SOILS,E&F Geological Engineering CH5

Depressions in the soil surface generated by past glacial activity can result in the formation of (select one):

• boulder fields

• peat bogs

• earthquakes

• limestone

Contact of moving glacier ice with rocks can produce (select one):

• no discernible effect

• metamorphic rock

• major grinding action

• long-term cloud cover

Loess deposits are (select one):

• caused by glaciers

• caused by water

• caused by wind

The USCS classification is dependent on (select one):

• grain size

• Atterberg limits

• both of the above

In the USCS a fine-grain material is more than 50% smaller than the sieve:

• #200

• #100

• #40

Based on the Plasticity Chart, a CH (high plasticity clay) will have (select one):

• a Liquid Limit less than 50

• a Liquid Limit greater than 50

• a Plasticity Index less than 20

A highly organic soil is (select one):

• hardly ever a problem with regard to foundation establishment

• always is a problem with regard to foundation establishment

• always toxic to wildlife

A “rule of thumb” indicates that a significant absolute increase can occur in the soil to a depth of about (select one):

• 15% of the width of the foundation element

• 50% of the width of the foundation element

• 85% of the width of the foundation element

• The longest dimension of the building

As a river or creek carries soil particles in suspension and as the velocity of the current slows, the last particles to be deposited will be (select one):

• silt and clay

• sand

• gravel

An expansive soil may change volume due to the following (select one):

• rainfall

• evapotranspiration due to trees

• evaporation

• all of the above