©JUSTTRACY EXAM SOLUTIONS
19/11/2024 2:50pm
Soil Mechanics Exam Questions And
Improved Responses
Soil Mechanics - answers✔✔Application of static, mechanics of materials, and fluid
mechanics to describe the behavior of soils
Soil - answers✔✔Weathering rocks and minerals
What are the differences between sand and clay? (size, shape, strength comes from __?) -
answers✔✔Sand: larger/coarse grained, rounder, strength from frictional forces between
particles
Clay: small/fine grained, flat, strength from water interaction
Effective stress - answers✔✔stress felt by soil skeleton
Consolidation - answers✔✔water forced out of pore spaces
settlement - answers✔✔volume is changing
differential settlement - answers✔✔one side settles, not the other
Geosynthetics - answers✔✔man made plastic sheets (hydraulic barriers)
Retaining Structures - answers✔✔Hold soil at steeper slope than the soil can stand
How old is the Earth? - answers✔✔4.6 billion years
Lithosphere - answers✔✔rocky upper mantle and crust, moves as solid plate
, ©JUSTTRACY EXAM SOLUTIONS
19/11/2024 2:50pm
Asthenosphere - answers✔✔low mantle, hot, weak, ductile
Rock - answers✔✔naturally formed aggregate(collection) of minerals
Igneous Rock - answers✔✔solidified from molten rock
Diff between magma and lava? - answers✔✔magma is underground (intrusive), lava is above
(extrusive)
Mineral - answers✔✔naturally formed, solid, forged inorganically, specified chemical
composition
Which are minerals? ice, water, coal - answers✔✔ice=mineral
water=not mineral
coal=not mineral
Regolith - answers✔✔loose layer of debris from weathering
What are the three main rock groups? - answers✔✔igneous, sedimentary, metamorphic
What rocks make up the crust, what rocks make up the surface? - answers✔✔crust = 95%
igneous and metamorphic
surface = 75% sedimentary
Cycle for rocks - answers✔✔rocks formed --> uplift --> weathering
Residual soil - answers✔✔rate of soil formation is faster than transportation/erosion
Eolian soil - answers✔✔transported by wind
19/11/2024 2:50pm
Soil Mechanics Exam Questions And
Improved Responses
Soil Mechanics - answers✔✔Application of static, mechanics of materials, and fluid
mechanics to describe the behavior of soils
Soil - answers✔✔Weathering rocks and minerals
What are the differences between sand and clay? (size, shape, strength comes from __?) -
answers✔✔Sand: larger/coarse grained, rounder, strength from frictional forces between
particles
Clay: small/fine grained, flat, strength from water interaction
Effective stress - answers✔✔stress felt by soil skeleton
Consolidation - answers✔✔water forced out of pore spaces
settlement - answers✔✔volume is changing
differential settlement - answers✔✔one side settles, not the other
Geosynthetics - answers✔✔man made plastic sheets (hydraulic barriers)
Retaining Structures - answers✔✔Hold soil at steeper slope than the soil can stand
How old is the Earth? - answers✔✔4.6 billion years
Lithosphere - answers✔✔rocky upper mantle and crust, moves as solid plate
, ©JUSTTRACY EXAM SOLUTIONS
19/11/2024 2:50pm
Asthenosphere - answers✔✔low mantle, hot, weak, ductile
Rock - answers✔✔naturally formed aggregate(collection) of minerals
Igneous Rock - answers✔✔solidified from molten rock
Diff between magma and lava? - answers✔✔magma is underground (intrusive), lava is above
(extrusive)
Mineral - answers✔✔naturally formed, solid, forged inorganically, specified chemical
composition
Which are minerals? ice, water, coal - answers✔✔ice=mineral
water=not mineral
coal=not mineral
Regolith - answers✔✔loose layer of debris from weathering
What are the three main rock groups? - answers✔✔igneous, sedimentary, metamorphic
What rocks make up the crust, what rocks make up the surface? - answers✔✔crust = 95%
igneous and metamorphic
surface = 75% sedimentary
Cycle for rocks - answers✔✔rocks formed --> uplift --> weathering
Residual soil - answers✔✔rate of soil formation is faster than transportation/erosion
Eolian soil - answers✔✔transported by wind
