KDOT Asphalt & Concrete Paving Inspection 4

Question 1

During asphalt paving, the inspector measures mat thickness and finds it consistently 1/2 inch thin on the right side of the lane. The most likely cause is:

Accepted Answer

The screed is tilted, causing uneven head of material on one side

Answer

Consistent thickness variation across the mat width typically indicates a tilted or unevenly adjusted screed, causing more or less material on one side.

Question 2

What is 'bleeding' in asphalt pavement and what does it indicate?

Accepted Answer

Asphalt binder migrating to the surface, indicating excess binder in the mix or inadequate air voids

Answer

Bleeding occurs when excess asphalt binder migrates to the pavement surface, filling air voids and creating a shiny, slippery film that reduces skid resistance.

Question 3

When should an inspector verify that concrete forms are properly staked, braced, and oiled before a concrete paving pour?

Accepted Answer

At least the day before the scheduled pour

Answer

Forms must be inspected at least the day before placement to allow time for corrections; checking forms only at pour time leaves no margin for fixing alignment or stability issues.

Question 4

What does 'raveling' in asphalt pavement describe, and what are the common causes?

Accepted Answer

Progressive loss of aggregate particles from the surface, caused by insufficient binder, poor aggregate bond, or early traffic loading

Answer

Raveling is the loss of aggregate from the pavement surface, resulting from inadequate binder content, poor coating of aggregate, construction during cold/wet conditions, or traffic before sufficient curing.

Question 5

An inspector finds that a concrete pavement joint was sawed too late. What is the likely consequence?

Accepted Answer

Uncontrolled random transverse cracking may have already occurred before sawing

Answer

If joints are not sawed within the required time window (typically 4–24 hours after placement depending on conditions), uncontrolled cracks may develop ahead of the saw.

(KDOT) Certified Kansas Department of Transportation Inspector Practice Test

(KDOT) Certified Kansas Department of Transportation Inspector Practice Test

KDOT Asphalt & Concrete Paving Inspection 4