Soil Mechanics and Foundation Engineering Quiz | Soil Mechanics and Foundation Engineering Objective Type Questions and Answers

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Questions
21 At liquid limit, all soils possess
A same shear strength of small magnitude
B same shear strength of large magnitude
C different shear strengths of small magnitude
D different shear strengths of large magnitude

Answer: same shear strength of small magnitude
22 Which of the following soils has more plasticity index ?
A sand
B silt
C clay
D gravel

Answer: clay
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23 The water content of soil, which represents the boundary between plastic state and liquid state, is known as
A liquid limit
B plastic limit
C shrinkage limit
D plasticity index

Answer: liquid limit
24 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.

Answer: A uniform soil has less strength and stability than a non-uniform soil.
25 The admixture of coarser particles like sand or silt to clay causes
A 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

Answer: decrease in both liquid limit and plasticity index
26 If the plasticity index of a soil mass is zero, the soil is
A sand
B silt
C clay
D clayey silt

Answer: sand
27 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

Answer: plasticity index to flow index
28 When the plastic limit of a soil is greater than the liquid limit, then the plasticity index is reported as
A negative
B zero
C non-plastic (NP)
D 1

Answer: zero
29 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

Answer: plastic state
30 According to Atterberg, the soil is said to be of medium plasticity if the plasticity index PI is
A 0 < PI < 7
B 7 < PI < 17
C 17 < PI < 27
D PI > 27

Answer: 7 < PI < 17
31 Uniformity coefficient of a soil is
A always less than 1
B always equal to 1
C equal to or less than 1
D equal to or gi eater than 1

Answer: equal to or gi eater than 1
32 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

Answer: none of the above
33 Which of the following is a measure of particle size range ?
A effective size
B uniformity coefficient
C coefficient of curvature
D none of the above

Answer: uniformity coefficient
34 The hydrometer method of sedimentation analysis differs from the pipette analysis mainly in
A the principle of test
B the method of taking observations
C the method of preparation of soil suspension
D all of the above

Answer: the method of taking observations
35 In hydrometer analysis for a soil mass
A both meniscus correction and dispersing agent correction are additive
B both meniscus correction and dispersing agent correction are subtractive
C meniscus correction is additive and dispersing agent correction is subtractive
D meniscus correction is subtractive and dispersing agent correction is additive

Answer: meniscus correction is additive and dispersing agent correction is subtractive
36 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

Answer: between 0.2 mm and 0.0002 mm
37 A pycnometer is used to determine
A water content and voids ratio
B specific gravity and dry density
C water content and specific gravity
D voids ratio and dry density

Answer: water content and specific gravity
38 For proper field control, which of the following methods is best suited for quick determination of water content of a soil mass ?
A oven drying method
B sand bath method
C alcohol method
D calcium carbide method

Answer: calcium carbide method
39 If the material of the base of the Casagrande liquid limit device on which the cup containing soil paste drops 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

Answer: the liquid limit of soil always increases
40 According to IS classification, the range of silt size particles is
A 4.75 mm to 2.00 mm
B 2.00 mm to 0.425 mm
C 0.425 mm to 0.075 mm
D 0.075 mm to 0.002 mm

Answer: 0.075 mm to 0.002 mm

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