
C. The difference between the undisturbed shear strength and remoulded shear strength is known remoulding loss
D. All of the above

A

All of the above

260
Q

Select the incorrect statement

Effective angle of shearing resistance:

A. Increases as the size of particle increases
B. Increases as the soil gradiation improves
C. Is limited to a maximum value of 45°
D. Is rarely more than 30° for fine grained soil

A

Is limited to a maximum value of 45°

261
Q

In a triaxial compression test when drainage is allowed during the first stage (i.e. application of cell pressure) only and not during the second stage (i.e. application of deviator stress at constant cell pressure), the test is known as

A. Consolidated drain test
B. Consolidated undrained test
C. Unconsolidated drained test
D. Unconsolidated undrained test

A

Consolidated undrained test

262
Q

When drainage is not permitted under initially applied normal stress only and full primarily consolidation is allowed to take place, the test is known as

A. Quick test
B. Drained test
C. Consolidated undrained test
D. None of these

A

Consolidated undrained test

263
Q

The maximum shear stress occurs on the filament which makes an angle with the horizontal plane equal to

A. 30°
B. 45°
C. 60°
D. 90°

A

45°

264
Q

The major principal stress in an element of cohesion-less soil within the backfill of a retaining wall is:

A. Vertical if the soil is in an active state of plastic equilibrium
B. Vertical if the soil is in a passive state of plastic equilibrium
C. Inclined at 45° to the vertical plane
D. None of the above

A

Vertical if the soil is in an active state of plastic equilibrium

265
Q

Rankine’s theory of active earth assumes

A. Soil mass is homogenous, dry and cohesionless
B. Ground surface is a plane which may be horizontal or inclined
C. Back of the wall is vertical and smooth
D. All of the above

A

All of the above

266
Q

Pick up the correct definition from the following:

A. The lateral pressure exerted by the soil when the retaining wall moves away from the back fill, is generally known as active earth pressure of the soil
B. The lateral pressure exerted by the soil when the retaining wall moves towards the soil, is generally known as passive earth pressure of the soil
C. The lateral pressure exerted by the soil when the retaining wall has no movement relative to the back fill, is known as ‘earth pressure at rest of the soil
D. All of the above

A

All of the above

267
Q

In active state of plastic equilibrium in a non cohesive soil with horizontal ground surface

A. Major principal stress is horizontal
B. Minor principal stress is vertical
C. Major principal stress is vertical
D. Minor and major principal stresses are equally inclined to horizontal

A

Major principal stress is vertical

268
Q

If the back fill is having a uniform surcharge of intensity per unit area, the lateral pressure will be

A. q times the lateral pressure within the surface
B. 1/q times the lateral pressure within the surface
C. Equal to a fill of height Z equal to q/r, where r is the density of the backfill
D. None of these

A

Equal to a fill of height Z equal to q/r, where r is the density of the backfill

269
Q

Rankine’s theory of earth pressure assumes that the back of the wall is

A. Plane and smooth
B. Plane and rough
C. Vertical and smooth
D. Vertical and rough

A

Vertical and smooth

270
Q

According to Coulomb’s wedge theory, the active earth pressure slides the wedge

A. Down and outwards on a slip surface
B. Up and inwards on a slip surface
C. Horizontal upward and parallel to base
D. Horizontal inward and parallel to base

A

Down and outwards on a slip surface

271
Q

The effect of cohesion on a soil is to

A. Reduce both the active earth pressure intensity and passive earth pressure intensity
B. Increase both the active earth pressure intensity and passive earth pressure intensity
C. Reduce the active earth pressure intensity but to increase the passive earth pressure intensity
D. Increase the active earth pressure intensity but to reduce the passive earth pressure intensity

A

Reduce the active earth pressure intensity but to increase the passive earth pressure intensity

272
Q

A failure wedge develops if a retaining wall

A. Moves away from the backfill
B. Moves towards the backfill
C. Sinks downwards
D. Stresses equally by vertical and horizontal forces

A

Moves away from the backfill

273
Q

The total active earth pressure due to dry back fill with no surcharge, acts at H/3 above the base of the wall and is directly proportional to

A. H
B. √H
C. H^2
D. H^3

A

H^2

274
Q

Back fill with a sloping surface exerts a total active pressure Pa on the wall of height H and acts at

A. H/4 above the base parallel to base
B. H/2 above the base parallel to base
C. H/3 above the base parallel to base
D. H/5 above the base parallel to base

