CTQP Earthwork Construction Inspection

Question 1

What does the term 'optimum moisture content' refer to in earthwork compaction?

Accepted Answer

The moisture level at which soil achieves maximum dry density

Answer

The moisture level at which soil is too wet to compact

Answer

The moisture level required for plant growth on embankments

Answer

The moisture level at which soil becomes saturated

Question 2

Which FDOT test method is used to determine the field density of compacted embankment material?

Accepted Answer

ASTM D 1556 or nuclear gauge method

Answer

AASHTO T 99

Answer

AASHTO T 180

Answer

ASTM D 2166

Question 3

What minimum percent compaction is typically required for embankment fill under Florida Department of Transportation specifications?

Accepted Answer

95%

Answer

85%

Answer

90%

Answer

100%

Question 4

What is a 'borrow pit' in the context of CTQP earthwork inspection?

Accepted Answer

An off-site area from which suitable fill material is obtained

Answer

An excavation area where unsuitable material is disposed

Answer

A temporary storage pond for stormwater

Answer

A test pit used for soil classification

Question 5

During earthwork inspection, what is the maximum lift thickness typically allowed for general embankment before compaction?

Accepted Answer

12 inches loose measure

Answer

6 inches loose measure

Answer

18 inches loose measure

Answer

24 inches loose measure

Question 6

What does 'unsuitable material' mean in FDOT earthwork specifications?

Accepted Answer

Material that cannot be adequately compacted or that will cause settlement

Answer

Material with a bearing capacity below 5 tons per square foot

Answer

Any material that contains clay

Answer

Material that fails the Atterberg limits test