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WorksheetsGeotechnical Engineering I-Midterm Exam
Total questions: 40
Worksheet time: 3620secs
1.) Geologic map contains what information among the given items below?
i. Mineral & Rock deposits
ii. History and Age of Soil Formation
iii. Extent and Distribution of Rock Formations
iv. Existing Geo-Hazards
a.) i & ii
b.) i, ii, & iv
c.) i, ii, & iii
d. all of the above
Which among the given choices is the correct order of the procedure for carrying out a Geotechnical Engineering project listed below?
i.) Specific Recommendation
ii.) Working hypothesis
iii.) Supervision
iv.) Site Reconnaisance
v.) Performance monitoring
a.) iv-iii--i-v
b.) iv-iii-ii-i-v
iv-ii-i-iii-v
d.)iv-ii-i-iii-v
3.) Rock formed as the soil particles settled out from a transporting medium during the deposition
a.) Sedimentary
b.) Igneous
c.) Metamorphic
d.) Conglomerates
Soil is formed as a result of natural processes. What processes made this possible?
i.) Parent rocks break down to form another rocks of varying properties.
ii.) Rocks undergo wear and tear and carried by transporting medium to form deposits.
iii.) Weather conditions induces reactions to produce minerals depending on the temperature.
iv.) Extreme pressure for a longer time causes soil to be cemented that result to stratification with different particle size distribution and characteristics.
v.) The structural arrangement of particles formed is influenced by the existing geo-hazards.
a.) i, ii, & iii
b.) ii, iii, iv, & v
c.) ii, iii & iv
d.) all of the above
5.) The behavior of coarse grained and fine grained soil differs significantly, on what ground?
i.) Fine soil has double layer property which made it comparable in strength that of coarse soil.
ii.) Double layer property of fines is the reason for the plasticity property of fines.
iii.) Double layer of clay is removable and exchangeable with the presence of other substances.
iv.) Coarse grained and fine grained have similar parent rocks and deposition history.
v.)These soils have different particle size distribution
a.) all of the above
b.) i, ii, iii & v
c.) ii, iii, & iv
d.) ii, iii, iv & v
The consequences of the particulate nature of soil are
i.) Deformations in soil is controlled by the strength of interactions between particles
ii.) Presence of water increases the strength of soil at the particle contact
iii.) Water may flow through the soil mass which alter the strength of soil
iv.) Properties of soil is affected by the decrease and increase of moisture content
a.) i, ii & iii
b.) i, ii & iv
c.) i, iii & iv
all of the above
7.) Formation and properties of alluvial deposits are influenced by
i.) Extreme flooding and precipitations
ii.) Grain size particle distribution
iii.) Climate and hydrological patterns
iv) Disaster mitigation efforts and structural development
a.) i, ii & iv
b.) all of the above
c.) i, ii , & iii
d.) i, iii & iv
8.) You are ask to evaluate a problematic soil such as alluvial or colluvium soil. Below are the correct report to be made.
i.) Alluvial and colluvium soils are both a by-product of natural disasters.
ii.) Alluvial comes from weathered rocks and Colluvium is formed by soil mass movement.
iii.) Alluvial deposit has uniform particle distribution and Colluvium has complex-varied interlayering of soil.
iv) Alluvial and Colluvium have similar inherent weaknesses such as loose, low strength, and compressible.
a.) i, ii & iv
b.) i, ii & iii
c.) all of the above
d.) ii, iii & iv
You are tasked to give an observation on the proper behavior of clay soil on a particular project. The appropriate recommendations are
i.) Clay has high potential for swelling
ii.) To improve strength of clay it requires pre-compression to remove the water
iii.) Clay is very compressible and deformable soil
iv.) Clay is easy to compact
a.) i, ii & iv
b.) i, ii & iii
c.) all of the above
d.) ii, iii & iv
10.) It describes the degree of packing or compactness of the soil particles.
a.) Void ratio
b.) relative density
c.) dry density
d.) compaction
11.) These information holds true for index properties of soil
i. Index properties are indicators of the soil looseness or denseness state.
ii. Index properties can be correlated to the type of minerals present
iii. Index properties gives the saturation condition of soil
iv. Index property tests are kind of mineralogy tests.
a.) i, ii & iv
b.) i, ii & iii
c.) ii, iii & iv
d.) all of the above
The determination of the particle size range for soils smaller than 0.075 mm is
a.) Sieve analysis
b.) Hydrometer analysis
c.) Particle size distribution analysis
d.) Screening analysis
17.) Particle size distribution provide information such as
i. The dominant particle size present in the soil mass
ii. The consistency and plasticity property of soil
iii. The geologic formation process that occur in the past.
iv. Composition that reflect its strength and compressibility behavior
a.) i, iii & iv
b.) i, ii & iii
c.) ii, iii & iv
d.) all of the above
What can be said to soil with montmorillonite clay minerals?
i. It has very high plasticity property which tends to have a viscous properties.
ii. Less likely to absorb water because of its low cation exchange.
iii. It has expansive behavior like prone to swelling when expose to water
iv. It has wide plasticity index range
a.) all of the above
b.) i, ii & iii
c.) ii, iii & iv
d.) i, iii & iv
Problem 1:Undisturbed soil sample was collected from the field in steel Shelby tubes for laboratory evaluation. The tube sample has a diameter of 71 mm, length of 558 mm, and a moist weight of 42.5 x 10-3 kN. If the oven-dried weight was 37.85 x 10-3 kN, and Gs = 2.69, calculate the following:
a. Moist unit weight in KN/m3 is
b. Field moisture content in % is
The degree of saturation of a soil is 55% and the moist unit weight is 16.66 kN/m3. When the moist unit weight increased to 17.92 kN/m3, the degree of saturation increased to 82.2%. Determine:
a. The specific gravity of soil
b.The void ratio of soil
Problem: For a soil with D60 = 0.81 mm, D30 = 0.41 mm, and D10 = 0.27 mm, calculate uniformity coefficient and coefficient of gradation.