A

H/3 above the base parallel to base

275
Q

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

A

Greater than active earth pressure but less than passive earth pressure

276
Q

Coulomb’s wedge theory assumes that

A. Back fill is dry, cohesionless, homogenous and isotropic
B. Slip surface is the plane which passes through the heel of the wall
C. Position and direction of the resultant earth pressure are known
D. All of the above

A

All of the above

277
Q

The lateral earth pressure on a retaining wall

A. Is equal to mass of the soil retained
B. Proportional to the depth of the soil
C. Proportional to the square of the depth of the soil
D. Proportional to the internal friction of the soil

A

Proportional to the depth of the soil

278
Q

The bearing capacity of a soil depends upon

A. Size of the particles
B. Shape of the particles
C. Cohesive properties of particles
D. All of the above

A

All of the above

279
Q

Pick up the correct statement applicable to plate load test

A. Width of the test pit for plate load test is made five times the width of the plate
B. At the centre of the test pit, a hole is dug out whose size is kept equal to the size of the test plate
C. Bottom level of the hole dug at the centre of the test pit, is kept at the level of the actual formation
D. All of the above

A

All of the above

280
Q

When a cohesionless soil attains quick condition, it looses

A. Shear strength
B. Bearing capacity
C. Both A and B
D. Neither A and B

A

Both A and B

281
Q

The rise of water table below the foundation influences the bearing capacity of soil mainly by reducing

A. Cohesion and effective angle of shearing resistance
B. Cohesion and effective unit weight of soil
C. Effective unit weight of soil and effective angle of shearing resistance
D. Effective angle of shearing resistance

A

Cohesion and effective unit weight of soil

282
Q

Contact pressure beneath a rigid footing resting on cohesive soil is

A. Less at edges compared to middle
B. More at edges compared to middle
C. Uniform throughout
D. None of the above

A

More at edges compared to middle

283
Q

For determining the ultimate bearing capacity of soil, the recommended size of a square bearing plate to be used in load plate test should be 30 to 75 cm square with a minimum thickness of

A. 5 mm
B. 10 mm
C. 15 mm
D. 25 mm

A

25 mm

284
Q

Terzaghi’s analysis assumes:

A. Soil is homogenous and isotropic
B. Elastic zone has straight boundaries inclined at = to the horizontal and plastic zones fully developed
C. Failure zones do not extend above the horizontal plane through the base of the footing
D. All of the above

A

All of the above

285
Q

The ultimate bearing capacity of a soil, is

A. Total load on the bearing area
B. Safe load on the bearing area
C. Load at which soil fails
D. Load at which soil consolidates

A

Load at which soil fails

286
Q

The minimum depth of building foundations on

A. Sandy soils is 80 cm to 100 cm
B. Clay soils is 90 cm to 160 cm
C. Rocky soils is 5 cm to 50 cm
D. All of the above

A

All of the above

287
Q

Select the incorrect statement

A. Bearing capacity of a soil depends upon the amount and direction of load
B. Bearing capacity of a soil depends on the type of soil
C. Bearing capacity of a soil depends upon shape and size of footing
D. Bearing capacity of a soil is independent of rate of loading

A

Bearing capacity of a soil depends upon the amount and direction of load

288
Q

The maximum pressure which a soil can carry without shear failure, is called

A. Safe bearing capacity
B. Net safe bearing capacity
C. Net ultimate bearing capacity
D. Ultimate bearing capacity

A

Safe bearing capacity

289
Q

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

A. Cohesion only
B. Angle of internal friction only
C. Both cohesion and angle of internal friction
D. None of the above

A

Angle of internal friction only

290
Q

Rise of water table in cohesion-less soils up to ground surface reduces the net ultimate bearing capacity approximately by

A. 25%
B. 50%
C. 75%
D. 90%

A

50%

291
Q

Allowable bearing pressure for a foundation depends upon

A. Allowable settlement only
B. Ultimate bearing capacity of soil only
C. Both allowable settlement and ultimate bearing capacity
D. None of the above

A

Both allowable settlement and ultimate bearing capacity

292
Q

For a loose sand sample and a dense sand sample consolidated to the same effective stress

A. Ultimate strength is same and also peak strength is same
B. Ultimate strength is different but peak strength is same
C. Ultimate strength is same but peak strength of dense sand is greater than that of loose sand
D. Ultimate strength is same but peak

A

Ultimate strength is same but peak strength of dense sand is greater than that of loose sand

293
Q

The maximum net pressure intensity causing shear failure of soil, is known

A. Safe bearing capacity
B. Net safe bearing capacity
C. Net ultimate bearing capacity
D. Ultimate bearing capacity

A

Net ultimate bearing capacity

294
Q

Which one of the following statements is true?

