Florida General Contractor Florida General Contractor Soils and Foundation Systems

Question 1

Which material typically has the highest allowable bearing capacity for foundation design?

Accepted Answer

Bedrock

Answer

Loose sand

Answer

Soft clay

Answer

Organic silt

Question 2

What is the standard unit used to express soil bearing capacity in the United States?

Accepted Answer

Pounds per square foot (psf)

Answer

Pounds per cubic foot (pcf)

Answer

Pounds per linear foot (plf)

Answer

Kilopascals (kPa)

Question 3

Why are Florida building footings NOT required to be placed at a minimum frost-protection depth?

Accepted Answer

Florida's climate does not produce freezing ground temperatures

Answer

Florida code exempts residential buildings

Answer

Footings in Florida must use special anti-frost concrete

Answer

Florida relies on insulated slab edges instead

Question 4

Which field test is most commonly used to verify the in-place density of compacted fill during construction?

Accepted Answer

Nuclear density gauge test

Answer

Atterberg limits test

Answer

Grain size analysis

Answer

Standard penetration test (SPT)

Question 5

What is the primary reason geotechnical soil borings are performed before a construction project?

Accepted Answer

To determine soil layers, bearing capacity, and groundwater conditions for foundation design

Answer

To identify underground utilities

Answer

To measure soil color and texture

Answer

To check for buried archaeological artifacts

Question 6

Which underlying geological condition is primarily responsible for sinkhole formation in Florida?

Accepted Answer

Dissolution of limestone (karst) bedrock by groundwater

Answer

Expansive clay layers

Answer

Permafrost thaw

Answer

Liquefaction of saturated sand

Question 7

Which type of foundation is most commonly used for light residential construction on stable soil in Florida?

Accepted Answer

Spread (isolated) footing

Answer

Drilled caisson

Answer

Mat (raft) foundation

Answer

Timber pile