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Free download in PDF Geotechnical Engineering Objective Type Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(21)
The average coefficient of permeability of natural deposits
[A]
parallel to stratification is always less than that perpendicular to stratification
[B]
is always same in both directions
[C]
parallel to stratification may or may not be greater than that perpendicular to stratification
[D]
parallel to stratification is always greater than that perpendicular to stratification
Answer: parallel to stratification is always greater than that perpendicular to stratification
(2)
Select the incorrect statement.
[A]
Bearing capacity of a soil depends on the type of soil
[B]
Bearing capacity of a soil depends upon shape and size of footing
[C]
Bearing capacity of a soil is indepen-dent of rate of loading
[D]
Bearing capacity of a soil depends upon the amount and direction of load
Answer: Bearing capacity of a soil depends upon the amount and direction of load
(23)
Contact pressure beneath a rigid footing resting on cohesive soil is
[A]
more at edges compared to middle
[B]
less at edges compared to middle
[C]
uniform throughout
[D]
none of the above
Answer: more at edges compared to middle
(24)
In the plate loading test for determining the bearing capacity of soil, the size of square bearing plate should be
[A]
between 300 mm and 750 mm
[B]
less than 300 mm
[C]
greater than 1 m
[D]
between 750 mm and 1 m
Answer: between 300 mm and 750 mm
(25)
The rise of water table below the foundation influences the bearing capacity of soil mainly by reducing
[A]
cohesion and effective unit weight of soil
[B]
cohesion and effective angle of shearing resistance
[C]
effective angle of shearing resistance
[D]
effective unit weight of soil and effective angle of shearing resistance
Answer: cohesion and effective unit weight of soil
(26)
Coefficient of earth pressure at rest is
[A]
greater than active earth pressure but less than passive earth pressure
[B]
less than active earth pressure but greater than passive earth pressure
[C]
less than both the active and passive earth pressures
[D]
greater than both the active earth pressure and passive earth pressure
Answer: greater than active earth pressure but less than passive earth pressure
(27)
Allowable bearing pressure for a foundation depends upon
[A]
both allowable settlement and ultimate bearing capacity
[B]
allowable settlement only
[C]
ultimate bearing capacity of soil only
[D]
none of the above
Answer: both allowable settlement and ultimate bearing capacity
(28)
Select the incorrect statement.
[A]
Unconfined compression test can be carried out on all types of soils
[B]
In a direct shear box test, the plane of shear failure is predetermined
[C]
Better control is achieved on the drainage of the soil in a triaxial compression test
[D]
Stress distribution on the failure plane in the case of triaxial compression test is uniform
Answer: Unconfined compression test can be carried out on all types of soils
(29)
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 undrained test
[B]
consolidated drained test
[C]
unconsolidated drained test
[D]
None of the above
Answer: consolidated undrained test
(30)
The major principal stress in an element of cohesionless soil within the backfill of a retaining wall is
[A]
vertical if the soil is in a passive state of plastic equilibrium
[B]
inclined at 45° to the vertical plane
[C]
vertical if the soil is in an active state of plastic equilibrium
[D]
none of the above
Answer: vertical if the soil is in an active state of plastic equilibrium
31
Bishop's method of stability analysis
[A]
assumes the slip surface as an arc of a circle
[B]
is more conservative
[C]
neglects the effect of forces acting on the sides of the slices
[D]
all of the above
Answer: assumes the slip surface as an arc of a circle
32
Voids ratio of a soil mass can
[A]
take any value greater than zero
[B]
never be greater than unity
[C]
take values between 0 and 1 only
[D]
be zero
Answer: take any value greater than zero
33
If the volume of voids is equal to the volume of solids in a soil mass, then the values of porosity and voids ratio respectively are
[A]
0.5 and 1.0
[B]
1.0 and 0.0
[C]
0.0 and 1.0
[D]
1.0 and 0.5
34
When the degree of saturation is zero, the soil mass under consideration represents
[A]
two phase system with soil and air
[B]
one phase system
[C]
two phase system with soil and water
[D]
three phase system
Answer: two phase system with soil and air
35
For proper field control, which of the following methods is best suited for quick determination of water content of a soil mass ?
[A]
calcium carbide method
[B]
oven drying method
[C]
sand bath method
[D]
alcohol method
Answer: calcium carbide method
36
A pycnometer is used to determine
[A]
water content and specific gravity
[B]
water content and voids ratio
[C]
specific gravity and dry density
[D]
voids ratio and dry density
Answer: water content and specific gravity
37
The hydrometer method of sedimentation analysis differs from the pipette analysis mainly in
[A]
the method of taking observations
[B]
the principle of test
[C]
the method of preparation of soil suspension
[D]
all of the above
Answer: the method of taking observations
38
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]
plastic state
[B]
liquid state
[C]
semi-solid state
[D]
None of the above
39
The water content of soil, which represents the boundary between plastic state and liquid state, is known as
[A]
plastic limit
[B]
shrinkage limit
[C]
liquid limit
[D]
none of the above
40
Highway Research Board (HRB) classification of soils is based on
[A]
plasticity characteristics
[B]
particle size composition
[C]
both particle size composition and plasticity characteristics
[D]
none of the above
Answer: both particle size composition and plasticity characteristics
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