A. Clays are more porous than sands
B. Pressure of organic matter in a soil decreases the bearing capacity of the soil
C. Aluminous cement is used for foundations in soils with chemical deposits
D. All of the above

A

All of the above

295
Q

Pick up the correct statement from the following:

A. When water table is above the base of a footing, the dry weight m should be used for soil below water table
B. When water table is located somewhat below the base of a footing, the elastic wedge is partly of moist soil and partly of submerged soil, and a suitable reduction factor is used
C. When water table is just at the base of the footing, no reduction factor is used
D. None of these

A

When water table is located somewhat below the base of a footing, the elastic wedge is partly of moist soil and partly of submerged soil, and a suitable reduction factor is used

296
Q

In the plate loading test for determining the bearing capacity of soil, the size of square bearing plate should be

A. Less than 300 mm
B. Between 300 mm and 750 mm
C. Between 750 mm and 1 m
D. Greater than 1 m

A

Between 300 mm and 750 mm

297
Q

Negative skin friction on piles

A. Is caused due to relative settlement of soil
B. Is caused in soft clays
C. Decreases the pile capacity
D. All of the above

A

All of the above

298
Q

Pile foundations are generally preferred to for

A. Bridge foundations
B. Sky scrapper buildings
C. Residential buildings
D. Runways

A

Sky scrapper buildings

299
Q

The maximum load carried by a pile, when it continues to sink without further increase to load, is known as

A. Ultimate load carrying capacity
B. Ultimate bearing capacity
C. Ultimate bearing resistant
D. All of the above

A

All of the above

300
Q

Pick up the correct statement from the following:

A. If the ratio of depth to width is less than 2, it is shallow foundation
B. If the ratio of depth to width is more than 2, it is deep foundation
C. If the ratio of the length to width is between 1 and 2, it is spread foundation
D. All of the above

A

All of the above

301
Q

Number of piles required to support a column, is

A. 1
B. 2
C. 3
D. 4

A

3

302
Q

Under-reamed piles are generally

A. Driven piles
B. Bored piles
C. Precast piles
D. All of the above

A

Bored piles

303
Q

A plane inclined at an angle to the horizontal at which the soil is expected to stay in the absence of any lateral support, is known as

A. Natural slope line
B. Repose line
C. The line
D. All of the above

A

All of the above

304
Q

Factor of safety against sliding of a slope, is the ratio of

A. Actual cohesion to that required to maintain stability of slope
B. Shear strength to shear stress along the surface
C. Neither A nor B
D. Both A and B

A

Both A and B

305
Q

Failure of the stability of slopes, generally occurs along

A. Slip plane
B. A horizontal surface
C. A curved surface
D. All the surfaces

A

A curved surface

306
Q

The shearing force acting along the slice of a curved surface of slippage, causes the soil to slide

A. Down at the centre
B. Down at the toe
C. Upward at the centre
D. None of these

A

Down at the centre

307
Q

The slip at critical angle, is generally known

A. Deflexion 1-line
B. Rupture plane
C. Slip plane
D. All of the above

A

All of the above

308
Q

The change of moisture content of soils, changes the

A. Value of the angle of repose
B. Amount of compaction required
C. Cohesive strength of soil
D. All of the above

A

All of the above

309
Q

A soil mass is said to be in plastic equilibrium if

A. It is stressed to maximum
B. It is on the verge of failure
C. It is in plastic stage
D. It starts flowing

A

It is on the verge of failure

310
Q

For slopes of limited extent the surface of slippage, is usually along

A. A parabolic arc
B. An elliptical arc
C. A straight line
D. A circular arc

A

A circular arc

311
Q

For a base failure of a slope, depth factor

A. Df = 1
B. Df < 1
C. Df > 1
D. None of these

A

Df > 1

312
Q

If “C” is cohesion, “F” is factor of safety, “Y” is unit weight, “H” is the maximum height of embankment, the stability number, is

A. F/CγH
B. C/FγH
C. H/CFγ
D. γ/CFH

A

C/FγH

313
Q

If the failure of a finite slope occurs through the toe, it is known as

A. Slope failure
B. Face failure
C. Base failure
D. Toe failure

A

Toe failure

HGE (6 decks)

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