LARE Section 4 Test Questions
and Answers All Correct
How to find right angles without survey equipment - Answer- A squared + B squared =
C squared
Soil classification system - Answer- Unified Soil Classification System (USCS),
describes the texture and grain size of a soil
Soil classification for road construction - Answer- ASSHTO
Sieve Analysis of soil - Answer- grain characteristics of a soil, the higher the sieve
number the smaller the grain size
Ultra acidic and alkaline ranges - Answer- 3.5 acidic and 9 alkaline
Well graded soil - Answer- wide range of sizes and compacts better than poorly graded
soils
Poorly graded soil - Answer- similar particle sizes, better drainage than well graded soils
Soil permeability - Answer- quality at which air or water moves through the most
restrictive soil layer in the rooting zone
Slow soil permeability - Answer- .06-.6 inches per hour, typically the lower subsoil
Moderate soil permeability - Answer- .6-2 inches per hour, usually loamy subsoils
Rapid soil permeability - Answer- more than 2 inches per hour, often loose sandy soils
with little defined structure
Differential Settlement - Answer- Structural soil failure due to unequal settlement
Hardpan - Answer- dense layer of soil usually found below uppermost topsoil layer
Soil shear resistance - Answer- resistance to soil movement when pressure is applied,
the higher the shear resistance the greater compactive force required
Ericaceous plants - Answer- most require acidic soil, most plant material will not tolerate
excessively wet soil due to anaerobic conditions
and Answers All Correct
How to find right angles without survey equipment - Answer- A squared + B squared =
C squared
Soil classification system - Answer- Unified Soil Classification System (USCS),
describes the texture and grain size of a soil
Soil classification for road construction - Answer- ASSHTO
Sieve Analysis of soil - Answer- grain characteristics of a soil, the higher the sieve
number the smaller the grain size
Ultra acidic and alkaline ranges - Answer- 3.5 acidic and 9 alkaline
Well graded soil - Answer- wide range of sizes and compacts better than poorly graded
soils
Poorly graded soil - Answer- similar particle sizes, better drainage than well graded soils
Soil permeability - Answer- quality at which air or water moves through the most
restrictive soil layer in the rooting zone
Slow soil permeability - Answer- .06-.6 inches per hour, typically the lower subsoil
Moderate soil permeability - Answer- .6-2 inches per hour, usually loamy subsoils
Rapid soil permeability - Answer- more than 2 inches per hour, often loose sandy soils
with little defined structure
Differential Settlement - Answer- Structural soil failure due to unequal settlement
Hardpan - Answer- dense layer of soil usually found below uppermost topsoil layer
Soil shear resistance - Answer- resistance to soil movement when pressure is applied,
the higher the shear resistance the greater compactive force required
Ericaceous plants - Answer- most require acidic soil, most plant material will not tolerate
excessively wet soil due to anaerobic conditions