Perform the analysis to determine the percentage passing in each sieve. Find the Percentage passing in the smallest sieve opening and the Percentage of sand of the soil sample using USCS scheme.
19.) The different states of fine grained soil under varying amount of moisture can be described in terms
a.) Activity index
b.) Mineral content
c.) Atterberg’s Limits
d.) Limit states
.) A saturated soil used to determine the shrinkage limit has initial volume = 20.2 cm3, final volume = 14.3 cm3, mass of wet soil is 34 g, and mass of dry soil is 24 g. Determine the shrinkage limit and the shrinkage ratio.
a.) 17.08 & 2.1
b.) 16.50 & 1.70
c.) 17.08 & 1.68
d.) 18 & 1.68
Problem 21-23. Refer to Figure 1 and table 2. Atterberg’s limit test was conducted with a soil having 21% moisture. Plastic limit is 19.1%. Dry density is 105 pcf.
21.) What is the Liquidity Index?
a.) 0.48
b.) 0.38
c.) 0.50
d.) 0.42
Problem 21-23. Refer to Figure 1 and table 2. Atterberg’s limit test was conducted with a soil having 21% moisture. Plastic limit is 19.1%. Dry density is 105 pcf.
22.) What type of minerals present?
a.) Ellite
b.) Chlorites
c.) Kaolinites
d.) Montmorillonite
Problem 21-23. Refer to Figure 1 and table 2. Atterberg’s limit test was conducted with a soil having 21% moisture. Plastic limit is 19.1%. Dry density is 105 pcf.
23.) Assess the behavior of this type of soil. Based on the Atterberg’s limit this soil has
i. Greater tendency to crack under extreme pressure
ii. Slightly plastic property
iii. Clay strength between moderate to weak
iv. Tendency to collapsible
a.) i, ii & iii
b.) i, ii & iv
c.) all of the above
d.) ii & iii & iv
24.) It is the systematic categorization of soils relative to the grain sized distribution and plasticity property of soil.
a.) rock quality designation
b.) soil designations
c.) Site evaluation
d.) soil and rock groupings
25. The index property of soil which is the basis for identifying swelling potential of soil.
26.) ASTM standard test for moisture content test?
a.) D 2213
b.) D 2217
c.) D 2216
d.) D 2219
27.) This test provides information relative to the grain size distribution of fine soil particles in a given soil mass.
a.) Hydrometer analysis
b.) Moisture test
c.) Specific gravity test
d.) Sieving method
28.) What is the minimum required temperature for drying soil sample in the oven in degrees celsius?
a.) 100
b.) 105
c.) 110
d.) 200
29.) What is the typical range of specific gravity of soil expected to on obtain from the test?
a.) 2-2.5
b.) 2.4-2.7
c.) 2.5-2.9
d.) 2.7-3.0
30.) What is the required size of soil needed for Liquid limit test?
a.) passing no.30
b.) passing no.200
c.) passing no.4
d.) passing no.40
31.) What is the mass of sample needed for plastic limit test?
a.) 30 g
b.) 50 g
c.) 100 g
d.) 150 g
32.) When is the wet preparation or sample washing in sieve analysis applied for?
a.) If gravel/sand is present
b.) With organic soil
c.) mixed soils
d.) with appreciable amount of fines
Problem 33-35 Given the particle size distribution of soil in Table 3. LL = 23, PL = 19 and clay fraction = 5%, Cu = 7, Cc = 2.
33.) How much percent is sand and clay/silt?
a.) 87 & 13
b.) 90 & 10
c.) 82 & 18
d.) 62 & 38
Problem 33-35 Given the particle size distribution of soil in Table 3. LL = 23, PL = 19 and clay fraction = 5%, Cu = 7, Cc = 2.
34.)What is the activity index, A?
a.) 0.70
b.) 0.90
c.) 0.80
d.) 0.5
Problem 33-35 Given the particle size distribution of soil in Table 3. LL = 23, PL = 19 and clay fraction = 5%, Cu = 7, Cc = 2.
35.) Description of soil based on activity index?
a.) Inactive
b.) Normal
c.) Active
d.) Very Active
36. The index property of soil which is the basis for identifying swelling potential of soil is (a) .
37. The soil which has the greater tendency to attract water has greater ______.
38. The liquid limit of sensitive clay may be______ than the moisture content.
39.) A problematic soil which is characterized by being prone to solubility and cavity development.
a.) Soft soil
b.) Limestone deposit
c.) Swelling clay
d. Quick clay
40.) What is soil fabric?
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