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Geotechnical Engineering MCQs | Geotechnical Engineering Short Questions and Answers

Questions
41 Sand particles are made of
A kaolinite
B illite
C montmorillonite
D rock minerals

Answer: rock minerals
42 Effective stress is
A important because it is a function of engineering properties of soil
B the stress at particles contact
C a physical parameter that can be measured
D all of the above

Answer: important because it is a function of engineering properties of soil
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43 The total and effective stresses at a depth of 5 m below the top level of water in a swimming pool are respectively
A 0.5 kg/cm2 and zero
B zero and zero
C 0.5 kg/cm2 and 0.5 kg/cm2
D none of the above

Answer: 0.5 kg/cm2 and zero
44 Quick sand is a
A flow condition occurring in cohesive soils
B flow condition occurring in cohesionless soils
C type of sand
D flow condition occurring in both cohesive and cohesionless soils

Answer: type of sand
45 Physical properties of a permeant which influence permeability are
A unit weight only
B viscosity only
C both viscosity and unit weight
D none of the above

Answer: both viscosity and unit weight
46 Which of the following methods is best suited for determination of permeability of coarse-grained soils ?
A falling head method
B constant head method
C both the above
D none of the above

Answer: constant head method
47 Due to a rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively. If other things remain constant, the coefficient of permeability
A increases by 50%
B increases by 25%
C decreases by 33.3%
D none of the above

Answer: increases by 50%
48 The total discharge from two wells situated near to each other is
A less than the sum of the discharges from individual wells
B sum of the discharges from individual wells
C equal to larger of the two discharges from individual wells
D greater than the sum of the discharges from individual wells

Answer: less than the sum of the discharges from individual wells
49 The most suitable method for drainage of fine grained cohesive soils is
A electroosmosis method
B well ppint system
C vacuum method
D None of the above

Answer: electroosmosis method
50 The slope of isochrone at any point at a given time indicates the rate of change of
A pore water pressure with depth
B effective stress with time
C effective stress with depth
D none of the above

Answer: pore water pressure with depth
51 Which one of the following clays behaves like a dense sand ?
A over-consolidated clay with a low over-consolidation ratio
B normally consolidated clay
C under-consolidated clay
D over-consolidated ciay with a high over-consolidation ratio

Answer: over-consolidated ciay with a high over-consolidation ratio
52 Coefficient of consolidation of a soil is affected by
A permeability
B compressibility
C both compressibility and permeability
D none of the above

Answer: both compressibility and permeability
53 Degree of consolidation is
A directly proportional to time and inversely proportional to square of drainage path
B directly proportional to time and inversely proportional to 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

Answer: directly proportional to time and inversely proportional to square of drainage path
54 Time factor for a clay layer is
A directly proportional to permeability of soil
B a dimensional parameter
C inversely proportional to drainage path
D independent of thickness of clay layer

Answer: directly proportional to permeability of soil
55 Coefficient of consolidation for clays normally
A increases with increase in liquid limit
B first increases and then decreases with increase in liquid limit
C remains constant at all liquid limits
D decreases with increase in liquid limit

Answer: decreases with increase in liquid limit
56 Compressibility of sandy soils is
A much less than that of clayey soils
B almost equal to that of clayey soils
C much greater than that of clayey soils
D none of the above

Answer: much less than that of clayey soils
57 The ultimate consolidation settlement of a structure resting on a soil
A decreases with the decrease in the plastic limit
B increases with the increase in the initial voids ratio
C increases with the decrease in the porosity of the soil
D decreases with the increase in the initial voids ratio

Answer: decreases with the increase in the initial voids ratio
58 The ultimate consolidation settlement of a soil is
A directly proportional to the compression index
B directly proportional to the voids ratio
C inversely proportional to the compression index
D None of the above

Answer: directly proportional to the compression index
59 Coarse grained soils are best compacted by a
A vibratory roller
B drum roller
C rubber tyred roller
D none of the above

Answer: vibratory roller
60 With the increase in the amount of compaction energy
A optimum water content decreases but maximum dry density increases
B both optimum water content and maximum dry density increase
C optimum water content increases but maximum dry density decreases
D both optimum water content and maximum dry density decrease

Answer: optimum water content decreases but maximum dry density increases

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