KDOT Geotechnical & Earthwork Inspection 3

Question 1

According to KDOT practice, what action should be taken when embankment fill material delivered to the project contains significantly more rock than the approved material sample?

Accepted Answer

Reject or quarantine the load and notify the engineer for evaluation

Answer

Material that deviates significantly from the approved sample must be quarantined and evaluated by the engineer before placement.

Question 2

In a sand cone density test, the weight of sand filling the hole is used to determine:

Accepted Answer

The volume of the excavated hole

Answer

The sand of known unit weight fills the excavated hole, and its measured weight is used to back-calculate the volume of the hole.

Question 3

What does the term 'shrinkage factor' mean in earthwork calculations?

Accepted Answer

The ratio comparing the volume of soil in bank measure to its volume when compacted in place

Answer

Shrinkage factor accounts for the fact that a cubic yard of soil in the borrow pit (bank measure) occupies less volume once compacted in the embankment.

Question 4

Which condition typically requires a KDOT inspector to suspend embankment fill operations?

Accepted Answer

Active rainfall or standing water in the fill zone

Answer

Active rain or standing water in the placement zone prevents achieving proper compaction and must cause a work suspension.

Question 5

A KDOT inspector is checking subgrade preparation. Which of the following defects requires correction before embankment placement begins?

Accepted Answer

Soft or yielding zones identified by proofrolling

Answer

Soft or yielding zones identified during proofrolling indicate inadequate bearing capacity that must be corrected before fill placement.

(KDOT) Certified Kansas Department of Transportation Inspector Practice Test

(KDOT) Certified Kansas Department of Transportation Inspector Practice Test

KDOT Geotechnical & Earthwork Inspection 3