Q.1

A stratum of clay 2 m thick will get consolidatedinyears. For theconsolidation of 8 m thick stratum of the same clay, the time required is

  • 100 years
  • 120 years
  • 140 years
  • 160 years
  • 180 years.
Q.2

The passive earth pressure of a soil, is proportional to (where φ is the angle of internal friction of the soil.)

  • tan (45° - φ)
  • tan (45° + φ)
  • tan2 (45° - φ
  • tan2 (45° + φ)
Q.3

A pile is being driven with a drop hammer weighingkg and having a free fall of 1.m. If the penetration with last blow is 5 mm, the load carrying capacity of the pile, -according to the Engineering News formula, is

  • 100 tonnes
  • 50 tonnes
  • 20 tonnes
  • 10 tonnes.
Q.4

If the specific gravity of a soil particle of 0.cm diameter is 2.its terminal velocity while settling in distilled water of viscosity, 0.poise, is

  • 0.2200 cm/sec
  • 0.2225 cm/sec
  • 0.2250 cm/sec
  • 0.2275 cm/sec
  • 0.2300 cm/sec
Q.5

The critical exist gradient of seepage water in soils, is

  • directly proportional to the voids ratio
  • inversely proportional to the specific gravity
  • directly proportional to the specific gravity
  • inversely proportional to the voids ratio
  • none of these.
Q.6

For a homogeneous earth damm high having 2 m free broad, a flow net was constructed and the results were : Number of potential drops = 2.4 Number of flow channels = 0.If coefficiency of permeability of the dam mateiral is 3 x 10-3 cm3/sec, the discharge per metre length of dam, is

  • 12 x 10-5 m3/sec
  • 24 x 10-3 m3/sec
  • 6 x 10-5 m3/sec
  • 24 x 10-5 m3/sec
Q.7

The equation τ = C + σ tan φ is given by

  • Rankine
  • Coulomb
  • Culaman
  • Mohr.
Q.8

Over-consolidation of soils is caused due to

  • erosion of over burden
  • melting of ice sheets after glaciation
  • permanent rise of water table
  • all the above.
Q.9

Si particles

  • show dilatancy
  • swell when moist
  • possess high strength when dry
  • disintegrate easily.
Q.10

Negative skin friction on piles

  • is caused due to relative settlement of the soil
  • is caused in soft clays
  • decreases the pile capacity
  • all of the above.
Q.11

Terzaghi's analysis assumes :

  • soil is homogeneous and isotropic
  • elastic zone has straight boundaries inclined at ψ = φ to the horizontal and plastic zones fully developed
  • failure zones do not extend above the horizontal plane through the base of the footing
  • all the above.
Q.12

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

  • safe bearing capacity
  • net safe bearing capacity
  • net ultimate bearing capacity
  • ultimate bearing capacity.
Q.13

A moist soil sample weighingg has a volume ofcc. If water content isand value of G = 2.the void ratio is

  • 0.55
  • 0.65
  • 0.75
  • 0.80
Q.14

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

  • Resilience of soils
  • Elasticity of soils
  • Compressibility of soils
  • None of these.
Q.15

The direct shear test suffers from the following disadvantage:

  • Drain condition cannot be controlled
  • Pore water pressure cannot be measured
  • Shear stress on the failure plane is not uniform.
  • The area under the shear and vertical loads does not remain constant throughout the test
  • All the above.
Q.16

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 forhours at temperature ranging from

  • 80° to 90°C
  • 90° to 95°C
  • 95° to 100°C
  • 103° to 105°C
  • 105° to 110°C
Q.17

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

  • pycnometer
  • oven-drying method
  • calcium carbide method
  • alcohol method.
Q.18

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

  • homogeneous
  • isotropic
  • incompressible
  • all the above.
Q.19

Pick up the incorrect statement from the following:

  • The smaller the size of the pores, the higher the water can rise above the water table.
  • Below the water table, the pore water may be static.
  • The hydrostatic pressure depends on the depth below the water level.
  • The attractive forces between the particles, caused due to negative pressure of water held above the water table is called soil suction.
  • None of these.
Q.20

Flow net is used for the determination of

  • quantity of seepage
  • hydrostatic pressure
  • seepage pressure
  • exit gradient
  • all the above.
Q.21

The ultimate bearing capacity of a soil, is

  • total load on the bearing area
  • safe load on the bearing area
  • load at which soil fails
  • load at which soil consolidates.
Q.22

g of wet soil was taken in a pycnometer jar of weightg in order to find the moisture content in the soil, with specific gravity of soil particles 2.The weight of soil and remaining water filled in pycnometer without air bubbles wasg and the weight of pycnometer filled with water alone wasg. The moisture content in the soil is

  • 24.2%
  • 18.2%
  • 53.8%
  • none of these.
Q.23

The factor which affects the compaction, is

  • moisture content
  • compacting content
  • method of compaction
  • type of soil
  • All the above.
Q.24

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

  • 90° + effective angle of shearing resistance
  • 90° + half of the angle of shearing resistance
  • 45° - half of the angle of shearing resistance
  • 45° + half of the angle of shearing resistance.
Q.25

The shear resistance of a soil is con-tituted basically of the following component.

  • The frictional resistance to translocation between the individual soil particles at their contact point
  • To the structural relation to displacement of the soil because of the interlocking of the particles
  • Cohesion and adhesion between the surfaces of the soil particles
  • All the above.
Q.26

If the unit weight of sand particles is 2.g/cc. and porosity in loose state is 44%, the critical hydraulic gradient for quick sand condition, is

  • 0.91
  • 0.92
  • 0.93
  • 0.94
  • 0.95
Q.27

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

  • porosity
  • specific gravity
  • void ratio
  • water content.
Q.28

For shear strength, triaxial shear test is suitable because

  • it can be performed under all three drainage conditions
  • precise measurement of the pore pressure and volume change during the test is possible
  • stress distribution on the failure plane, is uniform
  • state of stress within the specimen during any stage of the test as well as at failure, is completely determined
  • all the above.
Q.29

Pick up the incorrect statement from the following:

  • Compaction has no effect on the structure of a soil
  • Permeability decreases with increase in the dry density of a compacted soil
  • A wet side compacted soil is more compressible than a dry side compacted soil
  • Dry side compaction soils swell more when given access to moisture
  • None of the these.
Q.30

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

  • liquid limit
  • plastic limit
  • shrinkage limit
  • permeability limit.
0 h : 0 m : 1 s