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Wednesday, February 1, 2017




Roll No­­­­­­­­­_________
SOIL AND FOUNDATION ENGG.
4th Exam /Civil/5109/May’09
                                                             
Duration 3 Hrs.
1.     Fill in the blanks
a.     Open caissons are also known as _____
b.     The piles having one or more bulbs are called___
c.      Mat footing is also called ______
d.     Core cutter method is used to calculate _____
e.      Maximum compaction is obtained at ______
State true or false
f.       Sand drains are infact weak piles used to stabilize soil.
g.     Due to lowering of W.T.. settlement increases.
h.     Degree of consolidation depends upon soil permeability
i.       Darcy’s law is valid for laminar flow.
j.       The ratio of D60 to D10 is called coefficient of uniformity (CU)
Choose the correct one
i.       Colloids are particles of size less than
a.     0.0001 mm
b.     0.002mm
c.      0.01m
d.     0.02m
j.       Plasticity index of clay soil is
a.     0
b.     <7
c.      <17
d.     <7<17
k.     Seepage velocity is equal to velocity of flow multiplied by
a.     (1+e)
b.      
c.     
d.     (e-1)
l.       The hydraulic gradient (i) is given by
a.     hxL
b.     L/h
c.      h/L
d.     none of these
m.  the range of optimum water content for clays is
a.     6 to 10%
b.     8 to 20%
c.      12 to 16%
d.     14 to 20%
Section –B
Note: Attempt any ten questions
2.       
a.     Prove e.s. =W.G
b.     What are index properties ?
c.      How pressure bulb is drawn?
d.     What is plasticity index?
e.      What is the shape of clay particles?
f.         What is peat?
g.     When e =WG and in what type of soil?
h.     How soils are divided in India on the basis of physiography, climatic conditions and geological formation
i.       What is the importance of particle size distribution curve?
j.       What are plastic soils?
k.     What are mechanical  rammers?
l.       How triaxial  test differs from direct shear test (any three points)
Section –C
Note: Attempt any three questions
3.       
a.     What are stress – strain curves ? give their importance?
b.     How piles are installed ?
4.       
a.     What is the influence of soil conditions on the exploratory programme?
b.     How shear strength is measured with SPT?
c.       How will you present soil investigation
5.       
a.     How will you control compaction ? explain briefly
b.     What are the effects of black cotton soils on construction of buildings
c.      What is total settlement?
6.     The coefficient of permeability of a soil sample 60 mm in height is 3 ml/ day. If a quantity of water equal to 500 ml passes down in 8  minutes under an effective constant head of 300 mm, determine cross sectional aera of the soil sample in cm2
7.     A soil sample has a void ratio of 0.8 and specific  gravity of solid particles is 2.67
a.     Can you determine the moisture content from the above information ? if not, why? If yes , determine it.

b.     If moisture content cannot be determined, then can you find the upper and lower limits? If yes, find them.

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