DOT Standards

Question 1

You may dispose of concrete by incorporating it in adjacent embankments as long as it is:

Answer 1

Broke into max 10” dimension
Buried at least 3 feet below finished grade
Buries at least 10 feet from the drip line of trees or highway

Question 2

Cut tree branches that extend over the roadway and hang within _____ of finished grade

Answer 2

20 feet

Question 3

In embankment areas where the grading plane is ____ feet or more above original ground

Answer 3

2 feet

Question 4

Disposal from clearing and grubbing activities you must reduce combustible material to chips with a ____ inch maximum thickness.

Answer 4

1/2”

Question 5

If a dust suppressant or dust control binder is to be used, submit a dust treatment plan at least ___ days before starting job site activitie

Answer 5

15 days

Question 6

Any point on the completed excavation slope must be within _____ feet of the planned slope, unless the excavation is in rock, in which case, any point on the completed slope must be within ____ feet of the
planned slope

Answer 6

0.5 foot ; 2 feet

Question 7

Completed slopes must be within ____ foot from the grade established by the Engineer

Answer 7

0.2 foot

Question 8

If you perform structure backfill compaction by ponding and jetting, the thickness of the backfill layer must not exceed __ feet

Answer 8

4 feet

Question 9

Bring backfill up uniformly on all sides of structures or drainage facilities. Backfill layer thickness must not exceed ____ foot before compacting.

Answer 9

0.67 foot

Question 10

Compact structure backfill to a relative compaction of at least 95% percent except you may compact
structure backfill to a relative compaction of at least 90% percent at the following locations:

Answer 10

1. Over side drains
2. Footings for slope protection , slope paving and aprons

Question 11

If slurry cement backfill is used for structure backfill, you may reduce the excavation width such that the clear distance between the outside of the pipe and the side of the excavation on each side of the pipe is at least (1) ___ inches for pipes 42 inches or less in diameter or span and (2) ___ for pipes over 42 inches in diameter or span

Answer 11

6 inches for ≤ 42

12 inches for > 42

Question 12

Construct embankment in layers. The loose thickness of each layer must not exceed __ inches

Answer 12

8 inches

Question 13

The grading factor used for excavated materials for determining payment quantity for imported borrow is ___

Answer 13

1.0

Question 14

Scarify the surface of lime stabilized soil at least _______ between each layer.

Answer 14

2 inches

Question 15

Mix lime on the same day it is applied. After the initial mixing, allow a mellowing period for at least ____ hours before final mixing

Answer 15

36 hours

Question 16

Compacting lime do not use what type of compactor ? Compact the lime stabilized soil to at least __% percent relative compaction.

Answer 16

Vibratory roller ; 95%

Question 17

Compact each AS (aggregate sub-base ) layer to at least ___ percent relative compaction.

Answer 17

95%

Question 18

Where biaxial geogrid is shown, compact AS with either (1) a _______________ or (2) a ___________________. Do not use vibratory devices during compaction.

Answer 18

Smooth-wheeled roller or rubber tire roller

Question 19

Where manholes are to be lowered, remove the top portion to ___ feet below finished grade or to an authorized depth

Answer 19

3.5 feet

Question 20

Obtain authorization before disposing of surplus material or using it for any of the following:

Answer 20

1. Widening embankments uniformly
2. Flattening slopes
3. Placing along the roadway or at other locations