CESSWI CESSWI Soil Properties and Site Characterization

Question 1

Which USDA soil texture class is generally considered the most erodible by water?

Accepted Answer

Silt loam

Answer

Clay

Answer

Gravel

Answer

Sandy clay

Question 2

What does the letter 'D' represent in NRCS Hydrologic Soil Group (HSG) classification?

Accepted Answer

Very slow infiltration rate — highest runoff potential

Answer

Very high infiltration rate

Answer

High infiltration rate

Answer

Slow infiltration rate

Question 3

The Universal Soil Loss Equation (USLE) factor 'K' represents what soil property?

Accepted Answer

Soil erodibility

Answer

Slope steepness

Answer

Crop management

Answer

Conservation practice

Question 4

A soil with a Unified Soil Classification of 'CH' is best described as:

Accepted Answer

Fat clay with high plasticity

Answer

Well-graded gravel

Answer

Poorly graded sand

Answer

Silty sand

Question 5

Which field test is commonly used on a construction site to estimate soil permeability in the field?

Accepted Answer

Double-ring infiltrometer test

Answer

Atterberg limits test

Answer

Proctor compaction test

Answer

Hydrometer analysis

Question 6

On a construction site soil report, a 'dispersion' problem refers to which condition?

Accepted Answer

Soil particles that deflocculate in water, making it highly erodible

Answer

Soil particles that resist compaction

Answer

Soil that collapses suddenly when wetted

Answer

Soil with high organic matter content